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CAUTION - RISK OF EXPLOSION
IF BATTERIES ARE REPLACED WITH AN
INCORRECT TYPE.
Installing the Kit PSU7A Assembly (Continued)
PSU7A Specifications
The PSU may be mounted in the ID3000 Series Back Box or mounted in an external battery box.
When the PSU7A is mounted in an external battery box there are three charging configurations set
by links on the PSU7A (refer to previous page for details).
The power supply provides dual redundancy of fusing and power connections to the main panel.
The table below compares the key specifications:
PSU and Battery Enclosure
Description
Deep back box
External battery box
External battery box
2 external battery boxes
1
1
Charged to 80% within 24 hours.
2
2
Currents in this table refer to the maximum current available at the output of the DTP/Booster.
3
3
Refer to instruction sheet 997-270-000-X for the sizes and battery capacity of other enclosures.
PSU7A Ratings
Input Rating:
Voltage, frequency:
Maximum current consumption: 5A (Protection by 5A mains supply fuse in terminal block)
PSU Output Ratings:
Output voltage:
Ripple voltage:
EN54 PSU Loadings
EN54 Battery Wiring:
DTP / Booster Output Ratings:
Output voltage:
Battery Charger Output Ratings:
The ratings below are common to all PSU7A Options. Refer to the table above for details of
maximum battery capacity and charging current.
Battery voltage when charged:
Temperature compensation:
Battery fuse rating:
Final battery voltage:
Charger ripple voltage:
Low Voltage Shut Down
If the battery output drops below the final battery voltage, then the batteries are disconnected to
avoid system malfunction and deep discharge causing permanent damage. Battery capacity
should be selected to ensure sufficient backup power in the event of mains power failure.
Battery Capacity
Sealed valve regulated lead-acid battery types MUST be used. Battery lifetime depends on the
ambient temperature. Refer to the battery manufacturer's technical specification for guidance.
When using multiple batteries, all batteries should be from the same Manufacturer, of the same
type and date code and be mounted in the same cabinet. If batteries are to be installed external to
the panel, then ALL batteries must be installed externally.
Two 12V batteries must be connected in series. The maximum capacity depends on the cabinet
size and the battery manufacturer. To achieve a 130Ah rating, four 65Ah, 12V batteries may be
connected in a series/parallel arrangement. Refer to instruction sheet 997-270 for details.
Battery
Part Number
Capacity
020-474-XXX or
42Ah
020-475-XXX
020-541-XXX
42Ah
020-541-XXX
78Ah
020-541-XXX (x 2)
130Ah
230Vac, ±15%, 50 / 60Hz
28.1Vdc - 27.7Vdc when primary power (230Vac) present.
28.1Vdc - 19.5Vdc when on standby power (batteries).
± 200mV
Imax(a): 1.5A; Imax(b): 10A; I(min): 0A
Ri(max) [Test Impedance]: 0.3ohm
26.0V - 28.3Vdc @ 6.3A load (Input Voltage 19.5V to 28.5V)
27.3V at 20° C (Charge float voltage)
-3mV/ °C/ cell
10A. 250V HRC (T)
21V
±20mV
7
Charge
Alarm
1
1
Current
Current
3
3
2.5A
4.5A
2.5A
6.3A
4.5A
6.3A
7.3A
6.3A
997-277-000-9, Issue 9 February 2010
Quiescent
2
2
Current
2.5A
4.0A
3.0A
1.5A
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