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E2608-VOC 

Rev 05.03.2021 

Modbus RTU Communication 

RS485 communication interface 

 
Communication parameters 

Modbus holding registers 

Register addresses are shown 0-based, Address in hexadecimal, Reg in decimal format. 
Modbus holding register numbers MHR are shown in the decimal 1-based format and may

 

 

 

 

 

 

   

 

 

 

 

 

 

be addressed either from 00001 or 40001 base. 

 

20 

Databits: 8   
Parity: none / odd / even   
Stop bits: 1 or 2   
Protocol: Modbus RTU 

Supported Modbus functions: 
03 – Read multiple registers  
06 – Write a single register 

Parameter 

Permitted values 

Default 

Supported baud rates  1200, 2400, 4800, 9600, 19200, 38400, 57600 

9600 

Data bits 

Parity 

none / odd / even 

none 

Stop bits 

1, 2 

Protocol 

Modbus RTU 

 

Modbus functions 

03 - Read multiple registers 
06 - Write a single register 

Error codes 

01 – Illegal function 
02 – Illegal data address 
03 – Illegal data value 
04 – Slave device failure  
         (details of last error 04 can be read from register 0x0008) 

Address  Reg / MHR  RW  Description 

Supported values (dec) 

Default 

0x0001 

1 / 40002  R  Hardware version 

 

0x0002 

2 / 40003  R  Software version 

 

0x0003 

3 / 40004  R  Product serial number 

1...65535 

0x0004 

4 / 40005  RW  Slave ID (net address) * 

1...247 ** 

Summary of Contents for PluraSens E2608-VOC

Page 1: ...PluraSens Solvent Vapor Detector Transmitter E2608 VOC User Manual ...

Page 2: ...ditions 12 Installation guidelines 13 Wall mount version 13 Duct mount version 13 Mounting dimensions 14 Sensor probe handling 15 Electrical connections 16 Operation 17 Maintenance 17 Calibration 17 Delivery set 18 Order code for E2608 VOC options 18 Configuring 19 Return to default settings 19 Modbus RTU Communication 20 RS485 communication interface 20 Communication parameters 20 2 ...

Page 3: ...E2608 VOC Rev 05 03 2021 Modbus holding registers 20 Warranty 25 Manufacturer contacts 25 3 ...

Page 4: ...as density to air 2 0 Conversion 1 ppm 2 38 mg m 3 Boiling point 56 11 C Low explosive limit LEL vol in air 2 5 Upper explosive limit UEL vol in air 12 8 Odor Characteristic pungent smell Hazards Highly flammable Slightly toxic in normal use Irritant causing mild skin irritation and moderate to severe eye irritation At high vapor concentrations it may depress the CNS Exposure limits 8 hours 2000 3...

Page 5: ... 2 69 Conversion 1 ppm 3 19 mg m 3 Boiling point 80 C Low explosive limit LEL vol in air 1 2 Upper explosive limit UEL vol in air 7 8 Odor Hyacinth like odor Hazards Highly flammable Irritant Carcinogen May cause dizziness headache nausea staggering gait anorexia lassitude Target organs eyes skin respiratory system blood central nervous system bone marrow Exposure limits NIOSH REL Ca TWA 0 319 mg ...

Page 6: ...7 C Low explosive limit LEL vol in air 3 3 3 Upper explosive limit UEL vol in air 19 Odor The characteristic smell of alcohol Hazards Highly flammable Gas air mixtures are explosive Inhalation of vapors leads to cough headache fatigue and drowsiness High concentrations may damage the fetus Repeated high exposure may affect the liver and the nervous system Exposure limits according to Commission Di...

Page 7: ...88 Conversion 1 ppm 3 60 mg m 3 Boiling point 77 1 C Low explosive limit LEL vol in air 2 Upper explosive limit UEL vol in air 11 5 Odor Sweet pear smell Hazards Flammable Short term exposure to high levels of ethyl acetate results first in irritation of the eyes nose and throat followed by headache nausea vomiting sleepiness and unconsciousness Exposure limits NIOSH TWA 8 hours 1400 mg m 3 400 pp...

Page 8: ... 1 27 Upper explosive limit UEL vol in air 6 75 7 1 Odor Characteristic chemical smell Hazards Highly flammable Gas air mixtures are explosive Inhalation possible effects irritation eyes nose lassitude weakness exhaustion confusion euphoria dizziness headache dilated pupils lacrimation discharge of tears anxiety muscle fatigue insomnia paraesthesia dermatitis liver kidney damage Exposure limits ac...

Page 9: ...ated for 25 C and 1 atm 9 Chemical formula C 6 H 4 CH 3 2 Isomers ortho xylene meta xylene para xylene Molar weight 106 Conversion 1 ppm 4 34 mg m 3 Boiling point 144 4 C 139 C 138 35 C Low explosive limit LEL vol in air 0 9 1 1 Upper explosive limit UEL vol in air 6 0 7 0 Odor Characteristic chemical smell Hazards Flammable Inhaling can cause dizziness headache drowsiness and nausea Exposure limi...

Page 10: ... 30 VDC default 24 VAC or 90 265 VAC as options Power consumption 2 VA Load resistance R L Us 2 V 22 mA for 4 20 mA R L 250 kOhm for 0 10 V mode Digital interface RS485 Modbus RTU protocol No galvanic isolation Analog outputs 2 4 20 mA 0 10 V user settable Outputs assignment OUT1 Gas OUT2 Gas Output scale width 10 resolution Recommended 20 100 of the detection range Relay outputs 2 SPST max 5 A 30...

