￭
Single-channel connection of activation switch
Note:
• Both STO inputs (IN1, IN2) must be connected to the activation switch. Otherwise, no SIL/PL classi-
fication 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.
Inverter unit1
Control unit2
Activation switch
Note: A single-channel activation switch can limit the SIL/PL capability of the safety function
to a lower level than the SIL/PL capability of the STO function of the drive.
K
* "OUT1" with frame R5i
196 The Safe torque off function
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