USER HANDBOOK 1.2 | B-PRIMIS DC/ET PRIME 2110W X C, 2115WUX C
Berghof Automation GmbH | Harretstraße 1 | 72800 Eningen | www.berghof-automation.com
270011X00_B-PRIMIS_ET-DC-PRIME 2110W-2115W_EN.docx
47
5.2.10. Serial interfaces (DC2115WUX CM / DC2110W X CM)
The module has two serial communications interfaces (1x RS-232 and 1x RS-485), which are connect-
ed via the common RJ45 plug X6.
Maximum baud rate for both interfaces: 115 kBd
Fig. 29: RS-232 / RS-485 interface X9
Pin assignment for RS-232 / RS-485 interface connector X9
Pin Assignment / software inter-
face
Pin Assignment / software inter-
face
1
RS-232 RX / COM 1
5
RS-485 Tx/Rx
– / COM 2
2
RS-232 TX / COM 1
6
NC
3
NC
7
(reserved)
4
RS-485 Tx/Rx+ / COM 2
8
ISO GND
The RS-485 interface is “soft” terminated in the dialogue controller with 560 Ω.
If the interface is located at the start or end of the bus topology:
Set switch S3 to ON in order to switch on the 120 Ω terminating resistor.
Fig. 30: RS-485 switchable terminating resistor