Connecting the DC Power Cables to a -48 V Source
To connect the DC power cables for the 300 W Summit DC power supply (part no. 10933 or 10944) to a
-48 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 347.
4. Slide the cover oîš‚ 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 (–48 V) under the captive square washer on the
negative terminal (labeled –48 V).
Connecting DC Power Cables to a 300 W DC Power
Supply Replacing DC Power Supplies
350 ExtremeSwitching Hardware Installation Guide
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