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
a 300 W DC Power Supply on page 475.
Connecting DC Power Cables to a 300 W DC Power Supply
Your Summit 300 W DC power supply (part no. 10933 or 10944) can connect to both +24 V and -48 V
power sources. The connection instructions are dierent depending upon the power source voltage.
For connection instructions, refer to the appropriate topic:
• Connecting the DC Power Cables to a +24 V Source on page 475
• Connecting the DC Power Cables to a -48 V Source on page 477
Connecting the DC Power Cables to a +24 V Source
To connect the DC power cables for the 300 W Summit DC power supply (part no. 10933 or 10944) to a
+24 V source, follow these steps:
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. Verify that the ground wire is attached to the power supply.
See Connecting the Ground Wire to a 300 W DC Power Supply on page 474.
4. Slide the cover
o the terminal block.
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 (–24 V) under the captive square washer on the
negative terminal (labeled –24 V).
Replacing DC Power Supplies
Connecting DC Power Cables to a 300 W DC Power
Supply
Summit Family Hardware Installation Guide 475