
Overview:
AL175UL is a power limited power supply/chargers that will convert 115VAC / 60Hz input, into two individually PTC
protected 12VDC or 24VDC output, (see specifications). They are intended for use in applications requiring UL Listing
for Access Control (UL294) and applications requiring an interface with Fire Alarm Control Panels. It must be installed
in accordance with National and Local Electrical Codes and Regulations.
Specifications:
• UL Listed for Access Control Systems (UL294).
CUL Listed - CSA Standard C22.2 No.205-M1983, Signal Equipment.
• CSFM - California State Fire Marshal Approved.
• MEA - NYC Dept. of Buildings Approved.
• NFPA 101 (Life Safety)
• Input 115VAC / 60 Hz, .6 amp.
• 12VDC or 24VDC selectable output.
• Class 2 rated power limited outputs.
• 1.75 amp continuous supply current @ 12VDC or 24VDC.
• Aux relay output (form "C" contacts).
• Filtered and electronically regulated output.
• Maximum charge current: 400mA.
• Automatic switch over to stand-by battery when AC fails.
• AC fail supervision (form "C" contacts).
• AC input and DC output LED indicators.
• Short circuit and thermal overload protection.
• Unit includes: power supply, transformer and enclosure.
Enclosure Dimensions: 8.5”H x 7.5”W x 3.5”D
Power Supply Output Specifications:
Output Switch Max. Stand-by Max. Alarm Battery
VDC Position Load DC Load DC (optional)
12VDC SW1 Open 1.75 amp 1.75 amp 12VDC
24VDC
SW1 Closed
1.75 amp 1.75 amp 24VDC
Stand-by Specifications:
Output 4 hr. of Stand-by &
5 Minutes of Alarm
12VDC / 7
AH Battery
Stand-by = 1.25 amp
24VDC / 7 AH Battery Alarm = 1.25 amp
Installation Instructions:
The AL175UL should be installed in accordance with article 760 of The National Electrical Code or NFPA 72 as well as
all applicable Local Codes.
See Terminal Identification Chart on page 3 for a description of each terminal function.
1.
Mount the AL175UL in desired location.
2.
Connect
AC power to the black and white flying leads of the transformer. Secure green wire lead to earth ground.
Use 18 AWG or lar
ger for all power connections (Battery
, AC input, DC outputs). Use 22 AWG to 18 AWG for
power limited circuits (trigger inputs, dry outputs).
Keep power limited wiring separate from non-power limited wiring (115VAC / 60Hz Input, Battery Wires).
Minimum .25” spacing must be provided.
3. Set the AL175UL to the desired DC output voltage by setting switch SW1 to the appropriate position
(power supply output specification table).
4. Measure output voltage before connecting devices. This helps avoid potential damage.
AL175UL
Access Control Power Supply/Charger
Rev. 081601
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