EnOcean STM311C Transmitter Module User Manual

EnOcean GmbH Transmitter Module

User Manual

USER MANUAL V0.6 EnOcean GmbH Kolpingring 18a 82041 Oberhaching Germany Phone +49.89.67 34 689-0 Fax +49.89.67 34 689-50 info@enocean.com www.enocean.com Subject to modifications STM 31x / STM 31xC User Manual V0.6 September 7, 2010 3:58 PM Page 1/28 Patent protected: WO98/36395, DE 100 25 561, DE 101 50 128, WO 2004/051591, DE 103 01 678 A1, DE 10309334, WO 04/109236, WO 05/096482, WO 02/095707, US 6,747,573, US 7,019,241 Observe precautions! Electrostatic sensitive devices! Scavenger Transmitter Module STM 31x / STM 31xC September 7, 2010
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 2/28 STM 31X / STM 31XCREVISION HISTORY The following major modifications and improvements have been made to the first version of this document: No Major Changes 0.5 Initial version 0.6 New drawings added, Agency approvals added Published by EnOcean GmbH, Kolpingring 18a, 82041 Oberhaching, Germany www.enocean.com, info@enocean.com, phone ++49 (89) 6734 6890 © EnOcean GmbH All Rights Reserved Important! This information describes the type of component and shall not be considered as assured characteris-tics. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the EnOcean web-site: http://www.enocean.com. As far as patents or other rights of third parties are concerned, liability is only assumed for modules, not for the described applications, processes and circuits. EnOcean does not assume responsibility for use of modules described and limits its liability to the replacement of modules determined to be defective due to workmanship. Devices or systems contain-ing RF components must meet the essential requirements of the local legal authorities. The modules must not be used in any relation with equipment that supports, directly or indirectly, human health or life or with applications that can result in danger for people, animals or real value. Components of the modules are considered and should be disposed of as hazardous waste. Local government regulations are to be observed. Packing: Please use the recycling operators known to you. By agreement we will take packing mate-rial back if it is sorted. You must bear the costs of transport. For packing material that is returned to us unsorted or that we are not obliged to accept, we shall have to invoice you for any costs incurred.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 3/28 STM 31X / STM 31XCTABLE OF CONTENT 1 GENERAL DESCRIPTION................................................................................. 4 1.1 Basic functionality ......................................................................................... 4 1.2 Technical data .............................................................................................. 5 1.3 Physical dimensions....................................................................................... 5 1.4 Environmental conditions ............................................................................... 7 1.5 Ordering Information ..................................................................................... 7 2 FUNCTIONAL DESCRIPTION............................................................................ 8 2.1 Simplified firmware flow chart and block diagram.............................................. 8 2.2 Pin out......................................................................................................... 9 2.3 Pin description and operational characteristics ................................................ 10 2.3.1 Interface supply voltage........................................................................... 11 2.3.2 Analog and digital inputs .......................................................................... 12 2.4 Absolute maximum ratings (non operating) .................................................... 12 2.5 Maximum ratings (operating)........................................................................ 12 2.6 Power management and voltage regulators .................................................... 13 2.7 Configuration.............................................................................................. 13 2.7.1 Configuration via pins .............................................................................. 13 2.7.2 Configuration via serial interface ............................................................... 15 2.8 Radio telegram ........................................................................................... 16 2.8.1 Normal operation .................................................................................... 16 2.8.2 Teach-in telegram ................................................................................... 17 2.9 Transmit timing .......................................................................................... 17 2.10 Charging circuitry ................................................................................... 18 2.11 Energy consumption ............................................................................... 18 3 APPLICATIONS INFORMATION ...................................................................... 20 3.1 Using the WAKE pins ................................................................................... 20 3.2 Antenna options.......................................................................................... 22 3.2.1 Whip antenna (STM 310, STM 310C, STM 312, STM 312C) ........................... 22 3.2.2 Helical antenna (STM 311, STM 311C) ....................................................... 23 3.3 Transmission range ..................................................................................... 24 4 AGENCY CERTIFICATIONS ............................................................................ 25 4.1 CE Approval................................................................................................ 25 4.2 FCC (United States) certification ................................................................... 26 4.3 IC (Industry Canada) certification.................................................................. 28
