Siemens SIRIUS 3RK3 - Control of Safety-Related AS-I Outputs

Example
The MSS 3RK3 Advanced simulates a safety-related AS-i input slave on the AS-i bus. The signals
of terminals of the expansion modules can be entered in the logic of the MSS 3RK3 Advanced as
AS‑i signals on the AS‑i bus. A safety monitor, for example, an AS-i safety monitor, can evaluate
these signals and shut down the motors safely.
3a
3b
1
4
2
6
3
5
4a
[%LW
① CPU/PLC
② AS-i power section
③ As-i safety monitor with connected motors on Q1/Q2
④ MSS 3RK3 Advanced (AS-i address #01) with emergency stop on IN1/IN2
⑤ Data exchange between MSS 3RK3 Advanced and the AS-i safety monitor
⑥ AS‑i master
Figure 6-25 Simulation of safety-related AS‑i input slaves
In this case, the input and output terminals of the logic diagram in Safety ES have the following
designations:
6ORWB,1
6ORWB,1
,1
,1
6ORWB$6,B)6
4a 4
4 3
Figure 6-26 Simulation of safety-related AS‑i input slaves in the logic diagram
6.5.7.6 Control of safety-related AS-i outputs
The MSS 3RK3 with AS-i interface can control safety-related AS-i outputs. Safety-related AS‑i
output slaves are simulated on the AS‑i bus for this purpose.
• The MSS 3RK3 ASIsafe basic can simulate up to 8 safety-related AS‑i output slaves.
• The MSS 3RK3 ASIsafe extended can simulate up to 10 safety-related AS‑i output slaves.
• The MSS 3RK3 Advanced can simulate up to 12 safety-related AS‑i output slaves.
Operation
6.5 Connecting to the AS-i master via AS-Interface
SIRIUS 3RK3 Modular Safety System
220 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006