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2TLC172287M0201 Rev B
29 www.abb.com/jokabsafety
2015-09-17
7 Functions
7.1 Reset function
The interruption of a beam by an opaque object causes the OSSD outputs to switch off ( ) .
The AOPD can be reset to the OSSD ON state (LED on) in two different ways:

Automatic Reset
When activated, the AOPD returns to OSSD ON once the object has been removed from the detection zone.

Manual Reset
When activated, the AOPD returns to OSSD ON once the RESET button has been pushed, provided that the
object has been removed from the detection zone. The condition when the object has been removed and the
system is waiting for reset is called interlock and is signalled on the display (see paragraph 8.2
– “Diagnostic
messages
”).
Warning! Carefully assess risk conditions and reset modes. In applications protecting access to hazard zones, the
Automatic Reset function is unsafe when the operator can stand in the hazard zone without being detected. In this
case, the Manual Reset of the AOPD or the safety relay is necessary (see paragraph 5.3
– “Important notes on
connections
”).
Figure 26
– Time chart of the Manual Reset function
Select either Automatic or Manual Reset by connecting pin 8 of the RX connector according to paragraph
5
– “Electrical connections”).