SLC 500™ Modular Chassis
Connect Equipment Grounding Conductor to Ground Bus
Connect an equipment grounding conductor directly from each chassis to an individual bolt on the ground bus.
• use 2.54 cm (1in) copper braid or 5.2 mm2 (10 AWG) copper wire to connect each chassis, the enclosure, and a central ground bus mounted on the back-panel
• use a steel enclosure to guard against electromagnetic interference (EMI)
• make sure the enclosure door viewing window is a laminated screen or a conductive optical substrate (to block EMI)
• install a bonding wire for electrical contact between the door and the enclosure; do not rely on the hinge
Connect Ground Bus to Grounding-Electrode System
The grounding-electrode system is at earth-ground potential and is the central ground for all electrical equipment and ac power within any facility.
Use a grounding-electrode conductor to connect the ground bus to the grounding-electrode system.
Use at minimum 8.3 mm2 (8 AWG) copper wire for the grounding-electrode conductor to guard against EMI.
The National Electrical Code specifies safety requirements for the grounding-electrode conductor.
Install the Chassis Interconnect Cable (optional)
To connect up to three chassis together (for a maximum of 30 I/O slots), install the chassis interconnect cable before attaching your power supply.
Install Your I/O Modules and Attach Your Power Supply
Use the installation instructions/user manuals for your modules to install them into the chassis. Use the installation instructions for your power supply to attach it to your chassis.
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