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 4/28 STM 31X / STM 31XC1 GENERAL DESCRIPTION 1.1 Basic functionality The extremely power saving RF transmitter module STM 31x of EnOcean enables the realization of a wide range of wireless and maintenance free sensors such as temperature sensors, humidity sensors, or room operating panels. Power supply is provided by a small solar cell, an ex-ternal energy harvester, or an external 3V battery. An energy storage is installed to bridge periods with no supply from the energy harvester. The module pro-vides a user configurable cyclic wake up. After wake up the external sensors are supplied and after a configurable delay (default 2ms) the internal microcontroller reads the status of the connected sensors. A radio telegram will be transmitted in case of a change of any digital input value compared to the last sending or in case of a significant change of measured analogue values. In case of no relevant input change a redundant retransmission signal is sent after a user configurable number of wake-ups to announce all current values. In addition to the cyclic wake-up, a wake up can be triggered externally using a wake input or the internal LRN but-ton. Features with built-in firmware  Pre-installed solar cell (except STM 312/STM 312C)  On-board energy storage and charging circuit  On-board LRN button  On-board TX indicator LED  20 pin connector for external sensors  3 A/D converter inputs  3 digital inputs  Configurable wake-up and transmission cycle  Wake-up via Wake pins or LRN button Product variants  STM 310/310C: Variant including solar cell and whip antenna  STM 311/311C: Variant including solar cell and helical antenna  STM 312/312C: Variant including whip antenna but no pre-installed solar cell Features accessible via API Using the Dolphin API library it is possible to write custom firmware for the module. The API provides:  Integrated 16 MHz 8051 CPU with 32 KB FLASH and 2 kB SRAM  Various power down and sleep modes down to typ. 0.2 µA current consumption  Up to 13 configurable I/Os  10 bit ADC, 8 bit DAC
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 5/28 STM 31X / STM 31XC1.2 Technical data Antenna whip or helical antenna installed Frequency 315.0 MHz (STM 31xC)/868.3 MHz (STM 31x)Radio Standard EnOcean 868 MHz/315 MHzData rate/Modulation type 125 kbps/ASKConducted Output Power typ. 2 dBmPower Supply @ VDD Pre-installed solar cell (except STM312 / STM312C)Illumination 50-100000 lux2.1 V–5.0 V, 2.6 V needed for start-upInitial operation time in darkness @ 25°C typ. 4 days, energy storage fully charged, wake-up every 100 s, transmission of telegram every 1000 s on average1Operation start up time with empty energy store typ. 2.5 min @ 400 lux / 25°C incandescent or fluorescent lightInput Channels 3x digital input, 2x WAKE input , 3x analog input Resolution: 3x 8 bit or 1x 10 bit, 1x 8 bit, 1x 6 bitRadio Regulations R&TTE EN 300 220 (STM 31x)FCC CFR-47 Part 15 (STM 31xC) 1.3 Physical dimensions 1 Full performance of the PAS614L energy storage is achieved after a few days of operation at good illumination level. Performance degrades over life time, especially if energy storage is exposed to higher temperatures. Each 10K drop in temperature doubles the expected life span. PCB dimensions 43±0.2 x 16±0.3 x 1±0.1 mm Module height 9 mmWeight 3.3g (STM 312) – 6.2g (STM 311C), depending on variant
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 6/28 STM 31X / STM 31XC
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 7/28 STM 31X / STM 31XC 1.4 Environmental conditions Operating temperature -20 °C … +60 °CStorage temperature -20 °C … +60 °CHumidity 0% … 93% r.h., non-condensing 1.5 Ordering Information Type Ordering Code Frequency STM 310 S3001-D310 868.3 MHz STM 311 S3001-D311 868.3 MHz STM 312 S3001-D312 868.3 MHz STM 310C S3031-D310 315.0 MHz STM 311C S3031-D311 315.0 MHz STM 312C S3031-D312 315.0 MHz
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 8/28 STM 31X / STM 31XC 2 FUNCTIONAL DESCRIPTION 2.1 Simplified firmware flow chart and block diagram
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 9/28 STM 31X / STM 31XC 2.2 Pin out The figure above shows the pin out of the STM 31x hardware. The pins are named accord-ing to the naming of the EO3000I chip to simplify usage of the DOLPHIN API. The table in section 2.3 shows the translation of hardware pins to a naming that fits the functionality of the built-in firmware. EnergyStoreLR NLED1GNDCW_1CW_0WAKE0CP_1CP_0LEDLRNVDD Whip orhelical antennaUVDDextRESETBALUNPresence Signal(every 100th,every 10th,every cyclic wake-upor SW defined)Spontaneous wake-upCyclic Wake-up(every 1s ,10s , 100s, or SW defined) A/DPower management MicroControllerRF Transmitter868.3 MHz (STM31x)315.0 MHz (STM31xC)DOLPHINEO3000I16MHz OscillatorSWPWREnergyStorageVCHARVGCSolar CellLRN buttonTransmitIndicatorAD_2AD_1AD_0DI_2DI_1DI_0
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 10/28 STM 31X / STM 31XC2.3 Pin description and operational characteristics STM 31x H a rd w a re Sym bol STM 31x Firm w a re Sym bol Function C haracteristics GND GND Ground connection VDD VDD Supply voltage 2.1 V – 5.0 V; Start-up voltage: 2.6 V Maximum ripple: see 2.6 Connection of external 3 V battery possibleVCHAR VCHAR Charging input Input for external energy harvester (for use in STM 312). See 2.10. VGC VGC Voltage Gold Cap Connection of additional external energy storage or battery possible. See 2.10. SWPWR (= switched DVDD) SWPWR DVDD supply volt-age regulator out-put switched via transistor con-trolled by EO3000I WXIDIO pin. 1.8 V. Output current: max. 5 mA. Supply for external circuitry, available while not in deep sleep mode. SWPWR is switched on 2ms (default) before sampling of inputs and is switched off afterwards. The delay time can be configured, see 2.7.2 (needed for stabilization of sensors) UVDDext (=UVDD with 1.8MΩ in series) UVDD Ultra low power supply voltage regulator output Not for supply of external circuitry! For use with WAKE pins only, see section 3.1. Limited to max. 1 µA output current by internal 1.8 MΩ resistor! IOVDD (not available at pin connec-tor) IOVDD Digital interface supply voltage Internal connection to EO3000I DVDD (typ. 1.8 V) See 2.3.1. RESET RESET Reset input Programming I/F Active high reset (1.8 V) Fixed internal 10 kΩ pull-down. PROG_EN PROG_EN Programming I/F HIGH: programming mode active LOW: operating mode Digital input, fixed internal 10 kΩ pull-down. ADIO0 AD_0 Analog input Input read ~2 ms after wake-up. Resolution 8 bit. See also 2.7.2. ADIO1 AD_1 Analog input Input read ~2 ms after wake-up. Resolution 8 bit (default) or 10 bit. See 2.7.2. ADIO2 AD_2 Analog input Input read ~2 ms after wake-up. Resolution 8 bit (default) or 6 bit. See 2.7.2. ADIO3 DI_0 Digital input Input read ~2 ms after wake-up. See 2.7.2. Internal pull-up ADIO4 DI_1 Digital input Input read ~2 ms after wake-up. See 2.7.2. Internal pull-up
