Velleman HAA2801 - Manual (Page 20)

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Use the Normally Open (N.O.) output contact to shunt a Normally Closed (N.C.) protection
zone of an alarm system.
Set output contact to Start / Stop Mode (Programming Option 52, Output Mode=0).
Use the (N.O.) or (N.C.) output contact to make arm-disarm control of an alarm system.
Consult your alarm control panel manual for the appropriate output contact to be used in arm-
disarm control.
Usually set output 2 to Momentary mode (Programming Option 521, Location 52, Output
Mode=1) for multi station systems and Start / Stop mode (Programming Option 520, Location
52, Output Mode=0) for single station systems.
(F) OUTPUT 2 OR OUTPUT 3
( i ) Shunting an N.C. Zone
( ii ) Alarm System Arm-Disarm Control