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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Install and Connect Cabinets
Page 1-21Connect DC Power and Ground
1
7. Connect DC Power to PPN and EPN Cabinets
1. Be sure the main circuit breaker is OFF.
2. Measure and cut a piece of 6 AWG (#40) (16 mm
2
) wire long enough to
reach from the DC Power Cabinet to the PPN cabinet.
3. At the DC Power Cabinet, connect the -48 volt DC wire to the DC OUTPUT
circuit breaker. See Figure 1-7
. Connect the -48 volt RTN (return) wire to
the ground discharge bar.
4. Route the wires out of the cabinet, through the hole in the lower rear cover,
and to the PPN cabinet.
5. Connect the -48 volt DC wire to the -48VDC terminal on the J58890CF
Power Distribution Unit.
6. Connect the -48 volt RTN wire to the -48RTN terminal on the J58890CF
Power Distribution Unit terminal block.
7. Repeat Steps 2 through 6 for each EPN and Auxiliary cabinet in the
system.
8. Connect DC Battery Cabinet to DC Power
Cabinet
!
CAUTION:
When using battery backup, each cabinet in the system must have a
dedicated battery backup. The battery backup power cannot be shared
between cabinets.
1. Set the main circuit breaker on the DC Battery Cabinet and the DC Power
Cabinet to OFF.
2. Measure and cut a 6 AWG (#40) (16 mm
2
) wire long enough to reach from
the DC Battery Cabinet’s -48 Volt DC terminal to a DC OUTPUT circuit
breaker on the DC Power Cabinet.
3. At the DC Battery Cabinet, connect the -48 volt DC wire to the -48 VDC
connector. Connect the -48 volt RTN wire to the ground connection
terminal.
4. Route the wires out of the cabinet through the hole in the lower rear cover
and to the DC Power Cabinet.
5. At the DC Power Cabinet, terminate the -48 volt DC wire on a DC OUTPUT
circuit breaker. Terminate the -48 volt RTN (return) wire on the ground
discharge bar.