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Operating Instructions

Transponder-Coded Safety Switch CTP-LBI-AP

(translation of the original operating instructions) 2136918-04-05/19

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.

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.

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 a permissible code is detected, the safety outputs

are switched on.

The safety outputs

and the monitoring output (OL) are switched off when the guard is unlocked.

In the event of a fault in the safety switch, the safety outputs are switched off and the DIA LED illuminates red. The oc-

currence of faults is detected at the latest on the next demand to close the safety outputs (e.g. on starting).
The switch has, in addition to the mechanical/electromagnetic guard locking, fixing for the guard locking pin. The guard

locking pin is held in its current position if the operating voltage is not present. The guard locking pin can be moved only

by applying the operating voltage.
If the guard locking pin is extended and the guard is still open when the power supply is interrupted, the guard locking pin

will be pushed down and held in this position the next time the door is closed.
In case of interruption of the power supply (operating voltage) for the switch or if the machine is switched off for servicing,

for example, the guard locking pin is held in its last position. As a result the safety door is either permanently locked or it

can be closed and opened as often as required without the guard locking pin locking.

6.1.

Guard locking monitoring

All versions feature two safe outputs for monitoring guard locking. The safety outputs (FO1A and FO1B) are switched

off when guard locking is released.

6.2.

Door monitoring output (OD)

The door monitoring output is switched on as soon as the actuator is inserted in the switch head (state: guard closed and

not locked). The door monitoring output also remains switched on when guard locking is active.

6.3.

Diagnostics output (OI)