G Lufft Mess Und Regeltechnik Gmbh IPS137 24GHz Radar Sensor User Manual

G. Lufft Mess-Und Regeltechnik Gmbh 24GHz Radar Sensor

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IPS137 User Manual

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Annex No.5 Users Manual IPS-137

Manual R²S Radar Rain Sensor Version V5 (6/2007)

Manual R²S Table of contents 1 GENERAL REMARKS 3 2 BLOCK DIAGRAM 4 3 OUTPUTS UOUT_1 AND UOUT_2 5 4 COMMISSIONING THE R²S 7 5 CHANGING THE CONFIGURATION 9 6 RS485 PROTOCOL 17 6.1 TELEGRAM SETUP 17 6.2 PHYSICAL CONDITIONS 17 6.3 QUERY OF SENSOR DATA AS A BLOCK (CMD = 0X03) 18 7 DECLARATION OF CONFORMITY 19 Page 2 of 19

Manual R²S 1 General remarks Nowadays, a precipitation measurement can be based on different principles. In addition to the classical tipping bucket, the meteorological sector turns more and more towards differential weight measurement. The predominant principle in the traffic meteorology is measurement by light barrier. The new Radar Rain Sensor (R²S) from Lufft works with a 24GHz Doppler radar, which is used for measuring the speed of precipitation droplets. Based on the correlation between size and speed of the drops the precipitation quantity is calculated. The R²S is characterized by the following features: • Maintenance free precipitation sensor • Differentiation of rain / snow • Determination of quantity (Resolution 1mm, 0.1mm, 0.01mm can be selected) • Interface: RS485 (half duplex) and 2 digital outputs • Can be configured for replacing an IRSS88 • Can be configured for replacing tipping bucket systems Important: Precipitation consisting of tiny rain drops or dry snow are not always measured reliably due to a very low back-scattering factor. You may find more technical details in the internet on: http://www.lufft.com Page 3 of 19

Manual R²S 2 Block diagram Rain 24GHz Radar Controller heating (electrically isolated) A_heat B_heat power supply V+ GND 12V DC output 2 Uout_2 output 1 Uout_1 RS485 Uout_1 Uout_2 RS485 A B 24V DC Snow Page 4 of 19

Manual R²S 3 Outputs Uout_1 and Uout_2 The digital outputs Uout1 and Uout2 are short-circuit protected High Side switches with integrated pull down resitors. UB (~ V+) Controller Uout_1/2 10k Fig.: Output Uout_1/2 The functions of the outputs are configured through software. Possible configurations for Uout1 are: • Output compatible to IRSS88 (POUT) • Tipping bucket simulation with a resolution of 1mm • Tipping bucket simulation with a resolution of 0,1mm (default setting) • Tipping bucket simulation with a resolution of 0,01mm The output impuls of the tipping bucket simulation has a length of typically 50ms 50ms t Uout_1 Page 5 of 19

Manual R²S Possible configurations for Uout2 are: • Output compatible to IRSS88 (SACT) • State 1: rain, snowfall = HIGH no precipitation = LOW. Every time the accumulated precipitation quantity amounts to 0,01mm, the output is set to HIGH for 2 minutes. If no precipitation has been detected for more than two minutes, the output is set to LOW. • State 2: In this configuration, output 2 provides a frequency signal so that a distinction between between rain and snow can be made in an evaluating unit (e.g. data loggers). No precipitation = Low Rain: aprox. 10 Hz Snow: aprox. 20Hz (default settings). Important: Changing the configuration can only be done with the corresponding hard and software (obtainable from Lufft)! Page 6 of 19

Manual R²S 4 Commissioning the R²S In the standard version, the R²S is delivered with 10m of lead cable (8 wires) The following table shows the wire colours, the identification and their meaning: Identification Colour Meaning A_Heiz Orange heating, positive, +24V DC/30VA B_Heiz Brown heating, negative, ground V+ Red power supply, positive, +12V DC GND Black power supply, negative, ground A Yellow RS485, A B Green RS485, B Uout_1 Blue output 1, reference potential is GND Uout_2 Purple output 2, reference potential is GND Table: R²S cable connection configuration Connecting the heating element is optional, however necessary if precipitation has to be measured at temperatures below 5ºC (41ºF). The heating element and power supply are electrically isolated. All supply lines are protected in case of reversed polarity. All outpouts are short-circuit protected against the supply voltage. Page 7 of 19

Manual R²S Included with the R²S is an angle bracket for a mast/pole mounting. The angle bracket can be used on masts with diameters from 40mm to 80mm. In order to have the R²S function properly, the following mounting conditions must be fulfilled: • The R²S should always be mounted on top of the mast in order to avoid wrong results through shadowing effects. • No moving objects (trees, bushes, cars etc.) at a distance of 10m around the sensor. • Height of the sensor installation >5m. • Distance to light sources (neon lights, gas discharge lamps, etc.) > 10m. > 10 m> 5 m> 10 m Page 8 of 19

