Siemens SIRIUS 3RK3 Equipment Manual page 231

Example 2
The MSS 3RK3 Advanced monitors the safety-related AS‑i input slave to whose inputs an
EMERGENCY STOP is connected. An indicator light is connected to a standard output of the
AS‑i slave, which is switched by the AS‑i master. The MSS 3RK3 Advanced acquires the status of
the indicator light with "monitoring standard slaves" functionality. This status can be fed into the
logic of the MSS 3RK3 Advanced via input cells.
Note
The standard output can only be interconnected in the logic if the "Monitor non safe I/O"
checkbox is selected in the subsystem in the slave properties.
The motor of the system is safely shut down through a safety-related output of an expansion
module and a further indicator light indicates release of the EMERGENCY STOP.
1 2
5
①
CPU/PLC
②
AS-i power section
③
Safety-related AS-i input slave (AS‑i address #02) with standard outputs
An EMERGENCY STOP is connected to the safety-related inputs (IN1/IN2), and an indicator light is connected to the
standard output (OUT1)
④
MSS 3RK3 Advanced with connected indicator light (4a) to Q4 and motor (4b) to Q2
⑤
AS‑i master
Figure 6-36 Evaluation of a safety-related AS‑i input slave
In this case, the input and output terminals of the logic diagram in Safety ES have the following
designations:
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
3
3a
3b
6.5 Connecting to the AS-i master via AS-Interface
4
Operation
4a
4b
231