Part Number: 121024-00 Rev 02
1
BlackDiamond DC Power Supply
Installation Note
Overview
This installation note describes the BlackDiamond
™
DC Power Supplies, lists the steps required
to prepare the power supplies and the cabling, explains how to terminate the cabling, and lists
the steps required to remove and replace a power supply.
The BlackDiamond 6808 chassis accommodates two power supplies, and the BlackDiamond
6816 chassis accommodates four power supplies. There are three types of power supplies
available: 110 VAC, 220 VAC, and -48 VDC. All installed power supplies must be of the same
type. This document describes -48 VDC power supply installation only.
Caution: Service to BlackDiamond power supplies should be performed by trained
service personnel only. Before installing or removing any components of the system, or
before carrying out any maintenance procedures, read the safety information provided in
Appendix A of the
BlackDiamond Hardware Installation Guide
.
Table 1 lists the BlackDiamond DC power supply operating ranges. DC input ranging from -42
to -72 V.
The power supplies are fully fault tolerant. They are also load-sharing, so that if one power
supply fails, the other power supply will provide sufficient power to operate a fully loaded
chassis.
The BlackDiamond chassis power supply slot is designed for standard 5" x 8" footprint power
supplies. Each power supply contains a cooling fan. Air enters from the front vent holes on the
power supply and exits from the back vent holes of the chassis, as illustrated in Figure 1. This
airflow is independent of the airflow through the modules.
Table 1:
BlackDiamond DC Power Supply Operating Ranges
Input
Output
-42 to -72 V
1971 W
