Rockwell Automation 1440-VLF02-01RA XM-121 Absolute Shaft Module - Manual (Page 29)

Publication GMSI10-UM014D-EN-P - May 2010
Installing the Absolute Shaft Module 21
Connecting the Power Supply
Power supplied to the module must be nominally 24 Vdc (±10%) and must be
a Class 2 rated circuit.
Wire the DC-input power supply to the terminal base unit as shown in Figure
2.8.
Figure 2.8 DC Input Power Supply Connections
Connecting the Relays
The XM-121 has both Normally Open (NO) and Normally Closed (NC) relay
contacts. Normally Open relay contacts close when the control output is
energized. Normally Closed relay contacts open when the control output is
energized.
-
24V dc
Power
Supply
+
-
IMPORTANT
A Class 2 circuit can be provided by use of an NEC Class 2
rated power supply, or by using a SELV or PELV rated
power supply with a 5 Amp current limiting fuse installed
before the XM module(s).
IMPORTANT
24Vdc needs to be wired to terminal 44 (+24 V In) to
provide power to the device and other XM modules linked
to the wired terminal base via the side connector.
ATTENTION
The power connections are different for different XM
modules. Refer to the installation instructions for your
specific XM module for complete wiring information.