ADVANTECH ARK-1251 — Box PC
DIN-rail fanless box PC with an Intel Core Ultra 7 155U or Core Ultra 5 125U processor (12 cores, 21 – 22 TOPS with NPU) and up to 96 GB DDR5-5600 — HDMI + DP, 3 × GbE, 4 × COM, 6 × USB, M.2 E/B/M key, TPM 2.0, 12 – 28 VDC, −20 to 60 °C.
Status: In production
Product: DIN-rail fanless box PC — Intel Core Ultra 5/7, NPU, 3 × GbE, 4 × COM, 3 × M.2
CPU: Core Ultra 7 155U / Core Ultra 5 125U (12 cores, NPU)
Interfaces: HDMI + DP · 3 × GbE · 4 × COM · 6 × USB · 8 × DIO · iDoor
Dimensions: 60 × 173 × 141 mm · 1,5 kg
Power: 12 – 28 VDC
ARK-1251 is the most powerful DIN-rail model of the ARK-1000 series: with the built-in NPU of an Intel Core Ultra 7 155U or Core Ultra 5 125U (12 cores — 2 P + 8 E + 2 LP-E) Advantech states 21 – 22 TOPS (INT8) of AI capability, and DDR5-5600 memory scales to 96 GB across two slots. The combination targets running inference on camera images (quality inspection, object counting), OPC UA/MQTT data collection and SCADA/HMI server roles in a single fanless box. Three Intel GbE ports (two 2.5GbE, one 1GbE), four serial ports (2 × RS-232/422/485 + 2 × RS-422/485), two USB 3.2 and four USB 2.0 plus 8-bit DIO sit on the front; displays are driven over 4K HDMI and DisplayPort.
There are three M.2 slots: 2280 M key (NVMe PCIe ×4, default storage), 2280 B key with nano-SIM holder (NVMe PCIe ×2 / SATA or a 5G module) and 2230 E key (Wi-Fi or NVMe PCIe ×2). TPM 2.0 is on board; the iDoor slot takes MOS modules (with the AMO-I032 kit) or M.2 B key-based PCM-3xD cards (isolated RS-232, 16 DI / 8 DO, TSN-capable 2.5GbE) — the M.2 E key is unavailable while a MOS module is fitted. An M.2 SSD thermal kit and thermal pads are included. 12 – 28 VDC input, 18 W typical and 62 W maximum consumption; the 120 W adapter and wall/VESA kits are optional. Windows 10/11 Enterprise and Ubuntu 24.04 are supported; EdgeBMC provides out-of-band management, and DeviceOn and the Edge AI SDK handle remote management and model deployment.
Technical specifications
| ARK-1251 | |
|---|---|
| Processor | |
| CPU | Intel Core Ultra 7 155U (S7A1/S7A1U) · Intel Core Ultra 5 125U (S3A1/S3A1U) |
| Core number | 12 (2 P + 8 E + 2 LP-E) |
| Frequency | Ultra 7 155U: 1.7 GHz · Ultra 5 125U: 1.3 GHz |
| AI capability | 22 TOPS (INT8, Ultra 7) · 21 TOPS (INT8, Ultra 5) |
| BIOS | AMI EFI 256 Mbit |
| Memory | |
| Technology | Dual-channel DDR5 5600 MHz |
| Max. capacity | 96 GB (2 slots, up to 48 GB per DIMM) |
| Socket | 2 × 262-pin SO-DIMM |
| ECC support | No |
| Graphics and display | |
| Graphics chipset | Intel Graphics |
| HDMI | 1 × HDMI 2.1 — datasheet: up to 4096 × 2160 @ 60 Hz; web table: up to 7680 × 4320 @ 60 Hz |
| DisplayPort | 1 × DP 1.4a — datasheet: up to 4096 × 2160 @ 60 Hz; web table: up to 7680 × 4320 @ 60 Hz |
| Dual display | HDMI + DP |
| Ethernet | |
| LAN | LAN1 / LAN2: Intel i226-LM 2.5GbE · LAN3: Intel i210 1GbE; all Wake-on-LAN |
| I/O interface | |
| Serial ports | 2 × RS-232/422/485 + 2 × RS-422/485, with auto flow control |
| USB | 2 × USB 3.2, 4 × USB 2.0 |
| GPIO | 8-bit programmable DIO |
| CANBus | Optional (via cable, replacing GPIO) |
| Audio | Realtek ALC888S High Definition Audio; line-out, mic-in |
| Expansion and storage | |
| M.2 | 1 × M.2 2230 E key (NVMe, PCIe ×2), 1 × M.2 2280 B key with nano-SIM holder (NVMe PCIe ×2 / SATA), 1 × M.2 2280 M key (NVMe, PCIe ×4) |
| iDoor | 1 slot — MOS modules (with AMO-I032 kit) or M.2 B key PCM-3xD cards; M.2 E key unavailable with a MOS module fitted |
