24
9.1 LED states
The blue LED is lit when the signal is weak (→ 6.5.1 Optical alignment).
Description
transmitter
receiver
LED
LED
LED
red
green orange red
green yellow blue
Activating the system,
input test
Fault
(→ 13 Troubleshooting)
Test condition
Normal operating
conditions
*)
Protected area interrupted,
outputs deactivated
Protected area clear,
outputs deactivated,
waiting for restart
Protected area clear,
outputs activated
*) The green LED flashes twice when the system is switched on if the unit has been
configured with a high range�
10 Operation
10.1 Switching state of the outputs
The safety light curtains have two outputs (OSSDs) on the receiver; the status
depends on the condition of the protected area�
All short-circuits between the outputs or between an output and the current supply
(24 V DC or 0 V DC) are detected by the 1 safety light curtains as a fault�
Output
Binary states
Description
OSSD1
1
Condition
protected area clear�
OSSD2
1
OSSD1
1
0
0
Condition
protected area interrupted or fault detected�
OSSD2
0
1
0
