Rockwell Automation 1440-TB-A XM-940 Dynamic Measurement Terminal Base User Manual
Page 12
12 XM-940 Dynamic Measurement Terminal Base
Publication
GMSI10-IN020C-EN-P - October 2013
Transducer Grounding
Make certain the transducers are electrically isolated from earth ground. Cable
shields must be grounded at one end of the cable, and the other end left
floating or not connected. We recommend that where possible, the cable
shield be grounded at the XM terminal base (Chassis terminal) and not at the
transducer.
DeviceNet Grounding - XM-120, XM-121, XM-122, and XM-123 Modules
The DeviceNet network is functionally isolated and must be referenced to
earth ground at a single point. XM modules can not be used with an external
DeviceNet power supply. Connect DeviceNet V- to earth ground at one of
the XM modules, as shown in the illustration below.
Grounded DeviceNet V- at XM Module
IMPORTANT
The 24V Common and Signal Common terminals are internally connected.
They are isolated from the Chassis terminals unless they are connected to
ground as described in this manual. See
on page 17 for terminal
assignments.
ATTENTION
Use of a separate DeviceNet power supply is not permitted. See the XM Power
Supply Solutions Application Profile, publication
, for guidance in
using the XM module with other DeviceNet products.
To
Ground
Bus