| Storage | 1 × M.2 2280 M key NVMe (default), 1 × M.2 2280 B key NVMe/SATA |
| TPM | TPM 2.0 on board (NPCT764) |
| Watchdog timer | 255-level timer interval, set by software |
| Software | |
| Microsoft Windows | Windows 10 Enterprise, Windows 11 Enterprise (web table: IoT Enterprise LTSC) |
| Linux | Ubuntu 24.04 |
| Remote management | EdgeBMC (OOB), DeviceOn, Edge AI SDK |
| Power | |
| Power type | AT / ATX |
| Input voltage | 12 – 28 VDC |
| Power adaptor | AC/DC 24 V, 120 W (optional) |
| Power consumption | Typical (OS idle) 18.19 W (Ultra 7) · 17.83 W (Ultra 5); max. (full load) 61.74 · 59.44 W |
| Mechanical | |
| Construction | Aluminum housing |
| Dimensions (W × H × D) | 60 × 173 × 141 mm |
| Weight | 1,5 kg |
| Mounting | DIN-rail / wall; VESA kit optional |
| Environment | |
| Operating temperature | −20 to 60 °C (with extended-temperature peripherals, 0.7 m/s airflow) |
| Storage temperature | −40 to 85 °C |
| Relative humidity | 95 % @ 40 °C (non-condensing) |
| Vibration during operation | With SSD: 3 Grms, IEC 60068-2-64, random, 5 – 500 Hz, 1 hr/axis (with wall mount) |
| Shock during operation | With SSD: 30 G, IEC 60068-2-27, half sine, 11 ms (with wall mount) |
| Certification | |
| EMC | CE/FCC Class B, CCC, UKCA, BSMI |
| Safety | UL, CB, CCC, UKCA |
Key features
- Intel Core Ultra 5 / Ultra 7 processor
- DDR5-5600 SO-DIMM memory, up to 96 GB
- M.2 E, B and M key slots for storage and wireless modules
- Up to 3 × GbE, 4 × serial ports, 8-bit DIO, optional CANBus
- TPM 2.0 on board
- Dual displays with HDMI + DP
- 2 × USB 3.2 and 4 × USB 2.0
- 12 – 28 V wide-range power input
- −20 to 60 °C extended operating temperature
- DIN-rail system with essential I/O ports on the front bezel
- EdgeBMC OOB, DeviceOn and Edge AI SDK support
Ordering information
| Part number | Description |
|---|---|
| ARK-1251-S3A1 | Core Ultra 5 125U; 2 memory sockets (up to 96 GB); made in China |
| ARK-1251-S3A1U | Core Ultra 5 125U; same hardware as S3A1; made in Taiwan |
| ARK-1251-S7A1 | Core Ultra 7 155U; 2 memory sockets (up to 96 GB); made in China |
| ARK-1251-S7A1U | Core Ultra 7 155U; same hardware as S7A1; made in Taiwan |
Memory, storage and operating system are bundled on request at order time.
Accessories and optional items
| Part number | Description |
|---|---|
| 96PSA-A120W24T2-4 | AC/DC adapter 24 V, 120 W |
| AMK-W006 | Wall mount kit |
| AMK-V023E | VESA mount kit (must be used with AMK-W006) |
| 1700030518-01 | CANBus cable (replacing GPIO) |
| 1960103315N010 | M.2 3052 extension bracket |
| AMO-I032 | M.2 B key expansion kit for mPCIe iDoor (order together with MOS modules) |
| MOS-2120-Z1101E | iDoor: Gigabit Ethernet module, 1-ch, PCIe |
| MOS-1130Y-0202 | iDoor: isolated CANBus, 2-ch, DB9, PCIe |
| MOS-1110Y-0101E | iDoor: isolated 16 DI / 8 DO, DB37, PCIe |
| MOS-1120Y-0202E | iDoor: isolated RS-232, 2 ports, DB9, PCIe |
| PCM-34D2R2-AE | Isolated RS-232, 2 × DB9, M.2 B key (2242, USB) |
| PCM-37D24DI-AE | 24-ch isolated digital I/O, 16 DI / 8 DO, DB37 |
| PCM-34R1TP-AE | Intel I225 2.5 Gb/s, IEEE 1588, TSN, 1 × RJ45, M.2 |
Is this box PC right for your project?
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All product specifications are subject to change without notice; data compiled from Advantech’s ARK-1251 datasheet dated 19 December 2025 and the advantech.com product page.
Source: Advantech product data