Labconco Guardian 500 Airflow Monitor - Manual (Page 5)

5
External Connections -- the alarm unit will have the following connection points :-
External Alarm --- volt free relay input ( close contact to activate the input )
Alarm Disable --- volt free relay input ( close contact to activate the input )
Sash High Input: a. Connection point for Sash High micro switch.
( Switch contact to close and remain closed in
Sash High condition )
b. Connection point for Sash High proximity switch.
( Switch contact to close and remain closed in
Sash High condition )
Note:- Use input a. OR input b. for the Sash High alarm
Output 1 --- volt free relay output for Low Air Alarm
Power supply --- low voltage DC power supply