EUCHNER CETx-AR-xxx-CH-xxx (Multicode) - Manual (Page 9)

Operating Instructions Safety Switch CET.-AR-...-CH-...
9
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).
Mechanical release and mechanical key release
(can be retrofitted)
Important:
Ì The mechanical release is not a safety function.
Ì The machine manufacturer must select and use a suitable release (escape
release, emergency unlocking, etc.) for a specific application. A risk assess-
ment appraisal is required for this purpose. It may be necessary to take
specifications from a product standard into account.
Ì The mechanical key release must not be used to lock the switch during main-
tenance work to prevent activation of guard locking, for example.
Ì The correct function must be checked at regular intervals.
Ì Loss of the release function due to mounting errors or damage during
mounting.
Ì Check the release function every time after mounting.
Ì Loss of the release function due to tension on the actuator. The door must
not be under tension during release.
Ì Please observe the notes on any enclosed data sheets.
The mechanical release can be used to unlock guard locking, irrespective of the
state of the solenoid.
Using mechanical release
1. Unscrew locking screw
2. Using a screwdriver, turn the mechanical release by around 180° in the di-
rection of the arrow
¨ The safety device can be opened
The mechanical release must be returned to its original position and sealed after
use (for example with sealing lacquer).
16,7
5,8
20
30
35,
5
Ш