Siemens SIRIUS 3RK3 Equipment Manual page 137

Monitoring functions with cross-circuit detection
The following table provides an overview of cross-circuit detection for the monitoring functions
in Safety ES:
Monitoring function
Universal monitoring
EMERGENCY STOP
ESPE (electro-sensitive protec‐
tive equipment)
Safety shutdown mat (NC
principle)
Safety shutdown mat (cross-
circuit principle)
Protective door
Protective door with lock
Acknowledgment button
Two-hand operator controls
Mode selector switch
AS-i 2F-DI
Outputs
1. If outputs are used as two-channel outputs, the two outputs do not have to be on the same
device.
2. Safety-related semiconductor outputs can be used for safety-related shutdown to SIL 3 per
EN 61508 and PL e / Cat. 4 per EN ISO 13849-1 if the cables are installed in a protected
manner or routed inside the cabinet.
Wiring actuators
Chapters "Connecting safety-related semiconductor outputs (Page 140)," "Connecting safety-
related relay outputs (Page 141)," and "Connecting non-safety-related outputs (Page 143)"
describe how to connect the actuators to the safety relay.
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
Cross-circuit detection
can be set to on/off
can be set to on/off
can be set to on/off
can be set to on/off
ON
can be set to on/off
can be set to on/off
ON
can be set to on/off
OFF
OFF
Note
‑
‑
• If the ESPE has solid-state outputs, cross-circuit detection
must be deactivated.
• If the ESPE has floating contacts, only the sensor line be‐
tween the safety relay and the ESPE is tested when cross-
circuit detection is activated. The light barrier is not tested.
‑
With this monitoring function, a cross-circuit is not a fault, but
complies with the safety requirement. A cross-circuit is not
therefore evaluated as a fault and does not need to be ac‐
knowledged.
To be able to ensure absence of interaction of the safety shut‐
down mat with the cross-circuit detection of other sensors,
only the safety shutdown mat is connected to the test outputs
T1 and T2.
‑
‑
Cross-circuit monitoring is always implemented in the case of
a single-channel acknowledgment button. This is why a single-
channel acknowledgment button must also be connected via
a test output. Non-floating wiring is not possible.
A two-hand control type III C (Cat. 4) can only be implemented
if cross-circuit detection is activated.
‑
‑
Description of the hardware
5.3 Connecting / wiring
137