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Single-channel connection of activation switch
￭
1
2
Note:
•Both STO inputs (IN1, IN2) must be connected to the activation switch. Otherwise, no SIL/PL classification
is given.
•Pay special attention to avoiding any potential failure modes for the wiring. For example, use shielded cable.
For measures for fault exclusion of wiring, see eg. EN ISO 13849-2:2012, table D.4.
1
Drive
2
Control unit
K
Activation switch
OUT
+24 V
SGND
IN1
IN2
The Safe torque off function 87
K
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