Installation guide

Testing and Maintaining an RIO Network
132
890 USE 101 00 October 2006
Coax RIO System Network Integrity
Overview A battery of up to eleven tests can be performed to ensure reliability of the RIO
system. These tests are generally performed in the order described below.
RIO network certification services are available from Modicon. Factory authorized
personnel qualified to perform certification may be contracted through:
Square D Services - Automation
1960 Research Drive
Troy, MI 48083
Telephone - 1-888-SQUARED
Fundamental
RIO System
Tests
Tests 1 ... 7 are the minimum recommended tests for Modicon RIO networks.
Test 1 Pre-installation Cable Test
Performed while the cable is still on the reel, this test includes:
z Attenuation sweep test
z Return loss sweep test
z Attenuation measurements test
z TDR test
Modicon and Comm/Scope cables are pretested and do not need to be retested
unless shipping damage is suspected or unless you prefer to test all cable on-site
before installation.
Test 2 Visual Inspection
A check of the entire network including but not limited to:
z Tap installation
z Cable installation
z Cable routing
z Grounding
z Connector installation
Test 3 Induced Voltage Test
A check for any potentially hazardous AC voltages on the cable system.
Test 4 Grounding Test
A check for potential problems with the cable shields and verify system grounding to
a low impedance earth ground.
Test 5 Oscilloscope Noise Analysis
Determines the noise level—i.e., whether power spikes are present. Typically the
noise level should not exceed 20 mV.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com