Moxa PT-508-2MTRJ-48 [8/15] Attention

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Wiring the Relay Contact

The PT-508 has one set of relay output—relay 1. The relay contact

consists of two contacts of the terminal block on the PT-508’s bottom

panel. Refer to the next section for detailed instructions on how to

connect the wires to the terminal block connector, and how to attach the

terminal block connector to the terminal block receptor.

The fault circuit will open if:

1. A relay warning event is triggered, OR

2. The PT-508 is the Master of this Turbo Ring, and the Turbo Ring is

broken, OR

3. Start-up failure.

If none of these three conditions is met, the fault circuit will remain

closed.

Wiring the Redundant Power Inputs (24/48 VDC models)

The PT-508 (24/48 VDC models) unit has two sets of power inputs –

power input 1 and power input 2. Top and front views of one of the

terminal block connectors are shown below.

Take the following steps to wire the redundant power inputs:

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

STEP 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.

STEP 3: Insert the plastic terminal block connector prongs into the

terminal block receptor, which is located on the PT’s bottom panel.

ATTENTION

Before connecting

the PT

to the DC power inputs, make sure the

DC power source voltage is stable.