Grounding a Modbus Plus Fiber Repeater

Step

Action

1

Connect the Repeater to the site ground

Result: The Repeater obtains it´s ground through the chassis ground screw or DC (-) wire.

2

Use a continuity tester to verify, that the repeater is grounded to the site ground.

Connecting AC Power to the Repeater

Step

Action

1

Remove the power at it´s source.

2

If necessary install a different plug on the cable for the power source at your site.

Note: The AC power cable supplied with the repeater is keyed for North American 110-120 VAC outlets.

3

Remove the AC power cable from the repeater

4

Set the power selector plug to the 110-120 VAC or 220-240 VAC position for the power source at your site. To do this:

  1. Remove the power selector plug by prying under it´s tab using a small screw driver.

  2. Set the plug to the proper voltage position as shown on the plug body.

  3. Reinsert the plug.

5

Insert the AC power cable in the rear panel connector.

6

Insert the AC power cable into the power source.

Connecting DC Power to the Repeater

Step

Action

1

Remove the power at it´s source.

2

Connect the source to the DC power terminals, observing the proper polarity.

RIO Shield-to-chassis Switch

RIO cable shield must be set to specify the NRP relationship to chassis ground. Jumper switch is shipped in neutral position as indicated on the picture below:

It has to be placed:

Switch position

Function

1

NRP acts as a drop on CRP side (RIO cable shield is isolated from chassis ground by a capacitor) -i.e if low frequency is a problem.

2

NRP acts as a head on CRA side (RIO cable shield is connected directly to chassis ground) - i.e. the same ground as the main RIO head.