1 = Grounding point 2 = Ground wire
b Tighten the screw to 12.6 in‑lb (1.42 N m).
6 Connect the other end of the wire to a known reliable earth ground point at your site.
7 Connect the power supply to the source, following the instructions in Connecting a 300 W DC Power
Supply to the Source Voltage on page 190.
Connecting a 300 W DC Power Supply to the Source Voltage
Two 300 W DC power supplies are available: model 10933 (front-to-back airflow) and model 10944
(back-to-front airflow). Both can connect to either a +24 V or a –48 V power source.
The connection instructions, starting at step 4 on page 190, are dierent depending upon whether you
are connecting to a +24 V power source or a –48 V power source.
The DC power connection at your facility must be made by a qualified electrician, following these
instructions.
Warning
Always make sure that the DC circuit is de-energized before connecting or disconnecting the
DC power cables on the DC power supply.
Caution
Provide proper connection and strain relief on the DC power cables in accordance with all
local and national electrical codes.
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 Connect the DC power input cables as follows:
When connecting the power supply to a +24 V source:
Installing Your Extreme Networks Switch
ExtremeSwitching and Summit Switches: Hardware Installation Guide 190
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