| ARK-1251-S3A1 | ARK-1251-S7A1 | ||
| Processor | CPU | Intel® Core™ Ultra 5 125U | Intel® Core™ Ultra 7 155U |
| Processor | Core Number | 12 | 12 |
| Processor | Frequency | 1.3 GHz | 1.7GHz |
| Processor | BIOS | AMI EFI 256 Mbit | AMI EFI 256 Mbit |
| Memory | Technology | DDR5 5600 MHz | DDR5 5600 MHz |
| Memory | Max. Capacity | 96 GB (up to 48GB per DIMM) | 96 GB (up to 48GB per DIMM) |
| Memory | Socket | 2 x 260-pin SO-DIMM | 2 x 260-pin SO-DIMM |
| Memory | ECC Support | No | No |
| Graphics | HDMI | 1 x HDMI 2.1: Up to 7680x4320@60Hz | 1 x HDMI 2.1: Up to 7680x4320@60Hz |
| Graphics | DP | 1 x DP 1.4a: Up to 7680x4320@60Hz | 1 x DP 1.4a: Up to 7680x4320@60Hz |
| Graphics | Dual Display | HDMI + DP | HDMI + DP |
| Audio | Main System | Realtek ALC888S, High Definition Audio, Line-out, Mic-in | Realtek ALC888S, High Definition Audio, Line-out, Mic-in |
| Ethernet | Controller | 3 | 3 |
| Ethernet | LAN1 | 10/100/1000/2500 Mbps Intel i226 GbE, support Wake On LAN | 10/100/1000/2500 Mbps Intel i226 GbE, support Wake On LAN |
| Ethernet | LAN2 | 10/100/1000/2500 Mbps Intel i226 GbE, support Wake On LAN | 10/100/1000/2500 Mbps Intel i226 GbE, support Wake On LAN |
| Ethernet | LAN3 | 10/100/1000 Mbps Intel i210 GbE, support Wake On LAN | 10/100/1000 Mbps Intel i210 GbE, support Wake On LAN |
| I/O Interface | Serial | 4 | 4 |
| I/O Interface | Serial Port | 2 x RS-232/422/485, 2 x RS-422/485, with auto flow control | 2 x RS-232/422/485, 2 x RS-422/485, with auto flow control |
| I/O Interface | USB Interface | 2 x USB 3.2, 2 x USB 2.0 | 2 x USB 3.2, 2 x USB 2.0 |
| I/O Interface | GPIO | 8-bit | 8-bit |
| I/O Interface | Optional I/O | 1 x CANBus 2.0 (DB9 connector) | 1 x CANBus 2.0 (DB9 connector) |
| Expansion | M.2 | 1x M.2 2230 E key (NVMe, PCIe x2), 1x M.2 2280 B key with nano SIM holder (NVMe/SATA, PCIe x2), 1x M.2 2280 M key (NVMe, PCIe x4) | 1x M.2 2230 E key (NVMe, PCIe x2), 1x M.2 2280 B key with nano SIM holder (NVMe/SATA, PCIe x2), 1x M.2 2280 M key (NVMe, PCIe x4) |
| Storage | SATA and PCIe/NVMe | 1x M.2 2280 M key (NVMe, PCIe x4) (default), 1x M.2 2280 B key with nano SIM holder (NVMe, PCIe x2/ SATA) | 1x M.2 2280 M key (NVMe, PCIe x4) (default), 1x M.2 2280 B key with nano SIM holder (NVMe, PCIe x2/ SATA) |
| Others | Watchdog timer | 255 levels timer interval, setup by software | 255 levels timer interval, setup by software |
| Others | TPM | TPM 2.0 | TPM 2.0 |
| Software Support | Microsoft Windows | Windows 10/11 IoT Enterprise LTSC | Windows 10/11 IoT Enterprise LTSC |
| Operating System | Ubuntu | V | V |
| Software Support | Linux | Ubuntu 24.04 | Ubuntu 24.04 |
| Power | Power Type | AT/ATX | AT/ATX |
| Power | Input Voltage | 12 ~ 28 VDC | 12 ~ 28 VDC |
| Power Consumption | Typical | 17.83W | 18.19W |
| Power Consumption | Max. | 59.44W | 61.74W |
| Environment | Vibration During Operation | With SSD: 3 Grms, IEC 60068-2-64, random, 5 ~ 500 Hz, 1 hr/axis | With SSD: 3 Grms, IEC 60068-2-64, random, 5 ~ 500 Hz, 1 hr/axis |
| Environment | Shock During Operation | With SSD/mSATA: 30G | With SSD/mSATA: 30G |
| Environment | Temperature (Operating) | -20 ~ 60° C (-4 ~ 140° F) | -20 ~ 60° C (-4 ~ 140° F) |
| Environment | Storage Temperature | - 40 ~ 85° C (-40 ~185° F) | - 40 ~ 85° C (-40 ~185° F) |
| Environment | Relative Humidity | 95% @ 40° C (non-condensing) | 95% @ 40° C (non-condensing) |
| Mechanical | Construction | Aluminum housing | Aluminum housing |
| Mechanical | Mounting | DIN-rail/Wall Mount | DIN-rail/Wall Mount |
| Mechanical | Dimensions | 60 x 173 x 141 mm (2.36 x 6.73 x 5.55 in) | 60 x 173 x 141 mm (2.36 x 6.73 x 5.55 in) |
| Mechanical | Weight | 1.5 kg (3.3lb) | 1.5 kg (3.3lb) |
| Certification | EMC | CE/FCC Class B, CCC, BSMI, UKCA | CE/FCC Class B, CCC, BSMI, UKCA |
| Certification | Safety Certifications | UL, CB, CCC | UL, CB, CCC |
Advantech ARK-1251 Intel® Core Ultra U series processor with thee LAN, four COM, HDMI, DP, GbE, GPIO, Remote Switch, USB x 6
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