Page 11: ... 70 C 95 RH non condensing 0 9 1 1 atm Explosion safe indoor areas Normal ambient oxygen level Avoid strong mechanical shock vibrations or EMI Avoid exposure to corrosive gases or silicone containing products Other options Remote probe Protection IP65 default cable length 3 0 m max height 80 mm max diameter 65 mm ...

Page 12: ...o the safety provisions applicable in the country of use Do not perform any maintenance operation with the power on Do not let water or foreign objects inside the device Removal of the PCB from the enclosure voids the warranty Do not touch the electronic components directly as they are sensitive to static electricity Connection diagrams can be found in the electrical connections section The device...

Page 13: ...o 5 meters radius For early leakage detection install the sensor as close as possible to the potential leakage sources flanges valves pressure reducers pumps etc taking into consideration other points listed above For general area monitoring without definite leakage sources the detector transmitters should be distributed evenly in the room For personal safety control the detector transmitters are ...

Page 14: ...E2608 VOC Rev 05 03 2021 Mounting dimensions Wall mount version with mounting lugs Duct mount version 14 ...

Page 15: ...ect the sensor from dust dirt and water drops The filter should be replaced if it gets strongly contaminated To replace the PTFE filter unscrew the sensor head cap and remove the old filter Place a new filter into the cap and tighten it again NOTE Never stab or press the filter near its center where the sensor is located since this may damage the sensor Do not remove the filter as it may cause the...

Page 16: ...er Use a twisted pair cable e g LiYY TP 2 2 0 5 mm 2 or CAT 5 to connect the device to the RS485 network A and B on the device represent DATA and DATA respectively polarity must be respected when connecting to an external RS485 network Both analog outputs can be independently changed between 4 20 mA and 0 10 V type using jumpers J1 OUT1 and J2 OUT2 By closing pins on a specific jumper the related ...

Page 17: ...aintenance Do not perform any maintenance operation with the power on Clean the device with a soft damp cloth Do not use any abrasive cleaning agents Do not immerse the device in water or any cleaning media Calibration E2608 VOC detector transmitters have been calibrated by the Manufacturer with standard gas mixtures before delivery Provided that the sensor is used under moderate conditions field ...

Page 18: ... rubber flange for Remote probe option Fixing clamp for Remote probe option Order code for E2608 VOC options 18 E2608 options Order code Remote probe 3 m cable E2608 VOC RP33 3 Remote probe 10 m cable E2608 VOC RP33 10 Duct mount option stem Ø35 L230 mm E2608 VOC DM Integrated 90 265 V mains power supply module E2608 VOC 230 Integrated 24 VAC power supply module E2608 VOC 24VAC Remote LCD single v...

Page 19: ...parameter Flexible setting of analog output scales for each output Output zero and slope adjustment for calibration Free assignment of each of two relays to the chosen parameter Several relay control logic modes Switch delays and minimum on off state durations for each relay The output scales can be changed by Modbus commands by using the configuration software and the standard configuration kit s...

Page 20: ...isters 06 Write a single register Parameter Permitted values Default Supported baud rates 1200 2400 4800 9600 19200 38400 57600 9600 Data bits 8 8 Parity none odd even none Stop bits 1 2 1 Protocol Modbus RTU Modbus functions 03 Read multiple registers 06 Write a single register Error codes 01 Illegal function 02 Illegal data address 03 Illegal data value 04 Slave device failure details of last er...

Page 21: ...RW Description Supported values dec Default 0x00A5 165 40166 RW Zero adjustment for gas data ADC 32000 32000 ADC units 0 0x00A6 166 40167 RW Slope adjustment for gas data 1 65535 512 0x00A7 167 40168 RW Change rate limit for gas data units s 1 32000 0 no limit 0 0x00A8 168 40169 RW Integrating filter time constant s 1 32000 seconds 0 no filter 0 0x00C9 201 40202 RW Parameter tied to analog output ...

Page 22: ...lay RE1 0 1000 s 0 0x00D8 216 40217 RW Switching delay for relay RE2 0 1000 s 0 0x00D9 217 40218 RW Minimal on off time for relay RE1 0 1000 s 0 0x00DA 218 40219 RW Minimal on off time for relay RE2 0 1000 s 0 Address Reg MHR RW Description Supported values dec Default 0x00DB 219 40220 RW Control logic for relay RE1 0 none 1 relay on at high values 2 relay on at low values 3 relay on at values wit...

Page 23: ...ignaling off on analog output1 bit 3 0 1 in case the sensor is absent turn on signaling with low current high current on analog output1 if bit 2 0 this bit will be ignored bit 4 0 1 in case of sensor absent turn signaling off on analog output2 bit 5 0 1 in case of sensor absent turn on signaling with low current high current on analog output2 if bit 4 0 this bit will be ignored bit 6 0 1 current v...

Page 24: ...s value is dynamic and not kept in EEPROM after a restart 24 0x0101 257 40258 R Raw gas sensor data 0 4095 ADC units 0x0103 259 40260 R Gas concentration gas units 0 65535 gas units 0x0105 261 40262 RW 0 value for analog output 1 32000 32000 gas units User defined 0x0106 262 40263 RW 100 value for analog output 1 32000 32000 gas units User defined 0x0107 263 40264 RW 0 value for analog output 2 32...

Page 25: ...Manufacturer will at its option either repair or replace a product that proves to be defective This warranty is void if the product has been operated in conditions outside ranges specified by the Manufacturer or damaged by customer error or negligence or if there has been an unauthorized modification Manufacturer contacts Evikon MCI OÜ Teaduspargi 7 9 Tartu 50411 Estonia info evikon eu www evikon ...

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