Extreme Networks Summit X150 Series Hardware Installation Manual page 241

7 Energize the DC circuit.
Leave the ESD strap permanently connected to the rack, so that the strap is always available when you
need to handle ESD-sensitive components.
Connecting the Model 10933 or 10934A DC power supply to a -48V source
To connect the DC power input cables on the Model 10933 or 10934A power supplies to a -48V source:
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 off the terminal block
242).
4 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 –48V).
Summit Family Hardware Installation Guide
(Figure 217: Connecting the DC Power Cables (Part 1)
Installing Summit Family Switches
on page
241