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D01-915en201911 Manual eCHEM Chlorine Dioxide
Chlorine Dioxide
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Annex
Modbus functions
Code
Function
0x03
Read Holding Registers [16bit]
0x04
Read Input Registers [16bit]
0x06
Write Single Registers
0x10
Write Multiple Registers
Device data
Address
Access
Data type
Parameters
Example
0x03
R / O
char [16]
Sensor type
CLO
2
_122
0x04
R / O
Int
Hardware
1120 (1.120)
0x06
R / O
Int
Firmware
1202 (1.202)
Modbus sensor short data
Electrochemical sensor with digital signal processing and Modbus RTU interface.
Power supply
•
9...30 VDC, max. 56 mA
Pin assignment
8-pin screw connector, M12, reverse polarity protection
•
1 RS485 A
•
2 RS485 B
•
5 reserved
•
7 GND
•
8 +9...+30 V
There are no terminating resistors in the sensor!
Galvanic isolation
MODBUS parameters
RTU mode
•
MODBUS ID: 70
•
9600 baud
•
No Parity
•
1 Stop-bit
Modbus RTU
