Pre-Installation Requirements; Installing The Dc Wiring - Extreme Networks BlackDiamond 8800 Series Hardware Installation Manual

Extreme Networks Power Supply Units for BlackDiamond Switches

Pre-Installation Requirements

You need the following tools and equipment to install or remove a 1200 W DC PSU:
ESD preventive wrist strap
●
Input DC power cable (provided with the DC PSU)
●
-48 V DC power source capable of providing 50 A dedicated power to each of the 1200 W DC PSUs
●
installed in the switch
Thermal protective gloves (required for removal)
●

Installing the DC Wiring

The input DC cable for the DC PSU is supplied along with the 1200 W DC PSU (see
must use this cable with the DC PSU.
Figure 82: Input DC power cable for the 1200 W DC PSU
Return
-48Vdc
Ground
Each 1200 W DC PSU must be powered by a 50 A dedicated power source that delivers -40 to -72 VDC
of constant power. Power distribution to the 1200 W DC PSU shall be provided using the -48 VDC
harness provided. Power to the 1200 W DC PSU 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 connector end has a locking mechanism that locks onto the DC PSU to
prevent accidental removal of the input DC cable.
If necessary, use appropriate termination lugs for 8 AWG (10 mm
of 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.
140
Lock
10 ft.
2
) copper-stranded wire on cable ends
Extreme Networks Consolidated ExtremeXOS Hardware Installation Guide
Figure 82); you
Black: Return
Blue: -48V
Green/yellow:
Ground
EX_135