Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual - Manual (Page 102)

Publication 1747-UM003A-EN-P
B-10 Understanding Your SLC 500/1746 Control System
Ground connections should run from the chassis and power supply of each
chassis and expansion unit to the ground bus. Exact connections differ
between applications.
Europe: Reference EN 60204 for safety information on grounding. Also, refer
to Allen-Bradley Programmable Controller Grounding and Wiring Guidelines,
publication number 1770-4.1.
United States: An authoritative source on grounding requirements for most
installations is the National Electrical Code. Also, refer to Allen-Bradley
Programmable Controller Grounding and Wiring Guidelines, publication
number 1770-4.1.
In addition to the grounding required for the adapter and its enclosure, you
must also provide proper grounding for all controlled devices in your
application. Care must be taken to provide each device with an acceptable
grounding path.
Normal Electrical Noise Conditions
Chassis Mounting Tab
Size M4 or M5
(#10 or #12)
Internal Star
Washer
Scrape paint off panel to ensure
electrical connection between
chassis and grounded metal
panel.
Metal Panel (Must be connected
to earth ground)
Tapped Hole (minimum of three
threads)
Size M4 or M5
(#10 or #12)
Hardware
Size M4 or M5
(#10 or #12)
Hardware
Tapped Hole (minimum of thr
threads)
Metal Panel (Must be connected
to earth ground)
Scrape paint off panel to
ensure electrical connection
between chassis and
grounded metal panel.
Size M4 or M5
(#10 or #12)
Internal Star
Washer
5.2 mm2 (10 AWG) to
ground bus
Chassis Mounting Tab
Ground Lug
Severe Electrical Noise Conditions
ATTENTION
!!!!
The 1746 chassis, the enclosure, and other control devices
must be properly grounded. All applicable codes and
ordinances must be observed when wiring the adapter
system.