Power Failure Emergency Transfer Option - Toshiba Strata DK24 Installation And Maintenance Manual

INSTALLATION-PERIPHERALS
SECTION 400-096-208
SEPTEMBER 1992
PPSU
24/56/96
BATT
POWER SUPPLY
ACTUAL
SIZE
FIGURE 8-1
RESERVE POWER/BATTERY WIRING

2.20 Power Failure Emergency Transfer Option

2.21 The Power Failure Transfer Unit (DPFT) pro-
vides a means of automatically connecting up to
eight selected CO lines directly to designated stan-
dard telephones in the event of a power failure. The
DPFT allows normal operation of the selected CO
lines and standard telephones when the system is
in service. When power is restored, each telephone
is independently reconnected to the system after
that telephone is finished with its direct CO line call.
The DPFT is normally installed on the Main Distri-
bution Frame (MDF).
2.22 Figure 8-2 provides a circuit diagram of the
DPFT.
2.23 Power Failure Emergency Transfer Instal-
lation. Install the DPFT in accordance with the
following steps:
TWO-PRONG
MALE CONNECTOR
(PRE-ASSEMBLED)
+
WHITE
–
BLACK
IN-LINE
FUSE HOLDER
10 A
(FUSE PROVIDED)
16AWG
RING TERMINALS 3/8 IN.
BLACK
–
+
12 VDC
BATTERY
1) Mount the DPFT on or near the MDF.
NOTE:
Refer to Wiring Diagrams, Section 400-096-
209, DPFT/MDF interconnecting tables.
2) Using 25-pair cables with amphenol-type con-
nectors (female for DPFT connector J1, male
for DPFT connector J2), connect the DPFT to
two 66-type quick-connect blocks.
3) Connect the CO lines selected for emergency
use to the DPFT J1-block "CO-TIP" and "CO-
RING" terminals.
4) Connect the PCOU or PCOU2 circuits related
to the emergency CO lines to the DPFT J1-
block "PCOU-TIP" and "PCOU-RING"
terminals.
8-2
PBTC-3M
BATTERY CABLE
WITH RING TERMINALS
AND PPSU CONNECTOR
(LENGTH 9 FEET)
WHITE
+
–
12 VDC
BATTERY
BLACK JUMPER
WITH RING TERMINALS
(PROVIDED)