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 11/28 STM 31X / STM 31XCADIO6 DI_2 Digital input Input read ~2 ms after wake-up. See 2.7.2. Internal pull-up LED Transmission indicator LED Flashes during radio transmission. Active LOW. ADIO7 Programming I/F CW_1 Encoding input for wake-up cycle Configuration interface. Leave open or connect to GND. See 2.7.1. Internal pull-up SCSEDIO0 Programming I/F CW_0 Encoding input for wake-up cycle Configuration interface. Leave open or connect to GND. See 2.7.1. Internal pull-up SCLKDIO1 Programming I/F CP_1 Encoding input for retransmission Configuration interface. Leave open or connect to GND. See 2.7.1. Internal pull-up WSDADIO2 Programming I/F CP_0 Encoding input for retransmission Configuration interface. Leave open or connect to GND. See 2.7.1. Internal pull-up RSDADIO3 Programming I/F WAKE0 WAKE0 Wake input Change of logic state leads to wake-up and transmission of a telegram. Must be connected to UVDDext or GND! At time of delivery WAKE0 is connected to UVDDext via a jumper at the connector. See also 3.1. WAKE1 LRN LRN input Change of logic state to LOW leads to wake-up and transmission of teach-in tele-gram. Internal pull-up to UVDD. See also 2.7.2, 2.8.2, and 3.1. 2.3.1 Interface supply voltage The IOVDD pin of EO3000I is internally connected to DVDD. For digital communication with other circuitry therefore a voltage of 1.8 V has to be used. While the module is in deep sleep mode the microcontroller with all its peripherals is switched off and DVDD, IOVDD, and SWPWR are not supplied. If DVDD=0 V and IOVDD is not supplied (e.g. while in sleep mode), do not apply voltage to ADIO0 to ADIO7 and the pins of the serial interface (SCSEDIO0, SCLKDIO1, WSDADIO2, RSDADIO3). This may lead to unpredictable malfunction of the device. For I/O pins configured as analog pins the IOVDD voltage level is not relevant! See also 2.3.2.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 12/28 STM 31X / STM 31XC2.3.2 Analog and digital inputs Parameter Conditions / Notes Min Typ Max Units Analog Input Measurement range Single ended 0.05 RVDD-0.05 V Input coupling DC Measurement bandwidth 100 kHz Input resistance Single ended against RGND @ 1 kHz 10 MΩ Input capacitance Single ended against RGND @ 1 kHz 10 pF Effective measurement resolution Configurable, see 2.7.2 6 10 bit Relative measurement accuracy Related to the reference voltage within specified input range 0.6 % Digital Input Mode Input HIGH voltage 2/3 IOVDD V Input LOW voltage 1/3 IOVDD V Pull up resistor @IOVDD=1.7 … 1.9 V 90 132 200 kΩ 2.4 Absolute maximum ratings (non operating) Symbol Parameter Min Max Units VDD Supply voltage at VDD -0.5 5.5 V VGC Voltage gold cap 1.5 3.3 V VCHAR Supply voltage from external energy harvester 0 6 V GND Ground connection 0 0 V VINA Voltage at every analog input pin -0.5 2 V VIND Voltage at RESET, WAKE0/1, and every digital input -0.5 3.6 V 2.5 Maximum ratings (operating) Symbol Parameter Min Max Units VDD Supply voltage at VDD and VDDLIM 2.1 5.0 V VGC Voltage gold cap 1.5 3.3 V VCHAR Supply voltage from external energy harvester 0 6 V ICHAR Supply current from external energy harvester ContinuousShort term (<10 min) 50 1 µA mA GND Ground connection 0 0 V VINA Voltage at every analog input pin 0 2.0 V VIND Voltage at RESET, WAKE0/1, and every digital input 0 3.6 V
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 13/28 STM 31X / STM 31XC2.6 Power management and voltage regulators Symbol Parameter Conditions / Notes Min Typ Max UnitsVoltage Regulators VDDR Ripple on VDD, where Min(VDD) > VON 50 mVppUVDD Ultra Low Power supply 1.8 V RVDD RF supply Internal signal only 1.7 1.8 1.9 V DVDD Digital supply Internal signal only 1.7 1.8 1.9 V Threshold Detector VON Turn on threshold 2.3 2.45 2.6 V VOFF Turn off threshold Automatic shutdown if VDD drops below VOFF 1.85 1.9 2.1 V Threshold detector STM 31x provides an internal ultra low power ON/OFF threshold detector. If VDD > VON, it turns on the ultra low power regulator (UVDD), the watchdog timer and the WAKE# pins circuitry. If VDD ≤ VOFF it initiates the automatic shut down of STM 31x. For details of this mechanism please refer to the Dolphin Core Description documentation. 2.7 Configuration 2.7.1 Configuration via pins The encoding input pins have to be left open or connected to GND in correspondence with the following connection schemes. These settings are checked at every wake-up. Wake-up cycle time CW_0 CW_1 Wake-up cycle time NC GND 1 s ±20% GND NC 10 s ±20% NC NC 100 s ±20% GND GND No cyclic wake-up
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 14/28 STM 31X / STM 31XC Redundant retransmission Via CP_0 and CP_1 an internal counter is set which is decreased at every wake-up signal. Once the counter reaches zero the redundant retransmission signal is sent. CP_0 CP_1 Number of wake-ups that trigger a redundant retransmission GND NC Every timer wake-up signal NC NC Every 7th - 14th timer wake-up signal, affected at random NC GND Every 70th - 140th timer wake-up signal, affected at random GND GND No redundant retransmission A radio telegram is always transmitted after wake-up via WAKE pins! After transmission the counter is reset to a random value within the specified in-terval. According to FCC 15.231a) a redundant retransmission at every timer wake-up to determine the system integrity is only allowed in safety and security applications! In this case the total transmission time must not exceed two seconds per hour, which means that a combination with a 1 s wake-up cycle time is not allowed! If applied in other (non-safety, non-security) applications a minimum of 10 s be-tween periodic transmissions is required. In addition the device has to comply with the lower field strength limits of 15.231e). The limited modular approval of STM 31xC is not valid in this case.