Electrical connection
Proline Promass E 300 Modbus RS485
38
Hauser
7.4
Special connection instructions
7.4.1
Connection examples
Modbus RS485
2
1
A
B
3
4
4
A
B
A
B
A0028765
10
Connection example for Modbus RS485, non-hazardous area and Zone 2; Class I, Division 2
1
Control system (e.g. PLC)
2
Cable shield provided at one end. The cable shield must be grounded at both ends to comply with EMC
requirements; observe cable specifications
3
Distribution box
4
Transmitter
Current output 4-20 mA
4...20 mA
2
1
3
A0028758
11
Connection example for 4-20 mA current output (active)
1
Automation system with current input (e.g. PLC)
2
Analog display unit: observe maximum load
3
Transmitter
2
4...20 mA
3
1
4
A0028759
12
Connection example for 4-20 mA current output (passive)
1
Automation system with current input (e.g. PLC)
2
Active barrier for power supply (e.g. RN221N)
3
Analog display unit: observe maximum load
4
Transmitter
