User guide

10 Installation Guide

Apply Power to the Chassis

IMPORTANT

• Turn off the DC voltage source before beginning.

• Connect the wire leads to the chassis before applying power.

The DIN rail chassis provides two input power supply connections,

PWR A and PWR B. The two power supplies support redundant power,

however, there is no load distribution. With redundant power, if the

source to PWR A or B fails, the other source automatically provides the

entire power load for the chassis. An input power supply may be

removed or replaced without interrupting chassis operations as long as

the other input is providing power.

Power connectors are located below the front panel of the main housing

unit. The inputs have screw-down terminal blocks that support 24 V

DC at 0.75 A. Connect the chassis only to a UL listed Class “2” or LPS

power source.

24VDC

.75A

CLASS 2

24VDC

.75A

CLASS 2

PWR A

PWR B

—

• Connect the wire leads from the voltage source to the appropriate

terminals and tighten the screws. For redundant power, connect each

power supply to a separate power source.

• Verify proper connection and operation using the PWR LED on the

installed card(s).

Caution: The center terminal connector provides grounding for the

chassis and must be maintained.