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 15/28 STM 31X / STM 31XC2.7.2 Configuration via serial interface Via the programming interface the configuration area can be modified. This provides a lot more configuration options. Values set via serial interface override hardware settings! These settings are read after RESET or power-on reset only and not at every wake-up of the module! The interface is shown in the figure below: Parameter Configuration via pins Configuration via serial interface Wake up cycle See section 2.7.1 Value can be set from 1 s to 65534 s Redundant Retransmission cycle See section 2.7.1 Min…Max values for random interval If Min=Max -> random switched off Threshold values for analog inputs (transmission of telegram if threshold value exceeded) No The default values are: 5 LSB at AD_1 input, 6 LSB at AD_0 and 14 LSB at AD_2. The threshold value can be set between 0 and full scale for every input individually. Resolution of the analog inputs No Default: AD_0: 8 bit, AD_1: 8 bit, AD_2: 8 bit Option: AD_0: 10 bit, AD_1: 6 bit, AD_2: 8 bit Input mask No A digital input mask for ignoring changes on digital input pins. At default all input bits are checked. Delay time between SWPWR on and sampling moment (for stabilization of external sensor measurement values) No Value can be set from 0 ms to 508 ms in steps of 2 ms. Default delay time is 2 ms. Source of AD_2 No Select if AD_2 contains measurement value of external ADIO2 pin or from internal VDD/4 Edge of wake pin change causing a telegram trans-mission No Every change of a wake pin triggers a wake-up. For both wake pins it can be configured indi-vidually if a telegram shall be sent on rising, falling or both edges. Manufacturer ID and EEP (EnOcean Equipment Profile) No Information about manufacturer and type of device. This feature is needed for “automatic” interoperability of sensors and actuators or bus systems. Unique manufacturer IDs are distrib-uted by the EnOcean Alliance. USB <=> SPIinterface SPIUSB Dolphin Studio, or EOP Reset PROG_EN ADIO7 SCSEDIO0 SCLKDIO1 WSDADIO2 RSDADIO3 STM31xVDD GND
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 16/28 STM 31X / STM 31XCEnOcean provides EOPx (EnOcean Programmer, a command line program) and Dolphin Stu-dio (Windows application for chip configuration, programming, and testing) and the USB/SPI programmer device as part of the EDK 300 developer´s kit. 2.8 Radio telegram 2.8.1 Normal operation Telegram content (seen at serial interface of RCM 130/TCM 3x0 or at DOLPHIN API): ORG = 0x07 (Telegram type “4BS”) Data_Byte1..3 3x8bit mode: DATA_BYTE3 = Value of AD_2 analog input DATA_BYTE2 = Value of AD_1 analog input DATA_BYTE1 = Value of AD_0 analog input 1x8bit, 1x6it, 1x10bit mode: DATA_BYTE3 = Value of AD_2 DATA_BYTE2 = Upper 2 bits of AD_0 and value of AD_1 DATA_BYTE1 = Lower 8 bits Value of AD_0 analog input DATA_BYTE0 = Digital sensor inputs as follows: Bit 7 Bit 0 Reserved, set to 0 DI_3=1 DI_2 DI_1 DI_0 ID_BYTE3 = module identifier (Byte3) ID_BYTE2 = module identifier (Byte2) ID_BYTE1 = module identifier (Byte1) ID_BYTE0 = module identifier (Byte0) DATA_BYTE3 DATA_BYTE2 DATA_BYTE1 AD_2 AD_1 AD_0 7 6 5 4 3 2 1 0 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 The voltages measured at the analog inputs can be calculated from these values as follows: U=(Value of AD_x)/(2n)x1.8 V n=resolution of channel in bit Please note the limitations in the measurement range of the A/D converter as shown in 2.3.2.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 17/28 STM 31X / STM 31XC2.8.2 Teach-in telegram In case of a wake-up via WAKE1 pin (LRN input) the module transmits a teach-in telegram.  If the manufacturer code is not set, the module transmits a normal telegram according to 2.8.1 with the difference that DI_3=0.  If a manufacturer code is set, this teach-in telegram contains special information as described below. With this special teach-in telegram it is possible to identify the manufacturer of a device and the function and type of a device. There is a list available from the EnOcean Alliance describing the functionalities of the respective products. ORG = 0x07 (Telegram type “4BS”) DATA_BYTE0..3 see below LRN Type = 1 LRN = 0 DI0..DI2: current status of digital inputs Profile, Type, Manufacturer-ID defined by manufacturer RE0..2: set to 0 ID_BYTE3 = module identifier (Byte3) ID_BYTE2 = module identifier (Byte2) ID_BYTE1 = module identifier (Byte1) ID_BYTE0 = module identifier (Byte0) ORG Data_Byte3 Data_Byte2 Data_Byte1 Data_Byte0 ID Function 6 Bit Type7 Bit Manufacturer-ID 11 Bit LRN Type1Bit RE21BitRE11BitRE01BitLRN 1Bit DI2 1Bit DI1 1Bit DI0 1Bit 2.9 Transmit timing The setup of the transmission timing allows avoiding possible collisions with data packages of other EnOcean transmitters as well as disturbances from the environment. With each transmission cycle, 3 identical subtelegrams are transmitted within 40 ms. The transmis-sion of a subtelegram lasts approximately 1.2 ms. The delay between the three transmis-sion bursts is affected at random. If a new wake-up occurs before all sub-telegrams have been sent, the series of transmissions is stopped and a new series of telegrams with new valid measure-ment values is transmitted.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 18/28 STM 31X / STM 31XC2.10 Charging circuitry The figure below shows the internal charging circuit. It is controlled via the WXODIO pin of EO3000I which switches according to the status of the internal threshold detector. For de-tails please refer to our Dolphin Core Description documentation. An external 3 V battery can be connected at VDD (STM 312 only) or at VGC. 2.11 Energy consumption Current Consumption of STM 31x Charge needed for one measurement and transmit cycle: ~130 µC Charge needed for one measurement cycle without transmit: ~30 µC (current for external sensor circuits not included) Calculations are performed on the basis of electric charges because of the internal linear voltage regulator of the module. Energy consumption varies with voltage of the energy storage while consumption of electric charge is constant. 0.000010.00010.0010.010.11101000 102030405060708090100Time [ms]C u rre n t [mA]
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 19/28 STM 31X / STM 31XCFrom these values the following performance parameters have been calculated: Wake cycle [s] Transmit interval Operation Time in darkness [h] when storage fully charged Required reload time [h] at 200 lux within 24 h for continuous operation 24 h operation after 6 h illumination at x lux Illumina-tion level in lux for continuous operation Current in µA required for con-tinuous operation1 1 0.5 storage too sm all storage too sm all 5220 130.51 10 1.7 storage too sm all storage too sm all 1620 40.51 100 2.1 storage too sm all storage too sm all 1250 31.310 1 5.1 storage too sm all storage too sm all 540 13.510 10 16 21 700 175 4.410 100 20 16.8 560 140 3.5100 1 43 7.8 260 65 1.6100 10 98 3.6 120 30 0.8100 100 112 3 100 25 0.6 Assumptions:  Internal storage PAS614L-VL3 with 0.25 F, Umax=3.2 V, Umin=2.2 V, T=25 °C  Consumption: Transmit cycle 100 µC, measurement cycle 30 µC  Pre-installed solar cell ECS 300, operating values 3 V and 5 µA @ 200 lux fluorescent light  Current proportional to illumination level (not true at very low levels!) These values are calculated values, the accuracy is about +/-20%!
