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Overview:

AL175ULB is a power-limited power supply/charger that converts a 28VAC input into two (2) individual PTC protected 
12VDC or 24VDC outputs (see specifications). They are intended for use in applications requiring UL Listing for Access 
Control (UL 294) and applications requiring an interface with Fire Alarm Control Panels.

Specifications:

Power Supply Output Specifications:

Output VDC

Switch Position

Max. Stand-by Load DC

Max. Alarm Load DC

Battery (optional)

12VDC

SW1 OFF

1.75A

1.75A

12VDC

24VDC

SW1 ON

1.75A

1.75A

24VDC

Stand-by Specifications:

Output

4 hr. of Stand-by & 5 Minutes of Alarm

12VDC / 7AH Battery

Stand-by = 1.25A

Alarm = 1.25A

24VDC / 7AH Battery

Installation Instructions:

The AL175ULB 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 AL175ULB in the desired location/enclosure.

2.  Connect 28VAC, 56VA transformer to the terminals marked [AC, AC].

 

Use 18 AWG or larger for all power connections (Battery, DC output).

 

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 0.25” spacing must be provided.

3.  Set the AL175ULB to the desired DC output voltage by setting switch SW1 to the appropriate position 

 (see Power Supply Output Specification Chart, pg. 1).

4.  Measure output voltage before connecting devices. This helps avoiding potential damage.

5.  Connect battery to the terminals marked [+ BAT -] 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. 

6.  Connect appropriate signaling notification devices to AC Fail supervisory relay outputs. 

 

Note: To meet UL requirements, AC Supervisory outputs must be connected to the zone of Alarm Control Panel 

 

or to visual AC trouble indicator. 

7.  For Access Control Device & Fire Alarm Interface connections see Application Diagrams, pg. 4 

 and 

Terminal Identification Chart, pg. 3

Agency Listings:

•  UL Recognized component for
  Access Control Systems (UL 294).

Input:

• Input 28VAC, 56VA.
•  Fire Alarm Panel or Access Control trigger input.

Output:

•  12VDC or 24VDC selectable outputs.
•  1.75A supply current.
•  Two (2) Class 2 Rated power-limited outputs.
  - Fail-Safe/Fail-Secure lock output (switched).
  - Auxiliary power output (unswitched).
•  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” contacts). 
•  Supervised Fire Alarm Disconnect 
  (Latching w/reset or Non-Latching).

Visual Indicators:

•  AC input and DC output LED indicators.

Board Dimensions 

(W x L x H approximate)

3.1” x 5.8” x 1.5” (78.74mm x 147.32mm x 38.1mm).

AL175ULB

Access Control Power Supply/Charger

Содержание AL175ULB

Страница 1: ...necting devices This helps avoiding potential damage 5 Connect battery to the terminals marked BAT 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 b...

Страница 2: ...itions 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 SW1 VR1 BAT AC AC LOCK STRIKE ...

Страница 3: ...rted together and are typically used to power Mag Locks STRIKE This terminal provides DC output voltage when TRG1 and TRG2 are unshorted and are typically used to power Electric Strikes N C N O C Isolated dry Form C contacts Shorting TRG1 and TRG2 together causes these contacts to switch They are typically used for controlling multiple AL175ULBs with fire alarm tie in Fig 4 and Fig 5 pg 4 AUX Cont...

Страница 4: ...e alarm tie in with manual reset Fig 3 Typical dual mag lock installation with fire alarm tie in using trigger controlled outputs Fig 6 Multiple AL175UL X power supply connections Altronix is not responsible for any typographical errors 140 58th Street Brooklyn New York 11220 USA 718 567 8181 fax 718 567 9056 website www altronix com e mail info altronix com Lifetime Warranty Made in U S A IIAL175...

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