13 Sensor - Actuator bus (MODBUS RTU)
The S200 measurement and monitoring device is equipped with a sensor - actuator bus. The
Modbus RTU protocol is used.
This piece of equipment has an RS 485 interface.
Shielding = Terminal 94
A = + Terminal 93
B = - Terminal 92
+12V = terminal 91
0V = terminal 90
A max. load of 200mA is allowed for a 12V power supply.
13.1 Shielding
The use of shielded cables provides high protection against electromagnetic interference,
especially high frequencies. However, the effectiveness of the shield depends on the careful
installation of the cable.
The shielding is located near the main ModBus.
13.2 Communication parameters
Transmission speed: 9,600 bps
Data bits: 8
Start-up bits: 1
Shutdown bits: 1
Parity: none
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