Perle Systems STS, SCS DC Power Models, Primary Supply, Secondary back-up Supply, Earthing Wire

Powering Up the IOLAN

DC Power Models

To power up the IOLAN with DC power requirements, perform the following steps:

1.Verify that the power switch on the IOLAN unit and the power source is in the Off position.

2.Connect the primary and secondary DC input using the following specifications:

a.Use wire gauge 20 to 22 AWG.

b.Strip insulation 7mm from wire ends. (If using stranded wire, twist all strands together to ensure all wire strands are used for the connection.)

c.Connect supply with reference to the terminal block diagram and electrical specifications:

Earthing wire

Secondary Supply: Negative (-) wire

Secondary Supply: Positive (+) wire

Primary Supply: Negative (-) wire

Primary Supply: Positive (+) wire

DC Power Supply

Note: When connecting only a single power supply source, ensure the connection is the primary supply and the secondary terminals are left unconnected.

Primary Supply:

Positive (+) wire to Circuit 1, terminal marked +

Negative (-) wire to Circuit 1, terminal marked -

Secondary (back-up) Supply:

Positive (+) wire to Circuit 2, terminal marked +

Negative (-) wire to Circuit 2, terminal marked -

Note: When connecting dual power supply sources, the IOLAN supports a common positive (+) circuit arrangement ONLY.

Earthing Wire:

Ground wire to terminal marked with circular earthing symbol.

Screws:

Tighten terminal connector block screws to 7 lbs-inches torque.

3.Switch On the power supplies.

4.Switch On the IOLAN. (The power LEDS 1 and 2 will indicate the status of the power source at the respective input. If both the primary and secondary power source are available, both LED 1 and LED 2 will be luminated indicated power detected from each input.)

40 IOLAN SDS/SCS/STS User’s Guide, Version 3.6