Power Supply - Toshiba Strata DK14 General Description Manual

Only one TSIU can be installed per DK40i system. When the TSIU PCB is installed, the PIOU can
still be installed for zone paging, control relays, and an SMDR RS-232 interface, built-in (IMDU)
maintenance modem, or an SMDI or maintenance interface.

Power Supply

The power supply generates +5VDC and -24VDC for the entire system, even in its expanded
configuration. (See
Table 5 Summary of Electrical/Environmental Characteristics
DK40i Primary Power
Input AC
AC frequency
Power
AC input current
Environmental Specifications
Operating temperature
Operating humidity
Storage temperature
Power Supply
DC voltage output specification
Battery Charger Characteristics
KSTU2
Ring voltage
Ringing capability
RSTU2 or RDSU
Ring voltage
Ringing capability
RSTU2 (only) Message Waiting voltage
RSTU2 or RDSU modem interface data rate
The power supply provides a built-in charger for the batteries (see
supplied 12-volt batteries can be connected to the power supply to maintain fully functioning
operation during a power failure.
Strata DK General Description
Table 5 for a summary of electrical/environmental characteristics.)
±
115VAC
50/60 Hz
75 watts maximum
1.8A maximum
32~104° F (0 ~40° C)
20~80% relative humidity without condensation
-4~158° F (-20~70° C)
-24VDC (-25.94~-28.66VDC)
+5VDC (+4.5~+5.5VDC)
-5VDC (-4.5~-5.5VDC) - Expansion KSU only
Charger: current limiting
Nominal float voltage: 2.275 volts/cell
Charge current: 0.7 amps maximum
Battery discharge cut-off voltage: 20.5
Square wave output with high/low option jumper:
Low position 130
High position, 190
2 ringers maximum per circuit, high or low position
80V RMS sine wave
one ringer per circuit, with or without Message Waiting
-90 VDC/one telephone per circuit (max.)
14,400 bps maximum
5/99
10VAC
±
20VDC peak-to-peak (no-load)
±
25VDC peak-to-peak (no-load)
Table
Strata DK40i
Base KSU Architecture
±
0.5VDC
6). Two customer-
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