Operating Instructions
Transponder-Coded Safety Switch CET.-AP-…
8
(Translation of the original operating instructions) 2122242-04-05/18
6. Function
The device permits the locking of movable guards.
The system consists of the following components: coded actuator (transponder)
and switch.
Whether the device learns the complete actuator code (unicode) or not (multicode)
depends on the respective version.
Ì
Devices with unicode evaluation
: The actuator must be assigned to the
safety switch by a teach-in operation so that it is detected by the system. This
unambiguous assignment ensures a particularly high level of protection against
tampering. The system thus possesses a high coding level.
Ì
Devices with multicode evaluation
: Unlike systems with unique code detec-
tion, on multicode devices a specific code is not requested but instead it is only
checked whether the actuator is of a type that can be detected by the system
(multicode detection). There is no exact comparison of the actuator code with
the taught-in code in the safety switch (unique code detection). The system pos-
sesses a low coding level.
When the guard is closed, the actuator is moved towards the safety switch. When
the switch-on distance is reached, power is supplied to the actuator by the switch
and data are transferred.
The safety outputs
are switched on when the locking pin is in the recess (state:
door closed and locked) and a permissible code is detected.
When guard locking is released, the safety outputs
and the monitoring output
(OUT) are switched off.
Important!
Ì
CET3 (closed-circuit current principle)
The activation of the guard locking solenoid results in the shutdown of
the safety outputs OA/OB and the monitoring output OUT.
Ì
CET4 (open-circuit current principle)
The interruption (> 5 ms) of the power supply to UCM results in the
shutdown of the safety outputs OA/OB and the monitoring output OUT.
Ì
In both cases the outputs are shut down independent of the actual posi-
tion of the solenoid.
Ì
For more detailed information, see also chapter
10.10. Notes on opera‑
tion with safe control systems on page 22
.
In the event of a fault in the safety switch, the safety outputs are switched off
and the DIA LED illuminates red. The occurrence of faults is detected at the latest on the next demand to switch on the
safety outputs (e.g. on starting).
6.1.
Guard locking monitoring
All versions feature two safe outputs for monitoring guard locking (OA and OB). The safety outputs are switched off when
guard locking is released.
6.2.
Monitoring output (OUT)
The monitoring output is switched on as soon as guard locking is active (state: door closed and locked) and the transponder
has been detected.
Ramp/switch head
Plunger
Ramp
Transponder
Spring-
mounted
guard
locking pin
Recess
