Altronix AL176ULB Access Control Power Supply Charger Instruction Manual
- June 4, 2024
- Altronix
Table of Contents
Altronix AL176ULB Access Control Power Supply Charger
Overview:
AL176ULB is a power-limited power supply/charger that converts a 24VAC input into 12VDC or 24VDC output (see specifications). It is intended for use in applications requiring UL Recognition for Access Control (UL294).
Specifications:
Agency Listings:
- UL Recognized component for US and Canada.
Input:
- 28VAC, 56VA from UL Listed, Class 2 transformer.
Output:
- 12VDC or 24VDC selectable output.
- 1.75A supply current.
- Class 2 Rated power-limited auto-resettable output.
- PTC protected outputs, rated @ 2.5A.
- Filtered and electronically regulated output.
- Short circuit and thermal overload protection.
Battery Backup:
- Built-in charger for sealed lead acid or gel type batteries.
- Automatic switch over to stand-by battery when AC fails.
- Maximum charge current 0.4A.
Supervision:
- AC fail supervision (form “C” 1A @ 28VDC).
- Low battery supervision (form “C” 1A @ 28VDC).
Visual Indicators:
- AC input and DC output LED indicators. Board Dimensions
- (W x L x D approx.): 3.1” x 5.3” x 1.4” (78.7mm x 134.6mm x 35.6mm).
Power Supply Output Specifications:
Output VDC| Jumper| Max. Stand-by Load DC| Max. Alarm Load DC| Battery
(optional)
---|---|---|---|---
12VDC| Jumper Removed| 1.75A| 1.75A| 12VDC
24VDC| Jumper On| 1.75A| 1.75A| 24VDC
Stand-by Specifications:
| Output | 4 hr. of Stand-by and 5 Minutes of Alarm |
|---|---|
| 12VDC / 7 AH Battery | Stand-by = 1.25A Alarm = 1.25A |
24VDC / 7 AH Battery
Installation Instructions:
AL176ULB 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 2 for a description of each terminal
function.
-
Mount the AL176ULB in the desired location/enclosure (mounting hardware included).
-
Connect 24VAC/40VA transformer to the terminals marked [ XFMR INPUT ].
Use 18 AWG or larger for all power connections (Battery, AC input). Use 22 AWG to 18 AWG for power- limited circuits (DC output, AC FAIL and LOW BAT supervisory relays).
Keep power-limited wiring separate from non power-limited wiring (115VAC / 60Hz Input, Battery Wires). Minimum 0.25” spacing must be provided. -
Set the AL176ULB to the desired DC output voltage by either removing/leaving jumper.
(see Power Supply Output Specifications). -
Connect battery to the terminals [+ BAT – ] as marked on the unit (battery leads included). Use two (2) 12VDC batteries connected in series for 24VDC operation.
Note: 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. -
Measure output voltage before connecting devices. This helps avoiding potential damage.
-
Connect devices to be powered to the terminals marked [ + DC OUT – ] (Fig. 1).
-
Connect appropriate signaling notification devices to AC Fail and Low Bat supervisory relay outputs. Note: To meet UL requirements, AC Supervisory outputs must be connected to the zone of Alarm Control Panel or to a visual AC trouble indicator.
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 Chart).
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 discharge is 400mA.
Note: Expected battery life is 5 years; however, it is recommended changing batteries in 4 years or less if needed.
LED Diagnostics:
| Red (DC) | Green (AC) | Power Supply Status |
|---|---|---|
| ON | ON | Normal function. |
| ON | OFF | Loss of AC. Battery backup is powering output. |
| OFF | ON | No DC output |
| OFF | OFF | Loss of AC. Discharged or missing stand-by battery. No DC output. |
Terminal Identification:
| Terminal Legend | Function/Description |
|---|---|
| XFMR INPUT | Low voltage AC input (24VAC/40VA) . |
| + DC OUT — | Continuous positive (+) DC power output voltage. Common negative |
(-) output (ground).
+ BAT —| Stand-by battery connections.
AC FAIL N.O., C, N.C| Used to notify loss of AC, e.g. connect audible device
or alarm panel.
Relay is normally energized when AC power is present. Contact rating 1A @ 28VDC.
LOW BAT N.O., C, N.C.| Used to notify low battery condition, e.g. connect audible device or alarm panel. Relay is normally energized. Contact rating 1A @ 28VDC.
ronix 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
IIAL176ULB Rev. 081701
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