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4.6.3 Replacing the AX-PSU-6 Power Supply Charger
If replacing the AX-PSU-6 power supply charger remove power (AC and battery) from the system. Remove the AC,
battery, 24 VDC output and relay trouble contact wiring from the AX-PSU-6. Remove the four (4) screws [p]
securing the AX-PSU-6 to the back box and remove the AX-PSU-6 (see figure 28). Position the new AX-PSU-6
module onto the back box standoffs and secure with the four (4) removed screws [p]. Replace the removed AC,
battery, 24 VDC output and relay trouble contact wiring and reconnect AC and battery power to the system.
Failure to tighten the screws will defeat the protection circuitry designed to protect the module from
damage due to lightning and static electricity.
4.7 AX-LPD or AX-NAC Module (available for AX-CTL-2PCB two loop base card
only)
The AX-LPD and AX-NAC modules are expansion modules for the AX-CTL-2PCB base card. The AX-LPD is an
SLC/NAC expansion module providing two (2) SLC loops and two (2) notification appliance circuits. The AX-NAC is
a NAC expansion module providing two (2) notification appliance circuits.
4.7.1 Installing the AX-LPD or AX-NAC Module
Note: The AX-CTL-1PCB one loop base card cannot support the AX-LPD or AX-NAC option modules. In
addition, when utilizing an AX-LPD or AX-NAC option module an AX-PSU power supply may be required if
notification appliance circuit power requirements indicate a need for additional power.
The AX-LPD and AX-NAC modules are supplied with four (4) metal hexagon spacers [h] and four (4) screws [p].
Insert and tighten the four (4) metal hexagon spacers [h] to the AX-CTL base card (see figure 29).
Position the module onto the metal hexagon spacers, while plugging the module into the two (2) 20-pin connectors
on the AX-CTL base card and secure with the four (4) supplied screws [p] (see figure 29). It is critical that these
screws are tightly secured as the two top screws are required for the earth ground connection to the AX-LPD or AX-
NAC module.
Failure to tighten the screws will defeat the protection circuitry designed to protect the module from
damage due to lightning and static electricity.
Figure 28 - AX-PSU-6 Power Supply Charger Module
Mounting Screws
