Toshiba Strata DK 24, Installation And Maintenance Manual

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2-5
INSTALLATION-SYSTEM DESCRIPTION
SECTION 400-096-202
SEPTEMBER 1992
4.01 The power supplies generate
±
5VDC and -
24VDC output voltages (that are protected by
mechanical circuit breakers located on the power
supply front panel). Input voltage is provided by a
standard 117VAC, 15 amp circuit. Electrical char-
acteristics include:
•
Primary Power
§
Input AC: 85VAC ~ 135VAC
§
AC Frequency: 50/60 Hz
§
Wattage: DK24/65, DK56/140,
DK96/230
•
DC Voltage Output Specifications
§
-24VDC; -26.3 ~ -27.8
§
+5VDC; +4.5 ~ +5.5
§
-5VDC; -4.5 ~ -5.5
•
Circuit Breakers
§
24; -24V
§
56; -24V
§
96; -24V, +5V
4.10 Reserve Power
4.11 Two customer-supplied, 12-volt batteries (80
ampere hours maximum) can be connected in
series to the STRATA DK system as a power
failure backup. In the event of a power failure, the
system automatically switches over to battery power
without any interruption to existing calls or other
normal system functions. The length of time re-
serve power operates depends on the system
size, number of batteries provided, and the system
load. Typical reserve power duration estimates
are provided in Table 2-A.
FIGURE 2-5
DK24 POWER SUPPLY FRONT PANEL
+
_
BATT
LG
FG
D
D
ON
OFF
POWER
FG
-24V1 -24V2
SG
FG
PPSU 24
POWER
-5V
+5V
-24V
OUT
CIRCUIT
BREAKERS
POWER
SWITCH
AC
POWER
CORD
BATTERY
CONNECTOR
VOLTAGE
LEDs
D D
PPSU56
-24V
1
-24V
2
-24V
3
DC OUT
POWER+5V -5V
BATT
+
_
SG FG
LG FG
ON
OFF
AC IN
VOLTAGE LEDs
POWER SWITCH
AC INPUT
BATTERY
CONNECTOR
CIRCUIT
BREAKERS
FIGURE 2-6
DK56 POWER SUPPLY FRONT PANEL
-24V4
-24V1
-24V3
ON
OFF
AC IN
POWER
-5V
+5V1
+5V2
DC OUT
-24V5
-24V2
+5V1
+5V2
PPSU96
+
_
BATT
SG
FG
LG
FG
VOLTAGE
LEDs
BATTERY
CONNECTOR
POWER
SWITCH
AC INPUT
RECEPTACLE
D
D
CIRCUIT
BREAKERS
FIGURE 2-7
DK96 POWER SUPPLY FRONT PANEL