Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 19)

Rockwell Automation Publication 1440-UM001C-EN-P - May 2014 19
Install the XM-124 Standard Dynamic Measurement Module Chapter 1
Grounding Requirements
Use these grounding requirements to be sure of safe electrical operating
circumstances, and to help avoid potential EMI and ground noise that can cause
unfavorable operating conditions for your XM system.
DIN Rail Grounding
The DIN rail must be connected to a ground bus or grounding electrode
conductor using (8.4 mm
2
) 8 AWG or 1-in. copper braid. The grounding wire
can be connected to the DIN rail using a DIN rail grounding block.
Figure 3 - DIN Rail Grounding Block
1 Use 8.4 mm

(8 AWG) wire.
Output Noise Per EN50081-1
Overshoot < 3% at turn-on, < 2% at turn-off
Hold-up Time As required (typically 50 mS at full rated load)
(1) When a fused supply is used, the fuse must be a 5 A, listed, fast-acting fuse such as provided by Allen-Bradley part number 1440-
5AFUSEKIT.
IMPORTANT See XM Power Supply Solutions Application Technique, publication ICM-AP005 ,
for guidance in architecting power supplies for XM systems.
ATTENTION: This product is grounded through the DIN rail to chassis ground.
Use zinc-plated yellow-chromate steel DIN rail to assure proper grounding. The
use of other DIN rail materials (for example, aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or intermittent
grounding. Secure DIN rail to mounting surface approximately every 200 mm
(7.8 in.) and use end-anchors appropriately.
XM Power Supply Requirements
1