PSU and Battery Enclosure
Battery
Charge
Alarm
Quiescent
1
2
2
Description
Part Number
Capacity
Current
Current
Current
3
Deep back box
020-474-XXX or
42Ah
2.5A
4.5A
2.5A
020-475-XXX
External battery box
020-541-XXX
42Ah
2.5A
6.3A
4.0A
External battery box
020-541-XXX
78Ah
4.5A
6.3A
3.0A
2 external battery boxes
020-541-XXX (x 2)
130Ah
7.3A
6.3A
1.5A
1
3
Input Rating:
Voltage, frequency:
230Vac, ±15%, 50 / 60Hz
Maximum current consumption:
5A (Protection by 5A mains supply fuse in terminal block)
PSU Output Ratings:
Output voltage:
28.1Vdc - 27.7Vdc when primary power (230Vac) present.
28.1Vdc - 19.5Vdc when on standby power (batteries).
Ripple voltage:
± 200mV
EN54 PSU Loadings
Imax(a): 1.5A; Imax(b): 10A; I(min): 0A
EN54 Battery Wiring:
Ri(max) [Test Impedance]: 0.3ohm
DTP / Booster Output Ratings:
Output voltage:
26.0V - 28.3Vdc @ 6.3A load (Input Voltage 19.5V to 28.5V)
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:
27.3V at 20° C (Charge float voltage)
Temperature compensation:
-3mV/ °C/ cell
Battery fuse rating:
10A. 250V HRC (T)
Final battery voltage:
21V
Charger ripple voltage:
±20mV
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:
PSU7A Specifications
1
Charged to 80% within 24 hours.
2
Currents in this table refer to the maximum current available at the output of the DTP/Booster.
3
Refer to instruction sheet 997-270-000-X for the sizes and battery capacity of other enclosures.
1
2
3
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.
PSU7A Ratings
7
Installing the Kit PSU7A Assembly (Continued)
997-277-000-9, Issue 9 February 2010
!!
CAUTION - RISK OF EXPLOSION
IF BATTERIES ARE REPLACED WITH AN
INCORRECT TYPE.
