SECTION 5 1 8-450- 1 00
FUSE PANEL
19C-TYPE
POWER UNIT
Fig. 1 -570A KSU (Cover Removed)
•
Has designation strip holder and tab assembly
serving as a retainer to lock KTUs in the
connectors.
•
Mounts twelve 4-inch and three 8-inch KTUs.
•
Has 424C, 455A, 456B, and 460B KTUs
shipped with KSU.
•
Is 25-1/2 inches wide, 17 inches high, 11
inches deep, and requires 9-1/2 inches of
wall space on either side of the backboard
to permit full opening of the carrier
assemblies.
•
Is arranged for wall mounting or may be
floor-mounted (using the 77B apparatus
mounting).
•
Has a removable fiberglass cover.
2.04
All wiring connections are made on connecting
blocks located in the KSU (Fig. 2). Since
all stations pick up all lines on the same button
at each telephone set, all equipment connections
are factory-wired to the connecting blocks.
Page 4
All
sta tion connections are made on
the sta tion connection field blocks
using standard color-code cutdown.
This
eliminates the need for an external
cross-connection field except when
using satellite wiring plan.
2.05
The block and column on which a station is
cut down determines the intercom code
assigned to that station. Intercom codes available
are codes 0 and 3 through 19.
(a) Connecting block 1 (Fig. 3) contains the
diode arrangement for preset conference
and common audible signaliq.g. Terminals are
provided for strapping the power failure transfer,
CO ringing, preset conference, paging, and ring
transfer.
(b) Connecting block 2 (Fig. 4) contains the
polarity guard diodes for the CO/PBX lines.
(c) Connecting block 3 (Fig. 5) provides terminals
for connecting station code 0 (attendant
station), station code 3, the incoming CO/PBX
