Special Connection Instructions; Connection Examples; Hardware Settings; Activating The Terminating Resistor - Endress+Hauser Proline Prosonic Flow I 400 Operating Instructions Manual

Electrical connection
40
7.4

Special connection instructions

7.4.1

Connection examples

Modbus RS485
1 2
A
B
 13 Connection example for Modbus RS485, non-hazardous area and Zone 2/Div. 2
1 Control system (e.g. PLC)
2 Ground cable shield 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
7.5

Hardware settings

7.5.1

Activating the terminating resistor

Modbus RS485
To avoid incorrect communication transmission caused by impedance mismatch, terminate
the Modbus RS485 cable correctly at the start and end of the bus segment.
5V
DIP 1 DIP 3
390 Ω 220 Ω
DIP 2
26 27
 14 Terminating resistor can be enabled via DIP switch on the electronics module
7.6

Ensuring the degree of protection

7.6.1

Degree of protection IP66/67, Type 4X enclosure

The measuring device fulfills all the requirements for the degree of protection IP66/67,
Type 4X enclosure.
Proline Prosonic Flow I 400 Modbus RS485
0V
1 2 3 4
390 Ω
ON
OFF
3
A
B
A
B
Endress+Hauser
4
4
A0028765
A0023063