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 20/28 STM 31X / STM 31XC3 APPLICATIONS INFORMATION 3.1 Using the WAKE pins The logic input circuits of the WAKE0 and WAKE1 pins are supplied by UVDD and therefore also usable in “Deep Sleep Mode”. Due to current minimization there is no internal pull-up or pull-down at the WAKE pins. When STM 31x is in “Deep Sleep Mode” and the logic levels of WAKE0 and / or WAKE1 is changed, STM 31x starts up. As the there is no internal pull-up or pull-down at the WAKE0 pin, it has to be en-sured by external circuitry, that the WAKE0 pin is at a defined logic level at any time. At time of delivery a jumper is connected between WAKE0 and UVDDext. WAKE1 provides an internal 1.8 MΩ pull-up. See figure below. When the LRN button is pressed WAKE1 is pulled to GND and a teach-in telegram is trans-mitted. As long as the button is pressed a small current of approximately 1 µA is flowing. It is possible to connect an additional external button in parallel between WAKE1 and GND if a different position of the button in the device is required. WAKE0 is connected to UVDDext via a jumper at time of delivery. If the module is mounted onto a host PCB the jumper has to be removed. The circuitry on the host PCB then has to ensure that WAKE0 is always in a defined position. There are two ways to use WAKE0:  Connect WAKE0 to UVDDext and connect an external button between WAKE0 and GND. As long as the button is pressed a current of 1 µA will flow.  Connect a 3 terminal switch and switch WAKE0 to either GND or UVDDext. In this case there is no continuous flow of current in either position of the switch. EO3000IWAKE0WAKE1UVDDUVDDextSTM 31xWAKE1WAKE0GND1M81M8LRN ButtonJumper installed at time of delivery
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 21/28 STM 31X / STM 31XCIf more digital inputs with WAKE functionality are needed in an application, WAKE0 can be combined with some of the digital inputs as shown below:
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 22/28 STM 31X / STM 31XC3.2 Antenna options 3.2.1 Whip antenna (STM 310, STM 310C, STM 312, STM 312C) Specification of the whip antenna; L=150 mm @ 315 MHz, L=86 mm @ 868 MHz Antenna layout recommendation: STM 31x without host PCB STM 31x with host PCB Glass, wood, concrete, metal868MHz: > 2cm315MHz: > 4cm868MHz: > 1cm315MHz: > 2cm868MHz: > 2cm315MHz: > 4cmHost PCBGND plane
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 23/28 STM 31X / STM 31XC 3.2.2 Helical antenna (STM 311, STM 311C) 868 MHz 315 MHz Antenna recommendation: STM 31x without host PCB STM 31x with host PCB Glass, wood, concrete, metal868MHz: > 2mm315MHz: > 4mm868MHz: > 5mm315MHz: > 10mmPlasticHost PCBGND plane
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 24/28 STM 31X / STM 31XC3.3 Transmission range The main factors that influence the system transmission range are type and location of the antennas of the receiver and the transmitter, type of terrain and degree of obstruction of the link path, sources of interference affecting the receiver, and “Dead” spots caused by signal reflections from nearby conductive objects. Since the expected transmission range strongly depends on this system conditions, range tests should categorically be performed before notification of a particular range that will be attainable by a certain application. The following figures for expected transmission range are considered by using a PTM, a STM or a TCM radio transmitter device and the TCM radio receiver device with preinstalled whip antenna and may be used as a rough guide only:  Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls  Plasterboard walls / dry wood: Typically 30 m range, through max. 5 walls  Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls  Ferroconcrete walls / ceilings: Typically 10 m range, through max. 1 ceiling  Fire-safety walls, elevator shafts, staircases and supply areas should be considered as screening. The angle at which the transmitted signal hits the wall is very important. The effective wall thickness – and with it the signal attenuation – varies according to this angle. Signals should be transmitted as directly as possible through the wall. Wall niches should be avoided. Other factors restricting transmission range:  Switch mounted on metal surfaces (up to 30% loss of transmission range)  Hollow lightweight walls filled with insulating wool on metal foil  False ceilings with panels of metal or carbon fiber  Lead glass or glass with metal coating, steel furniture The distance between EnOcean receivers and other transmitting devices such as com-puters, audio and video equipment that also emit high-frequency signals should be at least 0.5 m A summarized application note to determine the transmission range within buildings is available as download from www.enocean.com.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 25/28 STM 31X / STM 31XC4 AGENCY CERTIFICATIONS The modules have been tested to fulfil the approval requirements for CE (STM 31x) and FCC/IC (STM 31xC) based on the built-in firmware. When developing customer specific firmware based on the API for this module, special care must be taken not to exceed the specified regulatory limits, e.g. the duty cycle limitations! 4.1 CE Approval The STM 31x module bears the EC conformity marking CE and conforms to the R&TTE EU-directive on radio equipment. The assembly conforms to the European and national re-quirements of electromagnetic compatibility. The conformity has been proven and the ac-cording documentation has been deposited at EnOcean. The modules can be operated with-out notification and free of charge in the area of the European Union and in Switzerland.  EnOcean RF modules must not be modified or used outside their specifica-tion limits.  EnOcean RF modules may only be used to transfer digital or digitized data. Analog speech and/or music are not permitted.  EnOcean RF modules must not be used with gain antennas, since this may result in allowed ERP or spurious emission levels being exceeded.  The final product incorporating EnOcean RF modules must itself meet the essential requirement of the R&TTE Directive and a CE marking must be af-fixed on the final product and on the sales packaging each. Operating in-structions containing a Declaration of Conformity has to be attached.  If the STM 31x transmitter is used according to the regulations of the 868.3 MHz band, a so-called “Duty Cycle” of 1% per hour must not be exceeded. Permanent transmitters such as radio earphones are not allowed.  The module must be used with only the following approved antenna(s). Model TypeSTM 310 STM 312 Pre-installed Wire/Monopole STM 311 Pre-installed helical antenna
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 26/28 STM 31X / STM 31XC4.2 FCC (United States) certification STM 31xC LIMITED MODULAR APPROVAL This is an RF module approved for Limited Modular use operating as an intentional trans-mitting device with respect to 47 CFR 15.231(a-c) and is limited to OEM installation. The module is optimized to operate using small amounts of harvested energy, such as can be collected by a small solar cell exposed to ambient light. The module transmits short radio packets comprised of control signals, (in some cases the control signal may be accompa-nied with data) such as those used with alarm systems, door openers, remote switches, and the like. The module does not support continuous streaming of voice, video, or any other forms of streaming data; it sends only short packets containing control signals and possibly data and is typically powered by a solar cell in ambient light. The module is de-signed to comply with, has been tested according to 15.231(a-c), and has been found to comply with each requirement. Thus, a finished device containing the STM 31xC radio mod-ule can be operated in the United States without additional Part 15 FCC approval (ap-proval(s) for unintentional radiators may be required for the OEM’s finished product), under EnOcean’s FCC ID number. This greatly simplifies and shortens the design cycle and devel-opment costs for OEM integrators. The module can be triggered manually or automatically, which cases