Siemens SIRIUS 3RK3 Equipment Manual page 77

Note
Safety-related outputs
If you use the safety-related outputs with a two-channel shutdown, a fault exclusion, such as a
short-circuit to P or M, is required. This condition is met within a control cabinet and when the
connection cables are installed in such a way that they are protected.
Structure of the 3RK3 Basic central unit
Internal circuit diagram
Figure 5-3
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
Front view
3RK3111-1AA10
24V
DC
MSS 3RK3 Basic internal circuit diagram
Description of the hardware
5.1 Description of the individual modules
No. Meaning
①
Removable terminal block D
②
Removable terminal block C
③
Connection for expansion module (X2)
④
RESET button
⑤
Removable terminal block A
⑥
Connection of a memory module (X3,
sealable)
⑦
Label
⑧
Display LEDs
⑨
Connection of PC or programming device,
interface module, diagnostics display (X1)
77