EnOcean STM320U 902.875 MHz transmitter User Manual users manual

EnOcean GmbH 902.875 MHz transmitter users manual

users manual

USER MANUAL V1.05
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 320U User Manual
V1.05
April 26, 2013 8:59 AM
Page 1/18
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 320U
April 26, 2013
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
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
0.90
New drawings added; new energy consumption data added; application note for
connecting an external battery added; Agency certifications added; new charging
circuitry added; editorial changes
0.95
Editorial changes
0.99
Pin for connection of backup battery changed; section 3.4 inserted; drawings up-
dated
1.00
Drawing updated
1.02
Remark added in 3.4; additional remarks in 2.4; label information modified in
chapter 5; Shelf life added in 1.4; Conducted output power replaced by radiated
output power in 1.2; other editorial changes
1.03
Duration of a sub-telegram corrected to 0.9ms in 2.3;
1.04
Specification of shelf life improved. Chapter Related Documents added
1.05
STM 320U 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.
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
TABLE OF CONTENT
1 RELATED DOCUMENTS ................................................................................... 4
2 GENERAL DESCRIPTION ................................................................................. 4
2.1 Basic functionality ......................................................................................... 4
2.2 Technical data ............................................................................................... 4
2.3 Physical dimensions ....................................................................................... 5
2.4 Environmental conditions ............................................................................... 7
2.5 Ordering Information ..................................................................................... 7
3 FUNCTIONAL DESCRIPTION ............................................................................ 8
3.1 Block diagram ............................................................................................... 8
3.2 Radio telegram .............................................................................................. 8
3.3 Transmit timing ............................................................................................. 8
3.4 Energy consumption ...................................................................................... 9
4 APPLICATIONS INFORMATION ....................................................................... 10
4.1 Helical antenna ........................................................................................... 10
4.2 Transmission range ..................................................................................... 11
4.3 Connecting an external backup battery .......................................................... 11
4.4 Mounting STM 320 into a housing .................................................................. 12
5 AGENCY CERTIFICATIONS ............................................................................ 13
5.1 CE Approval ................................................................................................ 13
5.2 FCC (United States) certification .................................................................... 14
5.3 IC (Industry Canada) certification .................................................................. 16
5.4 FCC Regulatory Statements ......................................................................... 17
5.5 Industry Canada Regulatory Statements ........................................................ 17
6 Label Information ........................................................................................ 18
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
1 RELATED DOCUMENTS
For mechanical integration please refer to our 3D drawings found at
http://www.enocean.com/en/enocean_modules/stm-320/
2 GENERAL DESCRIPTION
2.1 Basic functionality
The radio transmitter module STM 320 from EnOcean
enables the implementation of a wireless magnet con-
tact 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 but-
ton is pressed a special teach-in signal is sent.
There are three frequency variants – STM 320 in 868 MHz, STM 320C in 315 MHz,
and STM 320U in 902MHz.
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
2.2 Technical data
Antenna
Pre-installed helical antenna installed
Frequency
315.0 MHz (STM 320C)
868.3 MHz (STM 320)
902.875MHz (STM 320U)
Radio Standard
EnOcean 902MHz/868 MHz/315 MHz
Data rate/Modulation type
125 kbps/ASK(868MHz, 315MHz) FSK(902MHz)
Radiated Output Power
STM 320: +5 dBm1 (EIRP) ± 2.5 dB2
STM 320C: +92 dBµV/m1 ± 2 dB2
STM 320U: +99 dBµV/m1 ± 2 dB2
Power Supply
Pre-installed solar cell
Illumination 50-100000 lux
Initial operation time in
darkness @ 25°C
typ. 6 days, min 90 hours
if energy storage fully charged
transmission of telegram every 25 min on average3
1 Measured in test laboratory, measurement uncertainty 2.7 dB
2 Tolerance of measurement in production at 50 Ω
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
Operation start up time with empty
energy store
typ. 2.5 min @ 400 lux / 25°C
incandescent or fluorescent light
Reed contact
1x internal, Meder MK23-90-BV14496 or MK01-I
Radio Regulations
R&TTE EN 300 220 (STM 320)
FCC CFR-47 Part 15 (STM 320C, STM 320U)
2.3 Physical dimensions
3 Full performance of the PAS614L energy storage is achieved after several days of opera-
tion (up to two weeks) at good illumination level. Performance degrades over life time, es-
pecially if energy storage is exposed to higher temperatures. Each 10 K drop in tempera-
ture doubles the expected life span.
PCB dimensions 43±0.2 x 16±0.3 x 1±0.1 mm
Module height 6 mm
Weight 5.2 g (STM 320), 6.5 g (STM 320C), 5.2 g (STM 320U)
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
STM 320 / STM 320U
STM 320C
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
2.4 Environmental conditions
Operating temperature -20 °C … +60 °C
Storage temperature -20 °C … +60 °C, recommended4: +10 °C…+30 °C, <60%r.h.
Shelf life (in absolute darkness) 36 months after delivery5
Humidity 0% … 93% r.h., non-condensing
2.5 Ordering Information
Type
Ordering Code
Frequency
STM 320
S3001-D320
868.3 MHz
STM 320C
S3031-D320
315.0 MHz
STM 320U
S3051-D320
902.875 MHz
4 Recommended for maximum life of energy storage capacitor
5 Deep discharge of the PAS614L energy storage leads to degradation of performance.
Therefore products have to be taken into operation after 36 months. At least the PAS614L
needs to be recharged to 2.1 V.
The module shall not be placed on conductive materials, to prevent discharge of
the internal energy storages5. Even materials such as conductive foam (ESD pro-
