Installation guide

RIO Network Hardware Components

890 USE 101 00 October 2006 91

Documentation

See the Modicon Fiber Optic Repeaters User’s Guide, part number GM-FIBR-OPT,

for more detailed information.

Repeater

Indicator LEDs

The repeater has a set of LEDs located on the top of the unit:

z The power ok LED illuminates steadily when the Repeater has normal power

from the AC line or DC source and its internal power supply is operating normally

z The remote I/O port LED lights when a signal is received at the RIO port

z Each fiber port LED lights when a signal is received at the fiber Rx port

If a port LED fails to illuminate, it can indicate a lack of transmitted signal at another

network node. Before replacing a repeater, check the cable connections on the rear

panel for a possible incorrect or loose connection. Also check the indicators on other

devices on the signal path to see if the signal loss is external to the repeater.

RIO Shield-to-

Chassis Jumper

The RIO cable shield-to-chassis jumper switch on the rear of the repeater is used to

specify the repeater’s relationship to chassis ground.

It is shipped in the neutral position—i.e., with the switch midway between position 1

and 2. The jumper can be placed in either the 1 or 2 position if the repeater is being

configured as a head repeater on the optical link such that:

z In the 1 position, the RIO cable shield is isolated from chassis ground by a

capacitor—i.e., if low-frequency noise is a problem

z In the 2 position, the RIO cable shield is connected directly to chassis ground—

i.e., the same ground as the main RIO head processor

z In the neutral position, the repeater is configured as a drop on the optical link

power OK fiber port 1 fiber port 2 remote I/O

JP1

neutral

This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com