User's Manual

C-6 Installation
C.4 Connecting PSU to Resident Units to Power Dome Lights
As noted, the T3-PSU-4 external Power Supply Unit is a 24VDC, 4A continuous power supply
that powers multiple Dome Lights. Before making any connections with the PSU, first refer to
the table on page C-3 to determine the number of PSUs required for the system. A 2-pin
connector with pigtails is provided for connecting the dome light module to the power supply.
The PSU connects to additional Resident Units using a 1-pair 18-gauge stranded cable, with no
shield (West Penn 224 or equivalent).
1. Splice the +24V wire (RED) from the CHAP-T3-PSU-EXT to the red pigtail wire.
2. Splice the Ground wire (BLACK) from the CHAP-T3-PSU-EXT to the black pigtail
wire.
3. Plug the 2-pin connector to the power terminals on the Dome Light Module of the
Resident Unit shown in the diagram below.
4. Cap off the unused YELLOW, BLUE, ORANGE, and GRAY wires of the CHAP-T3-
PSU-EXT.
5. Run the cable to the next Resident Unit and splice it to the appropriate terminals. Repeat
this step for each subsequent Resident Unit.
Note: If another PSU is required along the Resident Unit line, the connections for the subsequent
Resident Units are the same.