Allen-Bradley 1440-SDM02-01RA, User Manual, Page: 20 / 168

20 Rockwell Automation Publication 1440-UM001D-EN-P - September 2016
Chapter 1 Install the XM-124 Standard Dynamic Measurement Module
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
Ripple <100 mV pp
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 the Power Supply Solutions Application Technique, publication
ICM-AP005 , for guidance in designing 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
8 AWG wire
To earth ground
Din rail grounding block A-B
catalog number 1492-WG10