are described below. Manual Activation The radio module can be configured to transmit a short packetized control signal if triggered manually. The module can be triggered, by pressing a switch, for example. The packet contains one (or more) control signals that is(are) intended to control something at the receiving end. The packet may also contain data. Depending on how much energy is available from the energy source, subsequent manual triggers can initiate the transmission of additional control signals. This may be necessary if prior packet(s) was (were) lost to fading or interference. Subsequent triggers can also be initiated as a precaution if any doubt exists that the first packet didn’t arrive at the receiver. Each packet that is transmitted, regardless of whether it was the first one or a subsequent one, will only be transmitted if enough energy is available from the energy source. Automatic Activation The radio module also can be configured to transmit a short packetized control sig-nal if triggered automatically, by a relevant change of its inputs, for example. Again, the packet contains a control signal that is intended to control something at the re-ceiving end and may also contain data. As above, it is possible for the packet to get lost and never reach the receiver. However, if enough energy is available from the energy source, and the module has been configured to do so, then another packet or packets containing the control signal may be transmitted at a later, unpredictable time.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 27/28 STM 31X / STM 31XCOEM Requirements In order to use EnOcean’s FCC ID number, the OEM must ensure that the following condi-tions are met.  End users of products, which contain the module, must not have the ability to alter the firmware that governs the operation of the module. The agency grant is valid only when the module is incorporated into a final product by OEM integrators.  The end-user must not be provided with instructions to remove, adjust or install the module.  The Original Equipment Manufacturer (OEM) must ensure that FCC labeling requirements are met. This includes a clearly visible label on the outside of the final product. Attaching a label to a removable portion of the final product, such as a battery cover, is not per-mitted. The label must include the following text: STM 310C, STM 312C: Contains FCC ID: SZV-STM310C The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (i.) this device may not cause harmful interference and (ii.) this device must accept any interference received, including interference that may cause undesired operation. STM 311C: Contains FCC ID: SZV-STM311C The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (i.) this device may not cause harmful interference and (ii.) this device must accept any interference received, including interference that may cause undesired operation. When the device is so small or for such use that it is not practicable to place the state-ment above on it, the information required by this paragraph shall be placed in a promi-nent location in the instruction manual or pamphlet supplied to the user or, alterna-tively, shall be placed on the container in which the device is marketed. However, the FCC identifier or the unique identifier, as appropriate, must be displayed on the device. The user manual for the end product must also contain the text given above.  Changes or modifications not expressly approved by EnOcean could void the user's au-thority to operate the equipment.  The OEM must ensure that timing requirements according to 47 CFR 15.231(a-c) are met.  The OEM must sign the OEM Limited Modular Approval Agreement with EnOcean  The module must be used with only the following approved antenna(s).
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 31x / STM 31xC User Manual V0.6 | Page 28/28 STM 31X / STM 31XC 4.3 IC (Industry Canada) certification In order to use EnOcean’s IC number, the OEM must ensure that the following conditions are met:  Labeling requirements for Industry Canada are similar to those required by the FCC. The Original Equipment Manufacturer (OEM) must ensure that IC labeling requirements are met. A clearly visible label on the outside of a non-removable part of the final product must include the following text: STM 310C, STM 312C: Contains IC: 5713A-STM310C STM 311C Contains IC: 5713A-STM311C  The OEM must sign the OEM Limited Modular Approval Agreement with EnOcean Model TypeGain STM 310C STM 312C Pre-installed Wire/Monopole 1.0 dBi STM 311C Pre-installed helical antenna -9 dBi
USER MANUAL V0.6 EnOcean GmbH Kolpingring 18a 82041 Oberhaching Germany Phone +49.89.67 34 689-0 Fax +49.89.67 34 689-50 info@enocean.com www.enocean.com Subject to modifications STM 320 / STM 320C / STM 321C User Manual V0.6 September 10, 2010 12:06 PM Patent protected: WO98/36395, DE 100 25 561, DE 101 50 128, WO 2004/051591, DE 103 01 678 A1, DE 10309334, WO 04/109236, WO 05/096482, WO 02/095707, US 6,747,573, US 7,019,241 Observe precautions! Electrostatic sensitive devices! Scavenger Transmitter Module STM 320 / STM 320C / STM 321C September 10, 2010
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 2/15 STM 320 / STM 320C / STM 321C REVISION HISTORY The following major modifications and improvements have been made to the first version of this document: No Major Changes 0.5 Initial version 0.6 New drawings added; new energy consumption data added; application note for connecting an external battery added; Agency certifications added Published by EnOcean GmbH, Kolpingring 18a, 82041 Oberhaching, Germany www.enocean.com, info@enocean.com, phone ++49 (89) 6734 6890 © EnOcean GmbH All Rights Reserved Important! This information describes the type of component and shall not be considered as assured characteris-tics. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the EnOcean web-site: http://www.enocean.com. As far as patents or other rights of third parties are concerned, liability is only assumed for modules, not for the described applications, processes and circuits. EnOcean does not assume responsibility for use of modules described and limits its liability to the replacement of modules determined to be defective due to workmanship. Devices or systems contain-ing RF components must meet the essential requirements of the local legal authorities. The modules must not be used in any relation with equipment that supports, directly or indirectly, human health or life or with applications that can result in danger for people, animals or real value. Components of the modules are considered and should be disposed of as hazardous waste. Local government regulations are to be observed. Packing: Please use the recycling operators known to you. By agreement we will take packing mate-rial back if it is sorted. You must bear the costs of transport. For packing material that is returned to us unsorted or that we are not obliged to accept, we shall have to invoice you for any costs incurred.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 3/15 STM 320 / STM 320C / STM 321C TABLE OF CONTENT 1 GENERAL DESCRIPTION................................................................................. 4 1.1 Basic functionality ......................................................................................... 4 1.2 Technical data .............................................................................................. 4 1.3 Physical dimensions....................................................................................... 5 1.4 Environmental conditions ............................................................................... 7 1.5 Ordering Information ..................................................................................... 7 2 FUNCTIONAL DESCRIPTION............................................................................ 8 2.1 Block diagram............................................................................................... 8 2.2 Radio telegram ............................................................................................. 8 2.3 Transmit timing ............................................................................................ 9 2.4 Energy consumption ...................................................................................... 9 3 APPLICATIONS INFORMATION ...................................................................... 10 3.1 Helical antenna ........................................................................................... 10 3.2 Transmission range ..................................................................................... 11 3.3 Connecting an external battery ..................................................................... 11 4 AGENCY CERTIFICATIONS (after release for series production) ......................... 12 4.1 CE Approval................................................................................................ 12 4.2 FCC (United States) certification ................................................................... 13 4.3 IC (Industry Canada) certification.................................................................. 15
