16. Annex 3: Modbus
16.1 Hardware Requirements
16.1.1 Cabling:
ModBus RTU is available on the on RJ45 connector located on the back plane of the rack containing the T2S ETH
controller. The pin out of this connector is the following:
Pin Number Name Description
1 CANH CANH pin for Candis
2 CANL CANL pin for Candis
3 GND_IAX Digital Communication Ground
4 GND_IAX Digital Communication Ground
5 12V_IAX +12 V unregulated
6 COM_A RS 485 A
7 GND_IAX Digital Communication Ground
8 COM_B RS 485 B
16.1.2 Baud rate, parity and mode
Only RTU mode is supported.
Item Value Default
Slave address From 1 to 247 1
Baud Rate 9600, 19200, 38400 or 115200 19200
Parity Even, odd, none Even
Stop bits One, two One
Mode RTU -
Electrical interface RS485 -
77 – Monitoring T2S - ETH User Manual – v1.4
Annex 3: Modbus
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