Operating Instructions
Transponder-Coded Safety Switch CET.-AR-…
10
(Translation of the original operating instructions) 2110788-13-03/20
6.3. Door monitoring output (OUT D)
Versions CET3 and CET4 feature a door monitoring output (OUT D). The door monitoring output is switched on as soon as
the actuator is above the extended plunger (state: guard closed and not locked). The door monitoring output also remains
switched on when guard locking is active.
6.4. Diagnostic output (DIA)
Some versions have a diagnostic output. The diagnostic output is switched on in the event of a fault (switch-on condition as
for DIA LED, see chapter
12. System status table on page 41
6.5. Guard locking for versions CET1 and CET3
(guard locking actuated by spring force and released by power-ON)
Activating guard locking:
close guard; no voltage at the solenoid.
Releasing guard locking:
apply voltage to the solenoid.
The spring-operated guard locking functions in accordance with the closed-circuit current principle. If the voltage is interrupted
at the solenoid, the guard locking remains active and the guard cannot be opened directly.
Important!
If the guard is open when the power supply is interrupted and 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.
When voltage is present at the guard locking solenoid, the plunger is extended and lifts the actuator’s guard locking pin
above the edge of the recess. The guard can be opened.
6.6. Guard locking for versions CET2 and CET4
(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 EN ISO 14119:2013, section 5.7.1)!
Activating guard locking:
apply voltage to the solenoid.
Releasing guard locking:
disconnect voltage from the solenoid.
The magnetically actuated guard locking operates in accordance with the open-circuit current principle. If the voltage is
interrupted at the solenoid, the guard locking is released and the guard can be opened directly!
The guard can be opened as long as the plunger is held in the extended position.
The plunger is released when voltage is present at the guard locking solenoid. 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.
6.7. Start button and feedback loop (optional)
A start button and a feedback loop can be connected (for monitoring downstream relays and contactors) (input Y).
Important!
Faults on the start button or in the feedback loop are not detected. This can lead to unintentional
automatic starting.
On devices with start button and feedback loop, safety outputs are switched on only when the start button is pressed
and the feedback loop is closed. Start button and feedback loop must be closed for at least 500 ms.
The monitoring output OUT is switched on as soon as guard locking is active. The status of the feedback loop or the start
button has no influence on this (see also chapter
