Aiphone AC-2DM-B PoE Two-Door Access Controller

One AC-2DM handles two doors. It mounts above or near the first door and controls that opening directly, plus a second door up to 500 feet away. Two Wiegand reader inputs and two solid state dry contact relays are on board, so both openings get their own reader and relay from the single module.

PoE does the whole job. The unit is powered over IEEE 802.3af PoE and supplies integrated lock power at 12V DC, 500mA, plus 12V DC, 300mA of option power for peripherals. Add up your lock current draw first, a pair of hungry maglocks can exceed 500mA and would need their own supply. Relay contact rating is 24V DC, 1A if you are switching an external power path instead.

Reader inputs are Wiegand, so any Wiegand output reader wires straight in. There are two of them, one per door. Proprietary or OSDP-only readers are not what this module accepts.

Yes, UL and ULC Listed under UL 294 and ULC S319-05. It is also NDAA and TAA compliant, which matters if you are buying for a government or federally funded facility.

Both control two doors, but they are built for different system architectures. The Aiphone AC-2DM-B is a networked PoE controller (IEEE 802.3af) with two Wiegand reader inputs, two solid state dry contact relays, four configurable inputs, integrated 12V DC 500mA lock power, storage for up to 100,000 credentials and 50,000 events, and IPv4/IPv6/TCP/UDP/HTTPS networking so it can be managed centrally with AC Nio software. The Codelocks AL03 DXBK is a dual standalone door controller with RFID in the A3 Door Controllers series, meaning it is administered at the door rather than over a network. Choose the AC-2DM when you want the two openings on a managed, auditable network system; choose the Codelocks A3 when standalone RFID control at the door is the goal.

Yes. The Aiphone AC-2DM-B takes its power and its connection over PoE (IEEE 802.3af) and is managed across the network with AC Nio software, so it assumes an Ethernet drop at the door. Where no network run exists, the Codelocks AL03 DXBK is a dual standalone door controller with RFID from the A3 Door Controllers series that handles two doors without a head-end system. Note that the AC-2DM-B also carries UL 294/ULC S319-05 listing and NDAA and TAA compliance, so if those are called out on your spec, the substitution needs to be confirmed against that requirement.

Up to 100,000 user credentials on the module itself, with 50,000 events stored first in, first out. That is enough to carry a large multi-family or campus population at the edge, so access decisions keep working if the network link to the server drops.

Either way. The AC-2DM runs on its own for a two-door job, or joins a larger AC Series system alongside additional AC-2DM modules and AC-2DR panels. The whole system is managed through AC Nio software, which supports partitioning if you are splitting one system across tenants or departments.

The four configurable inputs take your door position switches, request-to-exit devices, tamper contacts or alarm points, whatever the opening needs. The built-in infrared motion sensor can serve as request-to-exit at the door the module is mounted over, which saves running a separate REX. Custom scripting and actions let you tie those inputs to relay behavior, and the built-in diagnostic LCD gives you status at the door during commissioning.

The Aiphone AC-2DM-B is the one specified with Wiegand reader inputs - two of them - which is what lets it accept existing third-party Wiegand readers on both openings, along with four configurable inputs and 24V DC 1A contact rating on its relays. The Codelocks AL03 DXBK is a dual standalone door controller supplied for RFID credential use in the A3 Door Controllers series. If the job requires reusing readers already mounted at the doors, the AC-2DM-B is the one to match against, since the reader interface is stated as Wiegand.

For a multi-building rollout, the Aiphone AC-2DM-B is the one designed to scale: modules combine with additional AC-2DM units and AC-2DR panels into a larger AC Series system managed from AC Nio software with partitioning options, each module holding up to 100,000 card holders and 50,000 events. It is UL and ULC listed to UL 294/ULC S319-05 and is NDAA and TAA compliant, which matters on government and institutional specifications. The Codelocks AL03 DXBK from the A3 Door Controllers series is a standalone dual door controller, which suits isolated openings rather than a partitioned, centrally administered campus.

They match on door count and on case color - the AC-2DM comes in black and white, and the Codelocks AL03 DXBK is a black finish dual door controller - but they are not functional equivalents. The AC-2DM-B is PoE powered, supplies 12V DC 500mA lock power and 12V DC 300mA option power from the module, includes an infrared motion sensor and a built-in diagnostic LCD, and reports over the network to AC Nio. The Codelocks unit is standalone with RFID in the A3 Door Controllers series. Swapping one for the other changes how the doors are powered, credentialed, and administered, so verify the lock power source and credential type before substituting.

Two case finishes, black and white. The AC-2DM-B is the black version. Since the module mounts in view above the door rather than hidden in a closet, pick the one that disappears against your header or ceiling.

Yes. Supported protocols are IPv4, IPv6, TCP, UDP and HTTPS, so it drops onto a modern IT network without an IPv4-only carve-out, and HTTPS covers the encrypted management path your IT group will ask about.