Delta Controls
Page 6 of 12
Wiring General
All wiring must conform to NEC and local codes and regulations. Use earth ground isolating step-down Class 2
transformers. Do not use autotransformers. Determine supply transformer rating by summing total VA of product
and output loads.
Risk of Electric Shock or Fire
More than one disconnect switch may be required to de-energize the
equipment before servicing.
Input Class 2 Power Supplies are interconnected. Use only Class 2
sources suitable for interconnections.
All terminals are acceptable for Class 2 Circuit connections only
Use copper conductors only
Power
This product is designed to use a 24VAC or 24VDC Class 2 power supply. The controller can be powered from
a transformer or from the Service Tool Port of the System Controller if the supplied cable is used. A single
transformer may be used to power multiple controllers and/or auxiliary field devices (actuators, etc.) provided
the following conditions are met:
All devices MUST be ½ wave rectified. Mixing power between ½ wave and full wave rectified devices
will damage both the transformer and connected equipment.
The transformer is properly sized, including line losses for the total VA requirements.
Polarity is observed between controllers (with respect to 24~ and Gnd).
The transformer secondary is fused for its maximum rated load (4A max for Class 2 circuits).
When power is applied to the controller, all of the LCD segments will appear on the
display for a few seconds.
