Siemens SIRIUS 3RK3 Equipment Manual page 87

• 1 safety-related two-channel semiconductor output
• 2 test outputs for sensor supply and monitoring when used with safety-related sensor inputs
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.
MSS 3RK3 ASIsafe basic on the AS-i bus
The MSS 3RK3 ASIsafe basic can perform various functions on the AS‑i bus:
• Simulation of up to 4 non-safety-related AS-i slaves
• Simulation of up to 8 safety-related AS-i input slaves
• Simulation of up to 8 safety-related AS-i output slaves
• Display of up to 31 safety-related AS-i outputs
• Monitoring of up to 14 non-safety-related AS-i slaves
• Monitoring of up to 31 safety-related AS-i input slaves
You will find further information in Chapter "Connecting to the AS-i master via AS-Interface
(Page 202)."
Structure of the 3RK3 ASIsafe basic central unit
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
Front view
3RK3121-1AC00
24V
DC
Description of the hardware
5.1 Description of the individual modules
No. Meaning
①
Removable terminal block D
②
Removable terminal block C
③
RESET button
④
Removable terminal block A
⑤
External memory module (X3; sealable)
⑥
Label
⑦
Display LEDs
⑧
Connection of PC or programming device,
interface module, diagnostics display (X1)
87