Installing A 1200 W Dc Power Supply - Extreme Networks BlackDiamond 8806 Hardware Installation Manual

Installing Power Supply Units in the BlackDiamond 8800 Series Switches
Figure 65: Input DC Power Cable for the 1200 W DC Power Supply
1
2
3
1 = Return 4 = Black: Return
2 = –48 V DC 5 = Blue: –48 V DC
3 = Ground 6 = Green/yellow: Ground
Each 1200 W DC power supply must be powered by a 50 A dedicated power source that delivers -40 to
-72 V DC of constant power. Power distribution to the 1200 W DC power supply shall be provided
using the -48 V DC harness provided. Power to the 1200 W DC power supply can be from either a 50 A
UL-approved overcurrent protection breaker or an SELV- approved power source in accordance with
IEC 60950-1 utilizing 50 A overcurrent protection.
The input DC cable has an input connector on one end and precut wire on the other end that goes to
the DC power source. The input connector has a locking mechanism that locks onto the DC power
supply to prevent accidental removal of the input DC cable.
If necessary, use appropriate termination lugs for 8 AWG (10 mm
the cable to connect to the DC power source.
The blue termination (-48 V) connects to a 50 A overcurrent protection circuit device, and the black
(return) termination connects directly to the RTN bus of the DC power source. The green/yellow
termination (ground) must connect to the same earth ground point as the switch.

Installing a 1200 W DC Power Supply

CAUTION
Be sure that the grounding pad on the back of the switch chassis is securely connected to earth ground.
For information about grounding the switch, see
To install an Extreme Networks 1200 W DC power supply:
1 Press the yellow locking lever to the left as you lift the handle
NOTE
Do not connect the input DC cable to the DC power supply before you install the DC power supply
in the chassis.
106
2
) copper-stranded wire on the ends of
"Grounding the BlackDiamond 8800 Series Chassis" on page
(Figure
BlackDiamond 8800 Series Switches Hardware Installation Guide
4
5
6
66).
95.