Operating Instructions
Transponder-Coded Safety Switch CTP-L.-AS1
8
(translation of the original operating instructions) 2124662-03-05/18
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 (multi-
code) 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
detection, 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 possesses a low coding level.
When the guard is closed, the actuator is moved into the safety switch. When the switch-on distance is reached, power is
supplied to the actuator by the switch and data are transferred.
If the guard is closed, guard locking is effective and the code is permissible, each CTP-AS transmits a switch-specific, unique
safety code sequence with 8 x 4 bits via the AS-Interface bus.
The zero sequence is transmitted via the AS-Interface bus when the guard is unlocked.
In the event of a fault in the safety switch, the zero sequence is transmitted via the AS-Interface bus and the LOCK/DIA LED
illuminates red. The occurrence of faults is detected at the latest on the next demand to close the safety outputs (e.g. on
starting).
6.1.
Guard locking on version CTP-L1
(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!
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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.
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To ensure safe control of the guard locking, the auxiliary power must be shut down.
The actuator cannot be pulled out of the switch and the guard is locked as long as the guard locking pin is extended.
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.
Transponder-coded
actuator
Guard locking pin
