Operating Instructions
Transponder-Coded Safety Switch CTM-LBI-BR
8
(Translation of the original operating instructions) 2525462-01-01/20
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 assign-
ment ensures a particularly high level of protection against tampering. The system thus
possesses a high coding level.
When the guard is closed, the actuator is moved into the safety switch. When the operating
distance is reached, power is supplied to the actuator by the switch and data are transferred.
OD is set when a permissible code is detected. Guard locking is activated automatically if no
voltage is present at IMP. The safety outputs are switched on when guard locking is active.
The safety outputs and the monitoring output (OL) are switched off when the guard is released.
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 close the safety outputs (e.g. on starting).
6.1. Bistable guard locking
Guard locking of the switch functions according to the bistable principle. This means that guard locking is kept in its last
position if the power supply is interrupted or when the machine is switched off for servicing, for example. As a result the
safety door is either constantly locked or it can be closed and opened as often as required without activating the guard lock-
ing. Guard locking is released via control input IMP. Also see chapter 6.6. Guard locking on version CTM-LBI on page 9.
6.2. Guard lock 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.
6.3. Door monitoring output (OD)
The door monitoring output is switched on as soon as the actuator is inserted into the switch (state: guard closed and not
locked). The door monitoring output also remains switched on when guard locking is active.
6.4. Diagnostic output (OI)
Evaluation via the BR evaluation unit.
The diagnostic output is switched on in the event of a fault (switch-on condition as for DIA LED).
6.5. Guard locking monitoring output (OL)
Evaluation via the BR evaluation unit.
The guard locking monitoring output is switched on when guard locking is active.
Transponder-coded
actuator
Safety switch
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