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 4/15 STM 320 / STM 320C / STM 321C 1 GENERAL DESCRIPTION 1.1 Basic functionality The radio transmitter module STM 320 from EnOcean enables the implementation of a wireless magnet contact sensor. Powered by a solar cell it works absolutely maintenance-free. An integrated energy store allows operation for several days even in total darkness. Key applications are window and door sensors. The STM 320 supervises an integrated reed contact and reports every status change immediately (open<>closed). In addition a sign of life signal is transmitted every 20-30 minutes. A LRN button is pre-installed on the PCB. When this button is pressed a special teach-in signal is sent. There are two frequency variants – STM 320 in 868 MHz and STM 320C in 315 MHz. STM 321C provides a connector for an external reed contact instead of the internal reed contact. Features with built-in firmware  Pre-installed solar cell  On-board energy storage and charging circuit  On-board LRN button  On-board TX indicator LED  On-board reed contact 1.2 Technical data Antenna Pre-installed helical antenna installed Frequency 315.0 MHz (STM 32xC)/868.3 MHz (STM 320)Radio Standard EnOcean 868 MHz/315 MHzData rate/Modulation type 125 kbps/ASKConducted Output Power typ. 2 dBmPower Supply Pre-installed solar cellIllumination 50-100000 luxInitial operation time in darkness @ 25°C typ. 6 days, energy storage fully charged transmission of telegram every 25 min on average1Operation start up time with empty energy store typ. 2.5 min @ 400 lux / 25°C incandescent or fluorescent lightReed contact 1x internal, type Meder MK01-IRadio Regulations R&TTE EN 300 220 (STM 320)FCC CFR-47 Part 15 (STM 32xC) 1Full performance of the PAS614L energy storage is achieved after a few days of operation at good illumination level. Performance degrades over life time, especially if energy storage is exposed to higher temperatures. Each 10K drop in temperature doubles the expected life span.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 5/15 STM 320 / STM 320C / STM 321C 1.3 Physical dimensions PCB dimensions 43±0.2 x 16±0.3 x 1±0.1 mm Module height 9 mmWeight 5.0g (STM 320), 6.3 g (STM 320C)
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 6/15 STM 320 / STM 320C / STM 321C
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 7/15 STM 320 / STM 320C / STM 321C 1.4 Environmental conditions Operating temperature -20 °C … +60 °CStorage temperature -20 °C … +60 °CHumidity 0% … 93% r.h., non-condensing 1.5 Ordering Information Type Ordering Code Frequency STM 320 S3001-D320 868.3 MHz STM 320C S3031-D320 315.0 MHz STM 321C 315.0 MHz
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 8/15 STM 320 / STM 320C / STM 321C 2 FUNCTIONAL DESCRIPTION 2.1 Block diagram A change of the reed contact status or pushing the LRN button will wake the transmitter unit to send a radio telegram immediately (reed contact position, LRN push button status, unique 32-bit sensor ID, checksum). In addition a redundant retransmission signal is sent to announce the contact status even in case of no input signal changes. This signal trans-mitted every 20-30 min, affected at random. The transmit indicator LED flashes briefly at every radio transmission. Between the wake-up phases, the device is in sleep mode for minimum power consump-tion. 2.2 Radio telegram STM 320 transmits a radio telegram according to EnOcean Equipment Profile EEP 06-00-01 as defined in the EnOcean Equipment Profiles 2.0 specification. http://www.enocean-alliance.org/fileadmin/redaktion/enocean_alliance/pdf/EnOcean_Equipment_Profiles_2.0.pdf Helical antennaBALUNSpontaneous wake-upPower management MicroControllerRF Transmitter868.3 MHz (STM320)315.0 MHz (STM320C)DOLPHINEO3000I16MHz OscillatorEnergyStorageSolar CellLRN buttonTransmitIndicatorReedcontact
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 9/15 STM 320 / STM 320C / STM 321C 2.3 Transmit timing The setup of the transmission timing allows avoiding possible collisions with data packages of other EnOcean transmitters as well as disturbances from the environment. With each transmission cycle, 3 identical subtelegrams are transmitted within 40 ms. The transmis-sion of a subtelegram lasts approximately 1.2 ms. The delay between the three transmis-sion bursts is affected at random. 2.4 Energy consumption Charge needed for one measurement and transmit cycle: ~80 µC Charge needed for one measurement cycle without transmit: ~10 µC Calculations are performed on the basis of electric charges because of the internal linear voltage regulator of the module. Energy consumption varies with voltage of the energy storage while consumption of electric charge is constant. From these values the following performance parameters have been calculated: Wake and transmit cycle [s] Operation Time in darkness [h] when storage fully charged Required reload time [h] at 200 lux within 24 h for continuous operation 1500 175 1.8 Assumptions:  Internal storage PAS614L-VL3 with 0.25 F, Umax=3.2 V, Umin=2.3 V, T=25 °C  Consumption: Transmit cycle 80 µC, measurement cycle 10 µC  Pre-installed solar cell ECS 300, operating values 3 V and 5 µA @ 200 lux fluorescent light  Current proportional to illumination level (not true at very low levels!) These values are calculated values, the accuracy is about +/-20%! 0.000010.00010.0010.010.11101000 102030405060708090100Time [ms]C urrent [mA]
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 10/15 STM 320 / STM 320C / STM 321C 3 APPLICATIONS INFORMATION 3.1 Helical antenna 868 MHz 315 MHz Antenna recommendation: STM 320 without host PCB STM 320 with host PCB Glass, wood, concrete, metal868MHz: > 2mm315MHz: > 4mm868MHz: > 5mm315MHz: > 10mmPlasticHost PCBGND plane
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 11/15 STM 320 / STM 320C / STM 321C 3.2 Transmission range The main factors that influence the system transmission range are type and location of the antennas of the receiver and the transmitter, type of terrain and degree of obstruction of the link path, sources of interference affecting the receiver, and “Dead” spots caused by signal reflections from nearby conductive objects. Since the expected transmission range strongly depends on this system conditions, range tests should categorically be performed before notification of a particular range that will be attainable by a certain application. The following figures for expected transmission range are considered by using a PTM, a STM or a TCM radio transmitter device and the TCM radio receiver device with preinstalled whip antenna and may be used as a rough guide only:  Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls  Plasterboard walls / dry wood: Typically 30 m range, through max. 5 walls  Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls  Ferroconcrete walls / ceilings: Typically 10 m range, through max. 1 ceiling  Fire-safety walls, elevator shafts, staircases and supply areas should be considered as screening. The angle at which the transmitted signal hits the wall is very important. The effective wall thickness – and with it the signal attenuation – varies according to this angle. Signals should be transmitted as directly as possible through the wall. Wall niches should be avoided. Other factors restricting transmission range:  Switch mounted on metal surfaces (up to 30% loss of transmission range)  Hollow lightweight walls filled with insulating wool on metal foil  False ceilings with panels of metal or carbon fiber  Lead glass or glass with metal coating, steel furniture The distance between EnOcean receivers and other transmitting devices such as com-puters, audio and video equipment that also emit high-frequency signals should be at least 0.5 m A summarized application note to determine the transmission range within buildings is available as download from www.enocean.com. 3.3 Connecting an external battery In case there is not sufficient light available for operation with solar cell an external 3 V Lithium battery can be connected to the module at the soldering pads shown below: EnergyStoreLR NR eed+ 3VGNDGND
