Siemens SIRIUS 3RK3 - Connecting Non-Safety-Related Outputs

Connection options for the 2/4F‑DI, 1/2F‑RO, and 4/8F‑RO expansion modules
Single-channel actuator wiring Two-channel actuator wir‐
ing via
1 safety-related output*
)
Two-channel actuator wiring via
2 safety-related outputs
4$
0
4
4
/
4$
0
4$
0
4%
4
4
4
4
/
4$
4%
0
4
4
4%
4$
0
4
4
/
4$
4%
0
QA/QB contactors
Qx.1, Qx.2 safety-related relay outputs
Note
*
)
SIL 2/3 per EN 61508 or PL d/e per EN ISO 13849-1
To achieve SIL 2/3 per IEC 61508 or PL d/e per EN ISO 13849-1, a fault exclusion such as a short-
circuit to a power cable or ground is required. This can be implemented, for example, within a
cabinet and by installing the connection cables in such a way that they are protected.
If this is not possible, the actuators must be wired via two safety-related outputs; see the right-
hand image. For this purpose, separate cables must be laid to actuators/contactors. In the
associated function element "F output," the output type "F output redundant" must be chosen.
5.3.2.7 Connecting non-safety-related outputs
Signaling outputs
The 8DO expansion module has 8 non-safety-related semiconductor outputs. These can be used
for signaling purposes, to signal system states, for example. The safety-related outputs can also
be used for signaling purposes.
Description of the hardware
5.3 Connecting / wiring
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 143