InstallationCopyright © 2007-2010 Eaton Corporation. All Rights Reserved.IPN 997-00012-62E June 2010 19" Protective earthing conductor to protective earth wire in building.Step 4 - Check Output Reference to GroundThe grounding arrangement of your communications equipment determines how thedc common of the dc power system is referenced to ground.The dc output of the RM3-400/410/420 is "floating" (not bonded to ground).If the grounding policy at the site requires that the dc supply must be bonded toground, then this connection must be made external to the RM3-400/410/420.Procedure completeTask 4 - Connect Input/Output Cabling (some models only)This task only applies to RM3-410 and RM3-420 models (see Model Numbers on page 2) in thefollowing circumstances:• The RM3-410 or RM3-420 is to be connected to an RM3-400 extension power shelf (seedetails on page 23 ), or• The RM3-410 or RM3-420 is fitted with an input/output (I/O) board (see Input/OutputBoard on page 67) and connection to external sensors/devices is necessary.Step 1 - Remove top coverSee the diagram on page 3.Step 2 - Connect RJ45 patch cable (if required)If the RM3-410 or RM3-420 is to be connected to an RM3-400 extension power shelf:1 Connect an RJ45 patch cable to a spare RJ45 socket (S1, S2 or S3) on the voltagefeed module. See the diagram on page 3.2 Feed the patch cable through the I/O cable entry hole ready to be connected tothe extension power shelf (see details on page 23).
