*Note: When unit is powered by a battery back up (AC Fail condition), the voltage range is 9.3V-13.2V and
19.55V-26.4V for 12 and 24 volt operation respectively.
Power Supply Output Specifications: (AL125220, AL125X220)
Output VDC
Switch Position
Max. Stand-by Load DC Max. Alarm Load DC
Battery (optional)
12VDC
SW2 - Open
1 amp
1 amp
12VDC
24VDC
SW2 - Closed
1 amp
1 amp
24VDC
Stand-by Specifications:
Output
4 hr. of Stand-by &
5 Minutes of Alarm
Output
4 hr. of Stand-by &
5 Minutes of Alarm
12VDC / 4AH Battery
0.5 amp / 1 amp
12VDC / 7AH Battery
1 amp / 1 amp
24VDC / 4AH Battery
0.5 amp / 1 amp
24VDC / 7AH Battery
1 amp / 1 amp
Installation Instructions:
The units should be installed in accordance with article 760 of The National Electrical Code and NFPA 72 as well as all
applicable Local Codes.
See Terminal Identification Chart on page 2 for a description of each terminal function.
1. Mount unit in the desired location. Mark and predrill holes in the wall to line up with the top two keyholes in the
enclosure. Install two upper fasteners and screws in the wall with the screw heads protruding. Place the enclosure’s
upper keyholes over the two upper screws; level and secure. Mark the position of the lower two holes. Remove the
enclosure. Drill the lower holes and install two fasteners. Place the enclosure’s upper keyholes over the two
upper screws. Install the two lower screws and make sure to tighten all screws (Enclosure Dimensions, pg. 4).
2. Power connections: Connect secondary (blue and yellow leads) from the transformer to the Power Supply Board
terminals marked [XFMR] (Fig. 1 - Board Installation Diagram, pg. 3). Connect 220VAC 50/60Hz to the black and
white flying leads of the transformer. Secure green wire lead to earth ground. Use 18 AWG or larger for all power
connections (Battery, AC input, DC outputs). Use 22 AWG to 18 AWG for power limited circuits (Trigger inputs,
Dry outputs, DC outputs).
3. Measure output voltage before connecting devices. This helps avoiding potential damage.
4. Set the desired DC output voltage by setting switch SW2 to the appropriate position
(Power Supply Output Specifications Table, pg. 1, Fig. 1a, pg. 3).
Input:
• 220VAC 50/60 Hz, 0.3 amp.
Output:
• Two (2) 12VDC or 24VDC outputs.
• 1 amp total supply current @ 12VDC or 24VDC.
• Filtered and electronically regulated output.
*
Battery Backup:
• Built-in charger for sealed lead acid or gel type batteries.
• Maximum charge current: 400mA.
• Automatic switch over to stand-by battery when AC fails.
Special Features:
• AC power and unit status indicator on the front panel.
• Normally Open [NO] trigger input.
Special Features
(cont’d)
:
• Supervised Fire Alarm Disconnect (Latching w/reset
or Non-Latching).
• Units
include power supply, transformer, cam lock and
enclosure
Enclosure Dimensions
(H x W x D approx.)
:
• AL125220 - 8.5” x 7.5” x 3.5”
(215.9mm x 190.5mm x 88.9mm).
Accommodates one (1) 12VDC/4AH battery.
• AL125X220 - 13.5” x 13” x 3.25”
(342.9mm x 330.2mm x 82.55mm)
Accommodates up to two (2) 12VDC/7AH batteries.
Overview:
AL125220 and AL125X220 are power supply/chargers that convert 220VAC 50/60Hz input into two individual PTC
protected 12VDC or 24VDC outputs (see specifications).
Specifications:
AL125220 • AL125X220
Access Control Power Supply/Chargers
