Extreme networks 12802 Benutzerhandbuch

BlackDiamond 12800 Series Switches Hardware Installation Guide

You must be running ExtremeWare XOS version 11.3 or later for the system to recognize the DC PSU.

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)

The input DC cable for the DC PSU is supplied with the 1200 W DC PSU (see 

); you must use 

this cable with the DC PSU.

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

2

) copper-stranded wire on cable ends 

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.

Return

Black: Return

Green/yellow:

Ground

Blue: -48V

Lock

Ground

10 ft.

-48Vdc