EUCHNER CETx-AR-xxx-AH-xxx (Unicode) - Manual (Page 8)

Operating Instructions Safety Switch CET.-AR-...-AH-...
8
Version CET4-AR, guard locking by solenoid force with door moni-
toring output
Function as for CET2-AR, however here the door position is also monitored. The
door monitoring output OUT D is switched on as soon as the actuator protrudes
beyond the extended lift tappet (state: door closed, guard locking not active). The
output OUT D also remains switched on when guard locking is active.
Start button and feedback loop (optional)
A start button and a feedback loop can be connected (for monitoring downstream
relays and contactors).
Important:
Faults on the start button are not detected. This can lead to unintentional auto-
matic starting.
On devices with start button and feedback loop, safety outputs OA and OB 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.
Monitoring output OUT is switched on as soon as guard locking is active. The status
of the feedback loop has no influence on this (see section System status table).