The 24 VAC supply power terminal block is a gray, removable, 2-terminal plug that fits into a board-mounted jack on the upper left of the ZEC/BYP controller. Wire the 24 VAC supply power wires from the transformer to the terminal plug as shown on the following figure.
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.
Figure 1. VAC Supply power terminal block wiring
| Calllout | Description |
|---|---|
|
1 |
Supply power terminal block jack |
|
2 |
Supply power terminal block plug |
|
3 |
Wires from Johnson Controls 90 VAC to 24 VAC, Class 2, power transformer |
Important: The 24 VAC power should not be shared with other network devices. Sharing power with other network devices may cause noise, interference, and ground loop problems. You may damage the controller by sharing power with other devices.