Can the ADC-AC-LP1501-PSE and ADC-ACC1-17-PSE kits be reconfigured to only use 12VDC?

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Yes. The ADC-AC-LP1501-PSE and ADC-ACC1-17-PSE kits were designed with the option for both 12VDC and 24VDC to provide an installer with the flexibility to choose the right voltage for their install. These kits by default provide 24VDC from an FPV4 power board and 12VDC from the B100 secondary power board. That default configuration then means Fire Alarm Interface (FAI) function will only cut power to the FPV4’s 24VDC.

How the ADC-ACC1-17-PSE and ADC-AC-LP1501-PSE kits are configured by default:

The FPV4 is set to 24VDC.
- Switching the FPV4 to 12VDC while using the PSE kit's default wiring scheme will result in controller performance issues due to insufficient voltage from the B100.
The main DC output provides 24VDC.
- For additional information regarding the use of FAI controller, see How can a Fire Alarm system be connected to the Access Control Power Supply Kit?.
The AUX terminal provides a constant 24VDC to the B100 (24V to 12V) converter.
The B100's accepts the 24VDC voltage from the FPV4 and converts it to 12VDC.
- The B100 has its own set of terminals to provide a main output of 12VDC.
The B100's converted 12VDC is sent to the LP1501 Door Controller.
The PSE kit is prewired to provide 24VDC to the 1-C relay.

While optional, it is highly recommended to connect two 12V batteries in series to provide the FPV4 with 24V of backup power. For additional information regarding the use of batteries with the ADC-AC-LP1501-PSE, see What batteries are recommended for use with the LP1501 PoE Door Controller and Power Supply Kit (ADC-AC-LP1501-PSE)?.

To reconfigure the ADC-ACC1-17-PSE and ADC-AC-LP1501-PSE kits to provide 12VDC:

If your hardware only requires 12VDC and/or FAI cutoff for your 12VDC powered devices, you can adjust your PSE kit using the following configuration:

Important: When making this adjustment you should remove any unused wires from the PSE kit to avoid any unforeseen behaviors or complications.

Set the FPV4 to 12VDC.
The main DC output now provides 12VDC.
- For additional information regarding the use of FAI controller, see How can a Fire Alarm system be connected to the Access Control Power Supply Kit?.
The AUX terminal will now provide the constant 12VDC voltage required by the LP1501 Door Controller.
Leave the PSE kit's prewired connection between the FPV4's main DC out to the LP1501's 1-C relay.
The B100 can remain in the kit or be removed as it no longer used in the configuration. If you decide the leave the B100 in the PSE kit, it is recommended to remove any wires still connected to it from the PSE kit.

While optional, it is highly recommended to connect one 12V battery to provide the FPV4 with 12V of backup power.