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8.3 Connection of external contactors
External contactors can be integrated in the automatic or manual operating mode�
The contactors have to be connected in series between the supply voltage and pin
4 of the receiver (→ 8 Operating modes / table, fig. B ).
With manual function a start button has additionally to be switched in series
(→ 8 Operating modes / table, fig. D).
8.4 Test function
For the test function the photoelectric safety sensors can e�g� be tested by a
process control system or a control module (→ 7.1 Table
Configuration protected
area width)�
The test pulse interrupts the light emission by the transmitter and the outputs carry
a 0 signal (→ 10.1 Switching states of the outputs).
The minimum duration of the test command is 4 ms�
8.4.1 Internal test function
Type 4 safety light curtains continuously perform internal tests� The faults are
detected within the response time of the respective model leading to switch-off
(response times → 12 Technical data).
9 Operating and display elements
transmitter
receiver
1: LED 3 colours (red/green/orange)
2: LED 2 colours (yellow/blue)
3: LED 2 colours (red/green)
