User manual

Publication 1747-UM011F-EN-P - May 2007
System Installation Recommendations 63
Grounding Guidelines
In solid-state control systems, grounding helps limit the effects of
electrical noise due to electromagnetic interference (EMI). The ground
path for the SLC 500 controller and its enclosure is provided by the
equipment grounding conductor.
Connect Equipment Grounding Conductor to Ground Bus
Ground connections should run from the chassis and power supply
on each SLC 500 controller and expansion unit to the ground bus.
Exact connections will differ between applications.
Size M4 or M5 (#10 or #12) Internal
Star Washer
Metal Panel
(Must be connected
to earth ground.)
Scrape paint off panel to insure
electrical connection between
chassis and grounded metal panel.
Chassis
Mounting Tab
4M or 5M (#10 or #12 phillips
screw
5.2 mm
2
(10
AWG) to Ground Bus
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 SLC 500 controller system.