tection) may have negative impact.
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
3 FUNCTIONAL DESCRIPTION
3.1 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.
3.2 Radio telegram
STM 320 transmits a radio telegram according to EnOcean Equipment Profile
EEP D5-00-01 as defined in the EnOcean Equipment Profiles 2.1 specification.
http://www.enocean-alliance.org/fileadmin/redaktion/enocean_alliance/pdf/EnOcean_Equipment_Profiles_EEP2.1.pdf
3.3 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 0.9 ms. The delay between the three transmis-
sion bursts is affected at random.
Helical antenna
BALUN
Spontaneous
wake-up
Power management Micro
Controller
RF Transmitter
868.3 MHz (STM 320)
315.0 MHz (STM 320C)
902.875 MHz (STM 320U)
DOLPHIN
EO3000I
16MHz Oscillator
Energy
Storage
Solar Cell
LRN button
Transmit
Indicator
Reed
contact
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
3.4 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 typical performance parameters at room temperature 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 (after several days of operation at good illumination
level) 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, the accuracy is about +/-20%! The performance varies over
temperature and may be strongly reduced at extreme temperatures.
0.00001
0.0001
0.001
0.01
0.1
1
10
100
010 20 30 40 50 60 70 80 90 100
Time [ms]
Current [mA]
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
4 APPLICATIONS INFORMATION
4.1 Helical antenna
868 MHz / 902 MHz
315 MHz
Antenna recommendation:
STM 320 without host PCB STM 320 with host PCB
Host PCB
GND plane
Glass, wood, concrete, metal
868/902 MHz: > 2 mm
315 MHz: > 4 mm
868/902 MHz: > 5 mm
315 MHz: > 10 mm
Plastic
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
4.2 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
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 comput-
ers, 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.
4.3 Connecting an external backup battery
In case there is not sufficient light available for operation with solar cell an external 3 V
Lithium backup battery can be connected to the module at the soldering pads shown below:
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
4.4 Mounting STM 320 into a housing
The figure below shows an example of a housing in which the module can be mounted (with
antenna pointing to the left). Design data of the housing and the modules is available in
.igs format.
Please make sure not to exert shear force (side force within the plane of the solar
cell) onto the solar cell! The maximum vertical force onto the solar cell must not
exceed 4 N and should be homogeneously distributed! Bending of the PCB must be
avoided!
Please make sure that the housing covers 0.5 mm at the solar cell edges. Within
0.5 mm off the edge flaking is possible due to the cutting process.
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
5 AGENCY CERTIFICATIONS
The modules have been tested to fulfil the approval requirements for CE (STM 320) and
FCC/IC (STM 320C / STM 320U) 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!
5.1 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
Type
STM 320
Pre-installed helical antenna
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
5.2 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 po-
wered 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 / STM 320U radio module can be operated
in the United States without additional Part 15 FCC approval (approval(s) for unintentional
radiators may be required for the OEM’s finished product), under EnOcean’s FCC ID num-
ber. This greatly simplifies and shortens the design cycle and development 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 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 al-
so 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 V1.05
STM 320 / STM 320C / STM 320U
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:
STM 320C
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.
STM 320U
Contains FCC ID: SZV-STM320U
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, alternative-
ly, 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
Gain
STM 320C
Pre-installed helical antenna
-9 dBi
STM 320U
Pre-installed helical antenna
-2 dBi
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
5.3 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 320C:
Contains IC: 5713A-STM311C
STM 320U:
Contains IC: 5713A-STM320U
The OEM must sign the OEM Limited Modular Approval Agreement with EnOcean
Pour utiliser le numéro IC EnOcean, le OEM doit s'assurer que les conditions suivantes sont
remplies:
Les exigences d'étiquetage pour Industrie Canada sont similaires à ceux exigés par la
FCC. Le fabricant d'équipement d'origine (OEM) doit s'assurer que les exigences en
matière d'étiquetage IC sont réunies. Une étiquette clairement visible à l'extérieur d'une
partie non amovible du produit final doit contenir le texte suivant:
STM 320C:
Contains IC: 5713A-STM311C
Contient le module d'émission IC: 5713A-STM311C
STM 320U:
Contains IC: 5713A-STM320U
Contient le module d'émission IC: 5713A-STM320U
L'OEM doit signer l'accord OEM limitée Approbation modulaire avec EnOcean
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
5.4 FCC Regulatory Statements
This device complies with part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired opera-
tion. Any changes or modifications not expressly approved by manufacturer could void the
user’s authority to operate the equipment.
IMPORTANT! Any changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate this equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equip-
ment generates, uses and can radiate radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful interference to radio communica-
tions. However, there is no guarantee that interference will not occur in a particular instal-
lation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
Consult the dealer or an experienced radio/ TV technician for help.
5.5 Industry Canada Regulatory Statements
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation of the device.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils
radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: (1)
l’appareil ne doit pas produire de brouillage, et (2) l’utilisateur de l’appareil doit accepter
tout brouillage radioélectrique subi, meme si le brouillage est susceptible d’en compromet-
tre le fonctionnement.
IMPORTANT! Tous les changements ou modifications pas expressément approuvés par la
partie responsable de la conformité ont pu vider l’autorité de l’utilisateur pour actioner cet
équipment.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada
USER MANUAL V1.05
STM 320 / STM 320C / STM 320U
6 Label Information
FCC ID
Product
variant
Revision
Date Code
(ww/YY)
IC ID

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