ADTRAN MX3216, Системное руководство

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Section 4, Installation - Installing the MX3 Chassis
61189008L1-1B 4-5
NOTE
A readily accessible disconnect device, such as a rackmount fuse
and alarm panel that is suitably approved and rated, should be
incorporated into the fixed wiring.
Connect to a reliably grounded –48 VDC or ±24 VDC source which
is electrically isolated from the AC source.
The branch circuit overcurrent protection should be a fuse or
circuit breaker rated –48 VDC, 1.5 amp slow-blow or ±24 VDC, 3
amp slow-blow.
a. Determine which fuse pairs are to supply power to the chassis.
b. Remove the fuses from the A and B slots for the pair.
c. Connect the ends of one wire between the “A” CO VDC supply and the
PWR A
terminal
on the MX3 rear panel (see Figure 4-4 ).
Figure 4-4. Power Connector
d. Connect the three remaining wires in the same manner. Connect the “A” CO VDC
return with
RET A
; “B” CO VDC supply with
PWR B
; and “B” CO VDC return with
RET B
.
4. Apply power and check voltages.
WARNING
Installing fuses in the fuse and alarm panel at this stage provides
power to the chassis. There is power to pins and connectors on the
rear panel and inside the chassis. Exercise caution to avoid
electrical shock.