Fiber Repeaters
Original instructions
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Grounding a Modbus Plus Fiber Repeater
Step
Action
1
Connect the Repeater to the site ground
Result: The Repeater obtains itīs 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 itīs 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 itīs 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 itīs 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 have 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.