Power Supply Output Specifications:
Output
VDC
Switch Position
Max. Stand-by
Load DC
Max. Alarm
Load DC
Stand-by Battery
12VDC
SW 1, 2 ON,
SW 3, 4 OFF
4.0 amp
200mA
4.0 amp
4.0 amp
24V/40AH
12V/12AH
24VDC
SW 1, 2 OFF,
SW 3, 4 ON
3.0 amp
200mA
3.0 amp
3.0 amp
24VDC
24V/12AH
Stand-by Specifications:
Output
4 hr. of Stand-by &
5 Minutes of Alarm
24 hr. of Stand-by &
5 Minutes of Alarm
60 hr. of Stand-by &
5 Minutes of Alarm
12VDC / 40AH Battery
Stand-by = 4.0 amp
Alarm = 4.0 amp
Stand-by = 1.0 amp
Alarm = 4.0 amp
Stand-by = 300mA
Alarm = 4.0 amp
24VDC / 12AH Battery
--------
Stand-by = 200mA
Alarm = 3.0 amp
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24VDC / 40AH Battery
Stand-by = 3.0 amp
Alarm = 3.0 amp
Stand-by = 1.0 amp
Alarm = 3.0 amp
Stand-by = 300mA
Alarm = 3.0 amp
Installation Instructions:
The AL400ULB should be installed in accordance with article 760 of The National Electrical Code or NFPA 72 as well
as all applicable Local Codes.
1. Mount AL400ULB in the desired location/enclosure.
2. Connect 28VAC / 175VA transformer to the terminals marked [AC, AC], (Fig. 1).
Use 18 AWG or larger for all power connections (Battery, DC output). Use 22 AWG to 18 AWG for the
power-limited circuits (AC Fail/Low Battery reporting).
Keep power-limited wiring separate from non power-limited wiring (115VAC / 60Hz Input, Battery Wires).
Minimum 0.25” spacing must be provided.
CAUTION: Do not touch exposed metal parts. Shut branch circuit power before installing or servicing equipment.
There are no user serviceable parts inside. Refer installation and servicing to qualified service personnel.
3. Set the AL400ULB to the desired DC output voltage by setting the switches to the appropriate positions
(Power Supply Output Specifications Table).
AL400ULB
UL Recognized Power Supply/Charger
(AL400ULB Board)
Output Dip Switches
Overview:
The AL400ULB is a power-limited supply/charger that converts a 28VAC / 100VA input into a Class 2 Rated
power-limited 12VDC or 24VDC output (see specifications).
Specifications:
Agency Listings:
• UL Recognized component for Access Control
System Units (UL 294), Standard for Power
Supplies for Use with Burglar-Alarm Systems (UL 603),
Standard for Safety for Fire Protective Signaling
Systems (UL 1481).
Input:
• Input 28VAC / 100VA.
Output:
• Class 2 Rated power-limited output.
• 12VDC or 24VDC selectable output.
• 4 amp continuous supply current @ 12VDC.
• 3 amp continuous supply current @ 24VDC.
• Filtered and electronically regulated output.
Battery Backup:
• Built-in charger for sealed lead acid or gel type batteries.
• Maximum charge current 600mA.
• Automatic switch over to stand-by battery
when AC fails.
Visual Indicators:
• AC input and DC output LED indicators.
Supervision:
• AC fail supervision (form “C” contacts).
• Low battery supervision (form “C” contacts).
Additional Features:
• Short circuit and thermal overload protection.
Board Dimensions
(W x L x H approximate)
:
4.1” x 7.1” x 1.75” (104.14mm x 180.34mm x 44.45mm)
