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INERTIA-2464 Technical & Programming Manual
INTERNAL 27VDC POWER SUPPLY
If the on-board supply ONLY is being used (JP4 is linked) :
With batteries disconnected and no alarms present, measure voltage across AUX 0V & AUX 24V on
PCB801 and adjust the multi-turn potentiometer VR4 until voltage is 27.6V 1% (27.32V - 27.87V).
(VR1 for 801L5).
Current limiting is factory preset by VR1 and adjustment is not required.
EXTERNAL 27VDC POWER SUPPLY (if fitted)
If an external supply input is being used (link J4 should be cut) :
With batteries disconnected and no alarms present, measure voltage across AUX 0V & AUX 24V on
PCB801 and adjust the voltage on the external power supply untill the AUX voltage is 27.6V 1%.
Current limiting is preset, adjustment is not required.
INTERNAL 5VDC POWER SUPPLY TP4
No adjustments are required, all parameters are preset.
POWER SUPPLY COMPARATOR REFERENCE VOLTAGE TP1
With the panel in the quiescent mode, measure voltage between system 0V and TP1. Adjust multi-turn
potentiometer VR2 until voltage is 7.0V 1%
ALARM THRESHOLD COMPARATOR TP3
With the panel in the quiescent mode, measure voltage between system 0V and TP3. Adjust multi-turn
potentiometer VR3 until voltage is 3.3V 1%
NON ADJUSTABLE TEST POINTS
TP2 = 0.6 VDC 5%
TP4 = 5.0 VDC '5%
(If these test point voltages are not correct, please return the main termination board to the factory for
repair.)
FAULT THRESHOLD
5VDC POWER SUPPLY
Copyright (c) 1996, INERTIA FIRE SYSTEMS
ALIGNMENT AND ADJUSTMENT
Page 9
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