AL400ULB
UL Recognized Power Supply/Charger
Overview:
Altronix AL400ULB power-limited supply/charger converts a 28VAC / 100VA input into a Class 2 Rated power-limited 12VDC or
24VDC output (see specifications).
Specifications:
Agency Listings: Battery Backup:
• UL Recognized component for: • Built-in charger for sealed lead acid or gel type batteries.
UL 294* Access Control System Units. • Maximum charge current 600mA.
UL 603 Power Supplies for Use with Burglar-Alarm Systems. • Automatic switch over to stand-by battery when AC fails.
UL 1481 Fire Protective Signaling Systems. Visual Indicators:
Input: • AC input and DC output LED indicators.
• Input 28VAC / 175VA. Supervision:
Output: • AC fail supervision (form “C” contacts).
• Class 2 Rated power-limited output. • Low battery supervision (form “C” contacts).
• 12VDC or 24VDC selectable output. Additional Features:
• 4A continuous supply current @ 12VDC. • Short circuit and thermal overload protection.
• 3A continuous supply current @ 24VDC.
• Filtered and electronically regulated output. Board Dimensions (L x W x H approximate):
7.0” x 4.0” x 1.6” (177.8 mm x 101.6 mm x 40 mm).
*Access Control Performance Levels: Destructive Attack - N/A; Endurance - IV; Line Security - I; Stand-by Power - IV.
Power Supply Output Specifications:
Output Max. Stand-by Max. Alarm Stand-by (AL400ULB Board)
Switch Position Output DIP Switches
VDC Load DC Load DC Battery
SW 1, 2 ON, 4.0A 4.0A 24V/40AH
12VDC
SW 3, 4 OFF 200mA 4.0A 12V/12AH
SW 1, 2 OFF, 3.0A 3.0A 24VDC
24VDC
SW 3, 4 ON 200mA 3.0A 24V/12AH
Stand-by Specifications:
4 hr. of Stand-by and 24 hr. of Stand-by and 60 hr. of Stand-by and
Output
5 Minutes of Alarm 5 Minutes of Alarm 5 Minutes of Alarm
Stand-by = 4.0A Stand-by = 1.0A Stand-by = 300mA
12VDC / 40AH Battery
Alarm = 4.0A Alarm = 4.0A Alarm = 4.0A
Stand-by = 200mA
24VDC / 12AH Battery – Alarm = 3.0A
–
Stand-by = 3.0A Stand-by = 1.0A Stand-by = 300mA
24VDC / 40AH Battery
Alarm = 3.0A Alarm = 3.0A Alarm = 3.0A
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 (mounting hadware included).
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).
4. Connect devices to be powered to the terminals marked [+ DC –] (Fig. 1).
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 [– BAT +] (Fig. 1) as marked on the unit (battery leads included).
Use two (2) 12VDC batteries connected in series for 24VDC operation.
7. Connect supervisory trouble reporting devices to the outputs marked [LOW BAT, AC FAIL] supervisory relays marked
[NC, NO, C ] (Fig. 1). Use 22 AWG to 18 AWG for AC Fail and Low Battery reporting.
Fig. 1 + DC -- AC FAIL NC NO C NC C NO LOW BAT
DC
AC
24V - SW1, 2 OFF
SW3, 4 ON
12V - SW1, 2 ON
SW3, 4 OFF
-- BAT +
ON
1
2
3
4
AC AC
Maintenance:
Unit should be tested at least once a year for the proper operation as follows:
Output Voltage Test: Under normal load conditions the DC output voltage should be checked for proper voltage level
(Power Supply Output Specifications Table).
Battery Test: Under normal load conditions check that the battery is fully charged, check specified voltage both at the battery terminal
and at the board terminals marked [– BAT +] to ensure that there is no break in the battery connection wires.
Note: Maximum charging current under discharges is 1.25A.
Note: Expected battery life is 5 years; however, it is recommended changing batteries in 4 years or less if needed.
LED Diagnostics:
LED ON OFF
AC (Green) Normal operation No AC input
DC (Red) Normal operation No DC output
Terminal Identification:
Terminal Legend Function/Description
AC, AC Low voltage (28VAC) transformer connections.
+ DC – 12VDC @ 4A or 24VDC @ 3A continuous power-limited output.
AC Fail Indicates loss of AC power, e.g. connect to audible device or alarm panel.
NC, NO, C Relay normally energized when AC power is present. Contact rating 1A @ 30VDC.
Bat Fail Indicates low battery condition, e.g. connect to alarm panel.
NC, C, NO Relay normally energized when DC power is present. Contact rating 1A @ 30VDC.
– BAT + Stand-by battery connections. Maximum charge current 600mA.
Altronix is not responsible for any typographical errors.
140 58th Street, Brooklyn, New York 11220 USA | phone: 718-567-8181 | fax: 718-567-9056
website: www.altronix.com | e-mail: info@altronix.com | Lifetime Warranty | Made in U.S.A.
IIAL400ULB - Rev. 030619 C06S MEMBER
