Power requirements, Terminating resistors, Power requirements terminating resistors – Rockwell Automation 1440-ACNR XM ControlNet Adapter User Manual
Page 13: Multiple power sources are not allowed
Publication ICM-UM001C-EN-E - March 2013
13
Install the Adapter Chapter 2
Power Requirements
The ControlNet adapter module requires a single Class 2 power supply. Before
installing your module, calculate the power requirements of all modules in each
chassis. The total current draw through the side connector cannot exceed 3 A.
The adapter provides a maximum output current of 3A.
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.
•
The ControlNet adapter has an internal terminating resistor. Install a
second terminating resistor across the CAN_HI and CAN_LO
terminals of the XM module at the other end of the XM Bus. For
information on the XM module, refer to the Dynamic Measurement
Module User Manual, publication
ICM-UM002
.
ATTENTION
Multiple power sources are not allowed.
31865
24 V
24 V COM
Supply
XM
®
XM
®
24 V COM
24 V
1
1
1
1
1
1
1
CAN HIGH
XM BUS COMMON
DRAIN WIRE
CAN LOW
Termination
resistor
121 ohm, 1%,
1/4W
Class 2