Fuses; Battery Back-Up Installation; Pbbu Pcb - Toshiba Strata VI Installation Instructions Manual

01.30 Fuses
01.31 Remove the spare fuses from
the hardware carton, and place them in
their individually marked holders.
01.32 Remove and inspect the fuses
that were shipped inside the MPSA.
If
either fuse is defective, replace it and
order another spare fuse from your
Toshiba supplier.
01.33 Prior to installing the PBBU,
connect the MPSA to the MKSU per
Paragraph 06.10, Section 100-006-200,
Installation.
02 BATTERY BACK-UP INSTALLAT1:0N
02.01 The power battery back-up
unit (PBBU) in Figure 8 is an optional
PCB which may be installed in the
MPSA-200 to interface with two aux-
iliary 12-VDC batteries. In the event
of an electrical power failure, the
PBBU provides an automatic battery
power source, permitting a typical
STRATA VI system to continue normal
operations for some time (in direct
ratio with the type and size of the
batteries chosen).
FIGURE B
02.02 The PBBU contains a voltage
sensing circuit which causes an elec-
tro-mechanical relay to connect the
back-up battery power to the system
-3-
SECTION 100-006-250
MPSA-200 INSTALLATION
DECEMBER 1982
before the Nl PSA output voltage drops
below 21-VDC (at which point system
functions would be disrupted and
existing calls would be disconnected).
02.03 When the normal source of
electrical power is restored, the volt-
age sensing circuit relay will disconnect
the standby battery power source.
02.04 If the standby battery power
source output falls below 21-VDC while
it is connected to the system, the volt-
age sensing circuit will cause the relay
to disconnect the standby batteries
from the system.
02.05 The standby batteries will not
be reconnected unless:
• The "Battery Override
11
switch (Fig-
ures 8 and 9) is placed in the
ON
position, or ...
• The depleted batteries are re-
placed by a freshly charged pair
and the
11
Battery Override
11
switch
is turned on and then released.
02.06 The PBBU also contains cir-
cuitry to provide the charge current
necessary to maintain the batteries at
a satisfactory level of charge while the
STRATA VI system is in normal oper-
ation. An external fast charger may
also be connected across the ba tterv
output terminal connections. -
02.07
The Pl3BU kit contains the
following items:
• PBBU-powcr battery backup PCB.
• Fuse-spare battery protection fuse.
•
11
PBBU-4 REV
11
-decal to be placed
on the front of the M PSA.
e
11
W ARNING
11
-warning tag for at-
tachment to the 115-V AC power
cord.
-·