Rockwell Automation 1440-RMA00-04RC XM-440 Master Relay Module - Manual (Page 21)

Rockwell Automation Publication GMSI10-UM009D-EN-P - June 2011
Installing the XM-440 Master Relay Module 21
For more information on the DeviceNet installation, refer to the ODVA
Planning and Installation Manual - DeviceNet Cable System, which is available
on the ODVA web site (http://www.odva.org).
Switch Input Grounding
The Switch Input circuits are electrically isolated from other circuits. It is
recommended that the Switch RTN signal be grounded at a single point.
Connect the Switch RTN signal to the XM terminal base (Chassis terminal) or
directly to the DIN rail, or ground the signal at the switch or other equipment
that is wired to the switch.
Mounting the Terminal
Base Unit The XM family includes several different terminal base units to serve all of the
XM modules. The XM-942 terminal base, Cat. No. 1440-TB-C, is the only
terminal base unit used with the XM-440.
The terminal base can be DIN rail or wall/panel mounted. Refer to the
specific method of mounting below.
DIN Rail Mounting
Use the following steps to mount the XM-942 terminal base unit on a DIN rail
(A-B pt no. 199-DR1 or 199-DR4).
ATTENTION
Use of a separate DeviceNet power supply is not
permitted. See Application Technique "XM Power Supply
Solutions", publication ICM-AP005A-EN-E, for guidance
in using XM with other DeviceNet products.
ATTENTION
The XM modules make a chassis ground connection
through the DIN rail. Use zinc plated, yellow chromated
steel DIN rail to assure proper grounding. Using other
DIN rail materials (e.g. aluminum, plastic, etc.), which can
corrode, oxidize or are poor conductors can result in
improper or intermittent platform grounding.
You can also mount the terminal base to a grounded
mounting plate. Refer to Panel/Wall Mount Grounding on
page 18.