Altronix AL175UL Power Supply/Charger, Input 115VAC 60Hz at 0.6A, 2 PTC Outputs, 12/24VDC at 1.75A, Grey Enclosure

Both. The AL175UL is field selectable for 12VDC or 24VDC, and it supplies 1.75A at whichever one you set it to. That single setting applies to the unit, so both outputs run at the same voltage. If you have 12V strikes on one door and 24V mag locks on another, they can't share this supply, you need one board per voltage.

It comes down to current, not output count. The AL175UL gives you two individually PTC protected Class 2 outputs sharing a total of 1.75A. Add up the holding current of every device you want on it, strikes, mag locks, readers, and stay under that. Two outputs means two protected circuits, so a short on one door doesn't drop the other, but it does not mean 1.75A each.

Yes, it's a power supply/charger, so it charges a standby battery and switches over to it automatically when AC fails. The battery itself is a separate purchase, sized to the runtime you need. What ships is the enclosure, the charger, and the two PTC Class 2 outputs.

The AL175UL ships in its own grey enclosure measuring 8.5H x 7.5W x 3.5D inches, so you're mounting the cabinet itself, usually in an electrical or IT room near the doors. Input is 115VAC 60Hz at 0.6 amp, standard 120V line power, so plan a dedicated circuit or a fed junction to the can.

1.75A at 12 or 24VDC covers a small opening count, a couple of electric strikes or a single mag lock with a reader. If you're feeding a bank of mag locks or a delayed egress device, step up: the SDC 632 Series gives 2 amps with the same dual voltage selection, the Von Duprin PS902 is a 2A 12/24VDC field selectable base supply, and the SDC 634 Series is a 4 amp version. For motorized latch retraction exit devices, none of these substitute, that needs the BEST RPSMLR2 Series.

The Altronix AL175UL takes a 115VAC 60Hz input and converts it to two individually PTC protected 12VDC or 24VDC outputs at 1.75A, with automatic switch over to a stand-by battery when AC fails. The closest same-job alternates are the SDC 631 Series, a 1.5 amp regulated and filtered DC power controller with dual voltage selection, and the Securitron AQD1 switching power supply at 12/24 VDC 1 amp. The Adams Rite PS-1 is also a regulated 1 amp 12/24 volt DC supply with battery backup. All four run a dual-voltage low-voltage bus off line power; the AL175UL is the one of the group that carries two separately protected output circuits in the enclosure.

The Altronix AL175UL supplies 1.75A. Moving up the same 12/24VDC selectable path: the Securitron AQL4 is a switching supply at 12/24VDC 4/3 amp, the SDC 632 Series is a 2 amp regulated and filtered supply with dual voltage selection, the SDC 634 Series is the 4 amp version of the same, and the Von Duprin PS902 is a 2A 12/24 VDC field selectable base power supply. If the load is fixed at 12VDC, the Securitron AQS1210 is a 12 VDC 10 amp switching supply. Confirm the total holding current of every lock and reader on the run before you size it.

Three come up often. The ROFU 10305-LA is a tamper resistant power transfer hinge rated 1.5A at 42V, which carries power through the door edge but does not generate it, so it works alongside the Altronix AL175UL rather than in place of it. The Command Access CAT Field Tester is a portable 12-24VDC unit that runs off DeWalt, Makita and Milwaukee batteries and is a bench and troubleshooting tool, not a permanently installed supply. The BEST ELR150 Series is a power supply control module, meaning it manages switching and sequencing rather than being the line-voltage supply itself. The AL175UL is the line-powered supply and charger with its own enclosure.

Both are field-selectable 12/24VDC supplies for access control. The Altronix AL175UL delivers 1.75A through two individually PTC protected Class 2 outputs and includes the charger and enclosure. The Von Duprin PS902 is a 2A 12/24 VDC field selectable base power supply carrying a Grade 1 rating. For a facility standardizing on one supply, the deciding factors are usually the current the openings need and whether the exit hardware manufacturer specifies its own base supply for the devices being installed.

For a similar small supply with backup, the Adams Rite PS-1 is a 1 amp regulated supply at 12/24 volts DC with battery backup, and the Command Access PS204/204B is a linear supply at 2A, 24VDC only, with battery backup. The AL175UL sits between them on current at 1.75A and gives you the 12 or 24 volt choice the PS204 doesn't.

No added fuses. Each of the two outputs on the AL175UL is individually PTC protected, meaning a resettable thermal device limits the circuit on an overload or short and restores itself once the fault clears and it cools. No trip to site to replace a blown fuse. It also means each door circuit is isolated from the other, so a pinched wire at one strike won't take down both.

The Altronix AL175UL ships as an enclosure with charger and two PTC Class 2 outputs, which is more supply than a single strike needs. For one opening, the ROFU 9126T is a plug in mini power supply at 12 VDC 1.5A with time delay, and the Command Access PS1 Series is a 24VDC linear supply with 1 amp output. The SDC 620 Series is a 1 amp regulated and filtered low voltage supply with dual voltage selection if you still want to pick between 12 and 24 volts. The trade is that you give up the AL175UL's second independently protected output and its battery charger.

The Altronix AL175UL provides two individually PTC protected outputs. When the run needs more distributed circuits, the RCI DKPS-2A is a power supply with 8 outputs at 12/24VDC 2A for access control systems, and the Locknetics LP Series comes as a 150 and 250 amp hour power supply with enclosure. Count the openings first: two outputs covers a pair of strikes or a single mag lock plus a reader, and past that you are looking at a distribution board rather than a larger single supply.

The Altronix AL175UL is a commercial supply at 1.75A on a 120V input, selectable to 12VDC or 24VDC. If the system is 12VDC only and the draw exceeds that, the Aiphone AC-PS1250 is a 12V DC 5A UL listed supply built for AC Series access control kits, and the Securitron AQS1210 is a 12 VDC 10 amp switching supply. Choosing a kit-matched supply also keeps you inside the intercom or controller manufacturer's own listing, which matters where an inspector is reviewing the installation.

The Altronix AL175UL includes the enclosure and charger and switches over to a stand-by battery automatically when AC fails. Peers built the same way include the Command Access PS204/204B, a linear power supply with 2A at 24VDC and battery backup, and the Adams Rite PS-1, a regulated 1 amp 12/24 volt DC supply with battery backup. The Securitron BPSS is a boxed solar power supply if the location has no reliable line feed at all. Note that the AL175UL and the PS-1 give you a 12 or 24 volt choice, while the PS204/204B is 24VDC.

The Altronix AL175UL runs 1.75A selectable at 12 or 24VDC in an 8.5H x 7.5W x 3.5D enclosure. The nearest step in capacity without jumping to a large chassis is the Command Access PS210, a UL 6E/CSA linear power supply with 1.5A at 24VDC output and boost circuitry, or the SDC 632 Series at 2 amps with dual voltage selection. The Command Access unit is 24VDC with boost, so it suits a 24 volt lock run; the SDC 632 keeps the 12 or 24 volt choice the AL175UL gives you.

Yes. It's a commercial rated unit in a grey steel enclosure with Class 2 outputs, meant to be mounted in a back of house or riser location and hard fed from 120V. For a residential or single door retrofit where you don't want a wall cabinet, a plug in unit like the ROFU 9126T mini supply at 12VDC 1.5A is the simpler route.

For small openings, yes, one AL175UL per pair of protected circuits at 12 or 24VDC keeps the parts list short across a building. Where a single location has more than two circuits or higher draw, distribution matters more: the RCI DKPS-2A gives 8 outputs at 12/24VDC and 2A, which puts a whole corridor of doors on one board instead of several cabinets.