3-46
Issue 5
May 1997
363-208-010
Cabling, Wiring, and Assembly
External DC Power and Ringing
Supply Connections
General
NOTE
:
External DC power and ringing connections from the customer’s supplies
must be made to the
SLC-2000 RT Bay Power Interface Unit (ED7C723-
30). Power and ringing are not provided within the RT Bay.
NOTE
:
Each power input (separate A and B feeders) lead and its associated
return must not exceed the maximum wire size of 10 gauge at the PIU.
Each -48 volt feeder should be protected with a 30 amp circuit breaker.
NOTE
:
An external ringing supply such as the J1C182BC Ringing Supply Shelf
must be provided for connections to the RT Bay. Both positive and negative
20 Hz ringing current generators should be equipped. The interconnecting
cable should be a twisted triple (20-24 gauge) for each of the two ringing
generators furnished. When interconnecting with the J1C182BC shelf the
ED7C723-35 Group 9 Cable Assembly should be utilized.
NOTE
:
The Power Interface Unit employs screw down terminals for connecting the
ancillary cables. Do not attempt to connect wires larger than the capacity
(10 gauge) of these terminals. Remove the unit’s side panel for easier
access.
NOTE
:
Ensure that no
SLC-2000 circuit packs are in place.
Содержание SLC-2000 Access System Central Office Terminal
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