Connect the 24 VAC supply power wires from the transformer to the HOT and COM
power terminals as shown in Figure 1 figure 16.
Note: The supply power wire colors may differ on transformers from other
manufacturers. Refer to the transformer manufacturer’s instructions and the project
installation drawings for wiring details.
Important:
-
- To reduce noise, interference, and ground loop problems, connect a
24 VAC supply power to the controller and to all other network devices so
that transformer phasing is uniform across network devices. The controller
does not require an earth ground connection. However, when you need to
ground the secondary of the 24 VAC transformer, make only one ground
connection near the transformer. For more information, see the following
figure.
Figure 1. Transformer grounding
CAUTION
- Risk of Property Damage
- Do not apply power to the controller before checking
all wiring connections. Short circuited or improperly connected wires may
result in permanent damage to the equipment.