Siemens SIWAREX WP231 - Connection of RS485 Serial Interface

Connection
6.8 Connection of RS485 serial interface
SIWAREX WP231
38 Manual, 07/2014, A5E31238908A-02
6.8
Connection of RS485 serial interface
The following devices can be connected to the serial interface:
● Siebert display type S102 (connections: see chapter Connection of Siebert display via
RS485 (Page 39))
● Operator Panels or other HMI devices with RS485 and Modbus protocol RTU
● Communication partner with Modbus protocol RTU
Table 6- 6 Connection of RS485 serial interface
Labeling
Function
EIA-485 T+ RS485 termination +
EIA-485 T- RS485 termination -
EIA-485 D+‘ RS485 data line +‘ for looping through of bus signal
EIA-485 D-‘ RS485 data line -‘ for looping through of bus signal
EIA-485 D+ RS485 data line + for feeding in of bus signal
EIA-485 D- RS485 data line - for feeding in of bus signal
If a SIWAREX WP231 module forms the termination of an RS485 network, insert wire
jumpers between the D+‘ and T+ terminals and between the D-‘ and T- terminals for
termination of the bus network.