Rockwell Automation 1440-DYN02-01RJ XM Dynamic Measurement Module - Manuel (Page 23)

Publication ICM-UM002F-EN-E - March 2013 23
Installing the XM Dynamic Measurement Module Chapter 2
Transducer Ground
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. It is recommended that where possible, the cable
shield be grounded at the XM terminal base (Functional Earth terminal) and
not at the transducer.
Terminating Resistors
The XM Bus will operate correctly when there is a terminating resistor at each
end of the XM Bus.
• Terminating resistors must be 121 ohms, 1%, 1/4 W.
• When installing the XM ControlNet adapter, Cat. No 1440-ACNR, with
your XM modules, make sure the adapter is installed at one end of the
network. The XM ControlNet adapter has an internal terminating
resistor.
A second terminating resistor is installed across the CAN_High and
CAN_Low terminals of the XM module at the other end of the XM
network. See
Figure 2.1 on page 19 .