Wiring General - Delta DAC-1600 Installation Manual

Delta Controls

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.
Power
This product is designed to use a 24 VAC, Class 2 power supply. The proper specified cabling must be used.
(18 – 16 AWG, 2-conductor wire)
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).

Each controller is grounded as shown in the diagram below. This is important to protect equipment and
ensure a common ground reference for RS-485 communications.

The transformer secondary is fused for its maximum rated load (4A max for Class 2 circuits).
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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

Apply minimum 6.0 lb-in torque for tightening field wires into the terminal
blocks