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 12/15 STM 320 / STM 320C / STM 321C 4 AGENCY CERTIFICATIONS (after release for series production) The modules have been tested to fulfil the approval requirements for CE (STM 320) and FCC/IC (STM 320C) based on the built-in firmware. When developing customer specific firmware based on the API for this module, special care must be taken not to exceed the specified regulatory limits, e.g. the duty cycle limitations! 4.1 CE Approval The STM 320 module bears the EC conformity marking CE and conforms to the R&TTE EU-directive on radio equipment. The assembly conforms to the European and national re-quirements of electromagnetic compatibility. The conformity has been proven and the ac-cording documentation has been deposited at EnOcean. The modules can be operated with-out notification and free of charge in the area of the European Union and in Switzerland.  EnOcean RF modules must not be modified or used outside their specifica-tion limits.  EnOcean RF modules may only be used to transfer digital or digitized data. Analog speech and/or music are not permitted.  EnOcean RF modules must not be used with gain antennas, since this may result in allowed ERP or spurious emission levels being exceeded.  The final product incorporating EnOcean RF modules must itself meet the essential requirement of the R&TTE Directive and a CE marking must be af-fixed on the final product and on the sales packaging each. Operating in-structions containing a Declaration of Conformity has to be attached.  If the STM 320 transmitter is used according to the regulations of the 868.3 MHz band, a so-called “Duty Cycle” of 1% per hour must not be exceeded. Permanent transmitters such as radio earphones are not allowed.  The module must be used with only the following approved antenna(s). Model TypeSTM 320 Pre-installed helical antenna
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 13/15 STM 320 / STM 320C / STM 321C 4.2 FCC (United States) certification STM 320C LIMITED MODULAR APPROVAL This is an RF module approved for Limited Modular use operating as an intentional trans-mitting device with respect to 47 CFR 15.231(a-c) and is limited to OEM installation. The module is optimized to operate using small amounts of harvested energy from a small solar cell exposed to ambient light. The module transmits short radio packets comprised of con-trol signals, (in some cases the control signal may be accompanied with data) such as those used with alarm systems, door openers, remote switches, and the like. The module does not support continuous streaming of voice, video, or any other forms of streaming data; it sends only short packets containing control signals and possibly data and is pow-ered by a solar cell in ambient light. The module is designed to comply with, has been tested according to 15.231(a-c), and has been found to comply with each requirement. Thus, a finished device containing the STM 320C radio module can be operated in the United States without additional Part 15 FCC approval (approval(s) for unintentional radia-tors may be required for the OEM’s finished product), under EnOcean’s FCC ID number. This greatly simplifies and shortens the design cycle and development costs for OEM inte-grators. The module can be triggered manually or automatically, which cases are described below. Manual Activation The radio module can be configured to transmit a short packetized control signal if triggered manually. The module can be triggered, by pressing a button, for example. The packet contains one (or more) control signals that is(are) intended to control something at the receiving end. The packet may also contain data. Depending on how much energy is available from the energy source, subsequent manual triggers can initiate the transmission of additional control signals. This may be necessary if prior packet(s) was (were) lost to fading or interference. Subsequent triggers can also be initiated as a precaution if any doubt exists that the first packet didn’t arrive at the receiver. Each packet that is transmitted, regardless of whether it was the first one or a subsequent one, will only be transmitted if enough energy is available from the energy source. Automatic Activation The radio module also can be configured to transmit a short packetized control sig-nal if triggered automatically, by a relevant change of its inputs, for example. Again, the packet contains a control signal that is intended to control something at the re-ceiving end and may also contain data. As above, it is possible for the packet to get lost and never reach the receiver. However, if enough energy is available from the energy source, and the module has been configured to do so, then another packet or packets containing the control signal may be transmitted at a later, unpredictable time.
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 14/15 STM 320 / STM 320C / STM 321C OEM Requirements In order to use EnOcean’s FCC ID number, the OEM must ensure that the following condi-tions are met.  End users of products, which contain the module, must not have the ability to alter the firmware that governs the operation of the module. The agency grant is valid only when the module is incorporated into a final product by OEM integrators.  The end-user must not be provided with instructions to remove, adjust or install the module.  The Original Equipment Manufacturer (OEM) must ensure that FCC labeling requirements are met. This includes a clearly visible label on the outside of the final product. Attaching a label to a removable portion of the final product, such as a battery cover, is not per-mitted. The label must include the following text: Contains FCC ID: SZV-STM311C The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (i.) this device may not cause harmful interference and (ii.) this device must accept any interference received, including interference that may cause undesired operation. When the device is so small or for such use that it is not practicable to place the state-ment above on it, the information required by this paragraph shall be placed in a promi-nent location in the instruction manual or pamphlet supplied to the user or, alterna-tively, shall be placed on the container in which the device is marketed. However, the FCC identifier or the unique identifier, as appropriate, must be displayed on the device. The user manual for the end product must also contain the text given above.  Changes or modifications not expressly approved by EnOcean could void the user's au-thority to operate the equipment.  The OEM must ensure that timing requirements according to 47 CFR 15.231(a-c) are met.  The OEM must sign the OEM Limited Modular Approval Agreement with EnOcean  The module must be used with only the following approved antenna(s). Model Type GainSTM 320C STM 321C Pre-installed helical antenna -9 dBi
USER MANUAL V0.6 © 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 15/15 STM 320 / STM 320C / STM 321C 4.3 IC (Industry Canada) certification Contains IC: 5713A-STM311C  The OEM must sign the OEM Limited Modular Approval Agreement with EnOcean

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