Download High Density (80sa) Shelf Assembly Installation Manual

High Density (80sa) Shelf Assembly Installation Manual
Introduction
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Introduction
Figure 1-15 Support Bracket Installed on Shelf and AAD
1.5.7.1 Grounding
Each fan assembly must be connected to the frame ground on the common rack.
Connect each fan assembly to the adjacent frame steel using a 14-gauge or better
ground wire. Do not make physical connections through painted steel. Measure
resistance between the frame ground and the facility ground directly (should be 0).
1.5.7.2 Power
For power, the fan assembly connects to the fuse panel, which is typically placed at
the top in the rack assembly. Most fuse panels also provide fuse alarm LEDs for each
connection. The redundant A and B power connectors are located at the back of the
fan assembly, as shown below. The 4-fan AAD draws 0.5A of current at 36V (18W),
while the 8-fan high density fan assembly draws 1.0A of current at 36V (36W).
POWER
ALARMS
DC VOLTAGE: -36 TO -60 V
A
B
A
B
TB1
FAN ALARM
DITECH COMMUNICATIONS CORP
FAN TRAY MODEL: AAD
DC CURRENT DRAW: 0.5 AMPS
-48V -48V RTN
MADE IN U.S.A
N C N
O
C
COMPLIES WITH FCC PART 15
FOR TECHNICAL ASSISTANCE CALL
1-800-770 0117 USA
1-800-770 01170 International
Figure 1-16 Fan Assembly Connectors
Each fan assembly also has front access fuses. The required fuse is 125V/1.5A.
1.5.7.3 Warning LED
The fan assembly provides a warning LED on the front panel. A red light indicates
that the fan assembly is not operating properly. A green light indicates that the fan
assembly is operational, while no light indicates that it is not powered.
250-1853-00, Version K2
DITECH NETWORKS
www.ditechnetworks.com
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