Installation Guide

3. Insert an M4 screw (provided) through the ring terminal on the ground and into the grounding point
on the power supply.
4. Tighten the screw to 15.9 in-lb (1.8 N-m).
5. Connect the other end of the wire to a known reliable earth ground point at your site.
6. Connect the switch to the DC power source. See the instructions in Connecting DC Power Cables to
an 850 W DC Power Supply on page 486.
Connecting DC Power Cables to an 850 W DC Power Supply
1. Verify that the DC circuit is de-energized.
2. Attach an ESD-preventive wrist strap to your bare wrist and connect the metal end to an
appropriate ground point on the rack.
3. Slide the cover o the terminal block.
4. Verify that the ground wire is attached to the power supply.
See Connecting the Ground Wire to an 850 W DC Power Supply on page 485.
5. Connect the DC power input cables as follows:
a. On each terminal, loosen the screw enough to allow the spade terminal to slide underneath the
captive square washer.
b. Slide the spade terminal of the negative wire (–48 V) under the captive square washer on the
negative terminal (labeled –48 V).
Connecting DC Power Cables to an 850 W DC Power
Supply Replacing DC Power Supplies
486 Summit Family Hardware Installation Guide