
Power Supply Voltage Output Selections:
Output Switch Position
12VDC SW1 - CLOSED (Fig. 1, on right)
24VDC SW1 - OPEN (Fig. 1, on right)
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 = 2.5 amp
Alarm = 2.5 amp
Stand-by = 1.0 amp
Alarm = 2.5 amp
Stand-by = 300mA
Alarm = 2.5 amp
24VDC / 12AH Battery --------
Stand-by = 200mA
Alarm = 2.5 amp
--------
24VDC / 40AH Battery
Stand-by = 2.5 amp
Alarm = 2.5 amp
Stand-by = 1.0 amp
Alarm = 2.5 amp
Stand-by = 300mA
Alarm = 2.5 amp
Installation Instructions:
The AL300ULXB2 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 the AL300ULXB2 in the desired location/enclosure.
2. Set the AL300ULXB2 to the desired DC output voltage by setting SW1 (Fig. 2, pg. 2) to the appropriate position
(refer to Power Supply Voltage Output Selections chart).
3. Connect AC power (115VAC / 60Hz) to the terminals marked [L, G, N] (Fig. 2, pg. 2). Use 18 AWG or larger for all
power connections (Battery, DC output, AC input). Use 22 AWG to 18 AWG for 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.
4. Connect devices to be powered to the terminals marked [+ DC –] (Fig. 2, pg. 2).
5. Measure output voltage before connecting devices. This helps avoiding potential damage.
6. For Access Control applications batteries are optional. When batteries are not used, a loss of AC will result in the
loss of output voltage. When the use of stand-by batteries is desired, they must be lead acid or gel type.
Connect battery to the terminals marked [+ BAT –] (Fig. 2, pg. 2). Use two (2) 12VDC batteries connected in series
for 24VDC operation (battery leads included).
AL300ULXB2
UL Recognized Power Supply/Charger
Agency Listings:
• ULRecognizedcomponentfor:AccessControl
System Units (UL 294), Power Supplies for use with
Burglar-Alarm Systems (UL 603), Hospital Signaling
and Nurse Call Equipment (UL 1069), Power Supplies
for Fire Protective Signaling Systems (UL 1481).
Input Rating:
• Input115VAC60Hz,3.5amp.
Output Rating:
• Class2Ratedpower-limitedoutput.
• 12VDCor24VDCselectableoutput.
• 12VDCor24VDC@2.5ampcontinuous
supply current.
• Filteredandelectronicallyregulatedoutput.
Battery Backup:
• Built-inchargerforsealedleadacidorgeltypebatteries.
• Maximumchargecurrent0.7amp.
• Automaticswitchovertostand-bybatterywhenACfails.
• Zerovoltagedropwhenswitchedovertobatterybackup.
Visual Indicators:
• ACinput,DCoutputandBatteryLEDindicators.
Supervision:
• ACfailsupervision(form“C”contacts).
• Lowbatteryandbatterypresencesupervision
(form“C”contacts).
Additional Features:
• Shortcircuitandthermaloverloadprotection.
Board Dimensions (W x L x H approximate):
4.5”x7.1”x1.44”(114.3mmx180.34mmx36.57mm)
OPEN SWITCH
CLOSED SWITCH
Switch Detail
+ DC ---
NC C NO NC C NO
+
BAT ---
AC DC Bat
Risk of Fire,
Replace Fuses
As Marked
Opened - 24V
Closed - 12V
AC FailBat Fail
J1
SW1
5A 250V
15A 250V
AC Delay
15
L G N
Fig. 1
Overview:
The AL300ULXB2 is a power supply/charger that converts a 115VAC 60Hz input into a Class2Ratedpower-limited
12VDC or 24VDC output (see specifications).
Specifications:
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