Moxa WDR-3124A-EU-T [16/94] Wiring the redundant power inputs

WDR-3124A Introduction

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Wiring the Redundant Power Inputs

The top two pairs of contacts of the 10-contact terminal block connector on the WDR-3124A’s top panel are

used for the WDR-3124A’s two DC inputs. Top and front views of the terminal block connector are shown here.

1. Insert the negative/positive DC wires into the V-/V+ terminals.

2. To keep the DC wires from pulling loose, use a small flat-blade screwdriver to

tighten the wire-clamp screws on the front of the terminal block connector.

3. Insert the plastic terminal block c

onnector prongs into the terminal block receptor,

which is located on the WDR-3124A’s top panel.

ATTENTION

Before connecting the

WDR-3124A to the DC power inputs, make sure that the DC power source voltage is

stable.

Wiring the Relay Contact

The WDR-3124A has one relay output, which consists of the two contacts of the terminal block on the

WDR-3124A’s top panel. Refer to the Specification section for detailed electrical requirement. The relay

contacts are used to indicate user-configured events. The two wires attached to the relay contacts form an

open circuit when a user-configured event is triggered. If a user-configured event does not occur, the relay

circuit will be closed.

Wiring the Digital Inputs

The WDR-3124A has two sets of digital inputs—DI1 and DI2. Each DI comprises two contacts of the 6-pin

terminal block connector on the WDR-3124A’s top panel. Refer to the Specification section for detailed

information on isolated digital input definition.