9
2113689-04-07/19 (Translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CET.-AS-…
EN
6.1. Guard locking on version CET3-AS
(Guard locking actuated by spring force and released by power-ON)
Activating guard locking: Close guard; no auxiliary power at the solenoid and/or clear AS-Interface output bit D0.
Releasing guard locking: Apply auxiliary power to the solenoid and set AS-Interface output bit D0.
The spring-operated guard locking functions in accordance with the closed-circuit current principle. If auxiliary power is
interrupted, guard locking remains active and the guard cannot be opened directly.
Important!
If the guard is open when the auxiliary power is interrupted and the guard is then closed, guard locking
is activated. This can lead to persons being locked in unintentionally.
The actuator’s guard locking pin cannot be moved out of the recess and the guard is locked as long as the plunger is
pressed down by the actuator.
If the solenoid is controlled via the ASi bus and auxiliary power is applied to the solenoid, the guard locking pin is retracted
and the actuator is released. The guard can be opened.
6.2. Guard locking on version CET4-AS
(Guard locking actuated by power-ON and released by spring force)
Important!
Use as guard locking for personnel protection is possible only in special cases, after strict assessment
of the accident risk (see ENISO14119:2013, section 5.7.1)!
Activating guard locking: Apply auxiliary power to the solenoid and set AS-Interface output bit D0.
Releasing guard locking: No auxiliary power at the solenoid and/or clear AS-Interface output bit D0.
The magnetically actuated guard locking operates in accordance with the open-circuit current principle. If the solenoid is
not controlled (D0=0) or if auxiliary power is switched off, guard locking is released and the guard can be opened directly!
If the solenoid is controlled via the ASi bus (D0=1) and auxiliary power is applied to the solenoid, the plunger is released.
The actuator’s guard locking pin can now press the plunger down. The guard is locked as soon as the guard locking pin is
fully inserted into the recess.
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