Manual R²S 5 Changing the configuration The configuration can be changed through the RS485 interface of the R²S by using a special software together with a RS232<->RS485 converter. First connect the R²S to the converter (see illustration). Then link the PC to the converter with the included RS232 cable. The 12V power supply for the R²S must be connected to the green plug "POWER". Special must be taken while connecting the wires (polarity)! LED B, green GND, black A, yellow V+, red RS232 to PC 12V DC Power -+ Illlustration: Connecting the RS232<->RS485 converter Page 9 of 19

Manual R²S In case of problems, please check the following points: • Check the supply voltage on the POWER plug of the converter • Is the RS232 interface set correctly? (try as well on a different PC, if available) • Check wire connection of the R²S Page 11 of 19

Manual R²S Operation mode: Apart from the operation mode ON (always on) the R²S supports two further operation modes which make sense mainly for systems which require low power consumption (solar systems). Page 12 of 19

Manual R²S The operation mode „When raining on“ switches the radar sensor on and off for the duration of the selected intervals in ON and OFF. If there is any precipitation detected during the regular ON period, the sensor will remain switched on continuously. When the precipitation ends, the sensor will automatically return to clock based service. The precipitation quantity which appears on the output covers the complete ON period. Precipitation ON/OFF-R²S t t Illustration: Timing Diagram in the “When raining on” mode Page 13 of 19

Manual R²S The operation mode „Pulsed“ switches the radar sensor on and off for the duration of the selected intervals in ON and OFF. This clock based operation mode works independently from any precipitation occurring or not. The quantity of precipitation which appears on the output is the quantity which has been measured during the ON period multiplied with the factor (1+ OFF period / ON period) Example: 0,2mm are measured during the ON period. The On period lasts 15 seconds, the OFF period amounts to 45 seconds. The value on the output is therefore: 0,2mm x (1 + 45s/15s) = 0,8mm Precipitation ON/OFF-R²S t t Fig.: Timing Diagram in mode “Pulsed” Page 14 of 19

Manual R²S The function of the outputs Uout_1 and Uout_2 is set in the menu „OUTPUT config“. For the resolution of the precipitation quantity there are 3 different options availabe (1.0mm, 0.1mm, and 0,01mm). The quantity will always be output on Uout_1. The pulse length is aprox. 10ms. If one of the three possible resolutions is selected, output Uout_2 can assume one of the following functions: 1. Uout_2 = LOW corresponds to no precipitation Uout_2 = HIGH corresponds to rain or snowfall Every time, the quantity of precipitation reaches 0,01 mm the output is set to HIGH for 2 minutes. If no precipitation has been detected for more than 2 minutes, the output is set to LOW. 2. Uout_2 = LOW corresponds to no precipitation. Uout_2 = Frequency of 10 Hz corresponds to rain Uout_2 = Frequency of 20 Hz corresponds to snowfall The frequency signal on the output allows to distinguish between rain and snow with a corresponding evaluation unit. When the R²S is used in the IRSS88 mode the function POUT of the IRSS88 is emulated on the output Uout_1 and the function SACT on the output Uout_2. Page 15 of 19

Manual R²S In the operation mode „RS485 only“ both outputs Uout_1 and Uout_2 are set to LOW. The data can only be read out over the RS485 interface. Important: The output configuration "RS485 only" will only work in combination with the operation mode "ON" but does not support the power saving conditions „When raining on“ or „Pulsed“! Page 16 of 19

Manual R²S 6 RS485 Protocol 6.1 Telegram setup descending byte series: Byte number Meaning Abbr. range 1 Telegram start STX 0x02 2 Identification ID 0 ... 250 3 Length CNT 1 ... 255 4 Command CMD 0 ... 255 5 ... n additional data D0 ... Dn 0 ... 254 Bytes n + 1 n + 2 Block check CRC_L CRC_H 16 Bit CRC check sum from ID until the last Data byte n + 3 End of telegram ETX 0x03 6.2 Physical conditions RS485 – 2 wire (half duplex) Data bits: 8 Stop bits: 1 Parity: none Baudrate : 19200 Baud (Default setting) Check sum: 16 Bit CRC from Ident. byte (ID) until the last data byte CRC-Polynomial: x16 + x12 + x5 + 1 (LSB first) mode Timeout: Answer from the slave must be available max. 0.5 Sec. after request from the master In case of timeout or erroneous answer from the RRS the request from the supplied PC program is repeated twice max. Page 17 of 19

