The 24 VAC supply power terminal block is a gray, removable, 3-terminal plug that fits into a board-mounted jack on the top right of the controller.
Wire the 24 VAC supply power wires from the transformer to the HOT and COM terminals on the terminal plug as shown in Figure 1. The middle terminal on the supply power terminal block is not used. See Table 1 for more information about the Supply Terminal Block.
Figure 1. 24 VAC Supply Power Terminal Block
Note: The supply power wire colors may be different on transformers from other manufacturers. Refer to the transformer manufacturer’s instructions and the project installation drawings for wiring details.