Aiphone PS-1820UL/2420UL - DC Power Supply, 2A UL Listed

Output voltage is the only difference in the pair. The PS-1820UL puts out 18V DC and the PS-2420UL puts out 24V DC. Both are 2A DC supplies running from a 110V AC input, both draw 85-105VA, and both share the same 6-9/16 x 3-9/16 x 2 inch housing. Pick the one that matches the DC input your Aiphone intercom station or door station calls for, because the supply is fixed voltage, not field selectable.

No. Each model is a single fixed output: 18V DC on the PS-1820UL, 24V DC on the PS-2420UL, and voltage is the option you choose at order time rather than a jumper you set in the field. If you need one supply that can be set either way on the job, look at a dual-voltage unit like the SDC 632 Series 2 Amp regulated and filtered supply with dual voltage selection, or the Von Duprin PS902 base power supply, 2A field selectable 12/24 VDC. Both are also 2A, so you keep the same current capacity.

Rated operating range is 32 to 104 degrees F (0 to 40 degrees C), so it needs to stay above freezing. An unheated garage or an exterior vestibule that drops below 32F in winter is outside the rating; put the supply inside the conditioned space and run the low-voltage DC out to the door station instead. Upper end is 104F, which also rules out a closed attic or an unventilated rooftop cabinet in summer.

Match the DC voltage the existing station requires, then order the same voltage here: PS-1820UL for 18V DC, PS-2420UL for 24V DC. Both give 2A, run on 110V AC, and are the same physical size, so a straight swap in the closet is a matter of the DC voltage and nothing else. Read the label on the unit coming out before you order, since 18V and 24V units look identical on the shelf.

The Aiphone PS-1820UL/2420UL is an AC adapter with 110 V AC input and constant DC output; nothing in its build carries standby batteries. When the opening has to hold up through a power loss, the Command Access PS204/204B is a linear supply with 2A at 24VDC and battery backup, the Adams Rite PS-1 is a regulated 1 amp 12/24 volt DC supply with battery backup, and the Detex 10-800 Series universal logic controller pairs a 120VAC/24VDC supply with battery backup. The Securitron BPSS is a boxed solar power supply for locations without reliable line power.

No. The Aiphone PS-2420UL is a 2A DC supply built to run intercom equipment. Exit device electrification calls for a supply built for that inrush and logic: the BEST RPSMLR2 Series is a power supply for motorized latch retraction exit devices, the BEST PS161-6 is a power supply for delayed egress exit devices with 120V input, 12/24V output and 6A capacity, and the BEST ELR150 Series is a power supply control module for electronic access control. The Command Access PS210 is a UL 6E/CSA linear supply with 1.5A at 24VDC and boost circuitry for loads that need extra current on pull-in.

The Aiphone PS-2420UL delivers 24V DC at 2A output. Two peers land on the same output rating: the Command Access PS204/204B is a linear power supply with 2A at 24VDC and battery backup, and the SDC 632 Series is a 2 amp regulated and filtered low voltage power supply with dual voltage selection. The Von Duprin PS902 base power supply is also 2A, field selectable between 12 and 24 VDC. The Aiphone unit is a fixed-voltage AC adapter sized at 6-9/16 inch H x 3-9/16 inch W x 2 inch D, so the peers with enclosures and battery backup are physically larger installs.

The Aiphone units are ordered per voltage: the PS-1820UL puts out 18V DC and the PS-2420UL puts out 24V DC, each a separate part. If the job calls for one part number that covers 12 and 24 volts, the Von Duprin PS902 is 2A at 12/24 VDC field selectable, the SDC 632 Series is a 2 amp supply with dual voltage selection, and the RCI DKPS-2A runs 12/24VDC at 2A with 8 outputs. All three hold the same 2A capacity while letting the installer pick the voltage at the enclosure.

The Aiphone PS-1820UL/2420UL is a 2A adapter feeding a single device. For a multi-device access control run, the Altronix AL1024ULACMCB is a power supply and access power controller with 8 PTC outputs at 24VDC at 10A from a 115VAC 60Hz 4.2A input in a grey enclosure, the RCI DKPS-2A offers 8 outputs at 12/24VDC and 2A, and the SDC 634 Series is a 4 amp regulated and filtered supply with dual voltage selection. The Securitron AQL4 is a 12/24VDC switching supply at 4/3 amps, and the Securitron AQS1210 runs 12 VDC at 10 amps for larger 12 volt loads.

The PS-1820UL and PS-2420UL each deliver 2A of DC output, so the honest way to size it is to add up the current draw of every station you intend to hang on it and stay under 2A total. It is a single-output supply feeding a system, not a multi-output distribution board. If you are powering a bank of doors and want separately fused outputs, an access power controller such as the RCI DKPS-2A with 8 outputs at 12/24VDC 2A, or the Altronix AL1024ULACMCB with 8 PTC outputs at 24VDC 10A, is the type built for that.

It runs on 110V AC input, standard building power, and consumes 85-105VA. That is well under an amp on a 120V branch circuit, so it shares a general-purpose receptacle in an IT or telecom closet without a dedicated circuit. There is no 220V version in the line.

It is classified commercial, and it is UL Listed at 2A DC output. That matters on a spec job in a multi-family lobby, a school, or a healthcare entry where the AHJ wants listed power feeding the intercom. Facilities standardizing across many entries can run the same part at every door, choosing 18V DC or 24V DC to match the station.

The Aiphone PS-1820UL is rated 2A output. Where the load is lighter, 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, and the Securitron AQD1 is a switching supply at 12/24 VDC, 1 amp. The ROFU 9126T is a plug-in mini supply at 12 VDC, 1.5A with a time delay. Note that none of those peers produce 18V DC, so if the device specifically calls for 18 volts the PS-1820UL is the part that matches.

No, despite both showing up in access control power searches. The ROFU 10305-LA/10306-LA is a tamper resistant power transfer hinge rated 1.5A at 42V in a plastic white finish - it carries power across the door edge, it does not generate it. The Aiphone PS-1820UL/2420UL is the DC power supply itself, 18V DC or 24V DC at 2A. A ROFU supply that does compare is the 9102-12D UL/9102-24D, which takes 10/120VAC 60Hz input. On many jobs the hinge and the supply are both required, not one instead of the other.

The Aiphone PS-1820UL/2420UL is a compact commercial unit at 6-9/16 inch H x 3-9/16 inch W x 2 inch D, sized to sit near the intercom equipment it feeds. For enclosure-mounted head-end power, the Altronix AL1024ULACMCB comes in a grey enclosure with 8 PTC outputs at 24VDC and 10A, the Locknetics LP Series is offered with an enclosure, and the SDC 631 Series is a 1.5 amp regulated and filtered DC power controller with dual voltage selection. Facilities often run both: enclosure supplies at the access control panels and dedicated Aiphone supplies at the intercom stations.

They serve different moments on the job. The Command Access CAT Field Tester is a 12-24VDC portable power supply that runs off DeWalt, Makita and Milwaukee batteries, meant for bench and field checks of a device. The Aiphone PS-2420UL is a permanently installed AC adapter taking 110 V AC input and delivering constant 24V DC at 2A for the finished installation. A technician verifying a door before final wiring uses the tester; the installation itself needs the fixed supply.