Manual R²S 6.3 Query of sensor data as a block (CMD = 0x03) Master: STX, ID, CNT = 1, CMD = 0x03, CRC_L, CRC_H, ETX Slave: STX, ID, CNT = x, CMD = 0x03, D0 ... Dn (see table below), CRC_L, CRC_H, ETX Slave D0 ... Dn Meaning D0, D1 Precipitation quantity 0..655,35 mm -> 0..65535 D2 Type of precipitation 0/1/2 D3 Internal use only 0..255 Type of precipitation: Precipitation quantity = 0mm and D2=0 => no precipitation Precipitation quantity > 0mm and D2=1 => Rain Precipitation quantity > 0mm und D2=2 => Snow Important: On request CMD = 0x03, the sensor provides the accumulated precipitation quantity, evaluated between the actual and previous request. Page 18 of 19

Manual R²S 7 Declaration of Conformity Declaration of EEC Conformity For the following product R²S, Order Reference 8367.xx it is hereby confirmed that they comply with the principal safety requirement which are set out in the guidelines of the council for the unification of legal regulations of the member states concerning electromagnetic compatibility (89/336/EEC) and 1999/5/EG. This declaration is valid for all specimens which are manufactured according to the current production drawings – which are the component of this declaration. The manufacturer is responsible for this declaration Issued by G.LUFFT Mess- u. Regeltechnik GmbH Gutenbergstraße 20 D-70736 Fellbach Postfach 4252 D-70719 Fellbach Fellbach-Schmiden, 14.6.2002 Klaus Hirzel Page 19 of 19

Manual R²S Declaration of Conformity for USA 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 operation. Usually this is followed by the following FCC caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. Declaration of Conformity for CANADA 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. Usually this is followed by the following RSS caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment Page 20 of 19

Version 6.0 IPM-137 page 1 of 3 2007-05-07 DATA SHEET Product Family: K-Band Transceivers K-Band Transceiver with two integrated patch antennas, RF- and IF-pre-amplifier IPM-137 (and variant IPM-137_US) Description: - radar-based motion detector - available in different frequency ranges: IPM-137; ETSI-compliant frequency IPM-137_US; FCC-compliant frequency - advanced PHEMT-oscillator with low current consumption - RF-pre-amplifier for lowest noise operation - split transmit and receive path for maximum gain - mono (single channel) operation - IF-pre-amplifier, bandwidth limited for lowest noise performance - compact outline dimensions Absolute Maximum Ratings: Parameter Symbol Rating Units supply voltage VCC 5.5 V operating temperature (out of spec) TOP - 40 / + 85 °C storage temperature TSTG + 90 °C Electrical Characteristics: Parameter Symbol min. typ. max. units comment transmit frequency fIPM-137 24.000 24.125 24.250 GHz fIPM-137_US 24.075 24.125 24.175 GHz output power (EIRP) Pout 18 dBm temperature drift ∆f - 500 kHz/°C antenna pattern horizontal 65 ° azimuth vertical 40 ° elevation side lobe suppression horizontal 15 dB azimuth vertical 15 dB elevation IF output voltage offset VCC/2 V IF-amplifier gain 46 dB bandwidth 50 – 1.5k Hz supply voltage VCC 4.75 5.0 5.25 V supply current ICC 60 mA IF-amp included operating temperature TOP - 20 + 60 °C outline dimensions ~ 42 x 50 x 11 compare drawing

Version 6.0 IPM-137 page 2 of 3 2007-05-07 Interface: The sensor provides a 2 mm pitch 6 pin connector Molex P/N 51004-0600. Pin # Description In/Out Comment 1 not connected 2 VCC input supply voltage (+5 V) 3 GND input analog ground 4 IF1 output signal output 5 not connected 6 not connected mates with: Molex P/N 53014, 53015 and 53025 Mechanical Outlines: (dimensions in mm) azimuth elevation

Version 6.0 IPM-137 page 3 of 3 2007-05-07 Certification and environment protection: InnoSenT GmbH has established and applies a quality system for: Development, production and sales of radar sensors for commercial and industrial sensors An audit was performed, Report No. 010350 Proof has been furnished that the requirements according to DIN EN ISO 9001:2000 are fulfilled. This InnoSenT product is compliant to the restriction of hazardous substances (RoHs – European Union directive 2002/95/EG). InnoSenT Approval This data sheet contains the technical specifications of the described product. The technical specifications of this data sheet are approved: InnoSenT GmbH Am Roedertor 30 97497 Donnersdorf GERMANY Customer Approval This data sheet contains the technical specifications of the described product. Changes of the specifications must be in written form. All previous versions of this data sheets are no longer valid. The technical specifications of this data sheet are approved: G. Lufft Mess- und Regeltechnik GmbH Gutenbergstr. 20 70736 Fellbach ____________________________________________ Signature(s) ____________________________________________ company stamp Name(s) Contact Information: InnoSenT GmbH Am Roedertor 30 97499 Donnersdorf Germany Phone: +49 (0) 9528-9518-0 Fax: +49 (0) 9528-9518-99 E-Mail: info@InnoSenT.de Web: www.InnoSenT.de

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