Rockwell Automation 1440-TB-B XM-941 Speed/Position Terminal Base - Manual (Page 12)

12 XM-941 Speed/Position Terminal Base
Publication GMSI10-IN021A-EN-P - May 2010
Switch Input Grounding
The Switch Input circuits are functionally isolated from other circuits. It is
recommended that the Switch RTN signal be grounded at a single point.
Connect the Switch RTN signal to the XM terminal base (Chassis terminal) or
directly to the DIN rail, or ground the signal at the switch or other equipment
that is wired to the switch.
Mounting on the DIN Rail
You can also mount the terminal base to a grounded mounting plate. Refer to
the XM Module User Guide for details.
1. Position the terminal base unit on the 35 x 7.5mm DIN rail (A) (A-B
pt no. 199-DR1 or 199-DR4) at a slight angle.
ATTENTION
The XM-941 makes a chassis ground connection through the DIN rail. Use zinc
plated, yellow chromated steel DIN rail to assure proper grounding. Using
other DIN rail materials (e.g. aluminum, plastic, etc.) which can corrode,
oxidize or are poor conductors can result in improper or intermittent platform
grounding.
Position terminal base at a slight angle and hook over the top of the DIN rail.