6.8 Connecting the light barrier (Safety 2)
Light barriers are available in two models: DIP switch 2 must be set
accordingly:
• to “OFF”: light barriers with NC contact (1); or
• to “ON”: 2-wire light barriers (2)
One light barrier monitors the doorway. As soon as it is interrupted
(e.g., by a car or person), the control unit stops the operator or
changes the direction of travel; the setting on DIP switches 3 and 4
and the automatic close setting determine how the control unit
responds; see Chapter 6.15 “Operator response to detected obsta-
cle”.
The function of the light barrier is tested by the control unit after the
door reaches its end position.
If the light barrier is interrupted, faulty or not connected, dead man
operation is automatically activated; see Chapter 4.1 “Activating dead
man operation”. Safety LED flashes twice intermittently.
Place bridge between terminals 29 and 31 if a light barrier is not
connected. Set DIP switch 2 to “OFF”.
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