Single-channel connection of activation switch
Inverter unit
Control unit
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.
The Safe torque off function 193
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