Siemens SIRIUS 3RK3 - Page 80

Description of the hardware
5.3 Connecting/wiring
Modular Safety System 3RK3
78 System Manual, 10/2008, 926 2530-02 DS 02
Every diagnostics module has three connections:
● Connections on the rear:


The rear is normally not accessible if the diagnostics module is installed.The connection
cable from the central unit / interface module is always connected to the system interface
S2 ② there. The diagnostics module also has to be grounded at the functional ground ①.
For more information:
Grounding (Page 85)
Note
Only the central unit or the interface module may be connected to the system interface
S2 ② on the rear of the diagnostics module.
● Connections on the front.
SIRIUS 3RK3
DEVICE
BF
SF

The front is normally accessible if the diagnostics module is installed. Components are
only directly inserted in the system interface S1 ③ as required and removed after use.
These can be:
– PC cable for connecting a PC/PG
– Cover (when the system interface is not used)
Note
Only one PC / PG may be connected to the system interface on the front of the
diagnostics module.