|  |  | ARK-2250L-U3A1E | ARK-2250L-U6A1E | 
        
            | Processor | CPU | Intel   Core i3 6100U | Intel   Core i3 6100U | 
        
            | Core Number | 2 | 2 | 
        
            | Frequency | 2.3   GHz | 2.6   GHz | 
        
            | L2 Cache | 3   MB | 4MB | 
        
            | BIOS | AMI   UEFI 128 Mbit | AMI   UEFI 128 Mbit | 
        
            | Memory | Technology | DDR3L   1600 MHz | DDR3L   1600 MHz | 
        
            | Max. Capacity | 16   GB | 16   GB | 
        
            | Socket | 1   x 204-pin SO-DIMM | 1   x 204-pin SO-DIMM | 
        
            | Graphics | Controller | Intel   HD Graphics 520 | Intel   HD Graphics 520 | 
        
            | Graphic Engine | DirectX   11.3, OpenGL 4.4, and OpenCL 2.1, Full AVC/VC1/MPEG2 HW Decode | DirectX   11.3, OpenGL 4.4, and OpenCL 2.1, Full AVC/VC1/MPEG2 HW Decode | 
        
            | VGA | Up   to 1920 x 1200 @ 60Hz (No hotplug support) | Up   to 1920 x 1200 @ 60Hz (No hotplug support) | 
        
            | HDMI | HDMI   1.4a for HD video playback, 4096 x 2160 @ 24Hz | HDMI   1.4a for HD video playback, 4096 x 2160 @ 24Hz | 
        
            | Dual Display | Yes,   VGA + HDMI | Yes,   VGA + HDMI | 
        
            | Triple Display | VGA+HDMI+Optional   display module: HDMI, DP and DVI-D (DVI-D only for China) | VGA+HDMI+Optional   display module: HDMI, DP and DVI-D (DVI-D only for China) | 
        
            | Audio | Interface | Realtek   ALC888S, High Definition Audio, Line-out, Mic-in | Realtek   ALC888S, High Definition Audio, Line-out, Mic-in | 
        
            | Ethernet | LAN1 | 10/100/1000   Mbps Intel i219 GbE, support Wake On Lan | 10/100/1000   Mbps Intel i219 GbE, support Wake On Lan | 
        
            | LAN2 | 10/100/1000   Mbps Intel I210 GbE, support Wake on LAN | 10/100/1000   Mbps Intel I210 GbE, support Wake on LAN | 
        
            | I/O | Serial   Port | 4   x RS-232/422/485 port, support auto-flow control | 4   x RS-232/422/485 port, support auto-flow control | 
        
            | USB Interface | 4   x USB 3.0, 2 x USB 2.0 | 4   x USB 3.0, 2 x USB 2.0 | 
        
            | Digital I/O | 8bit | 8bit | 
        
            | Other | Watchdog   Timer | 255   levels timer interval, setup by software | 255   levels timer interval, setup by software | 
        
            | Expansion | Mini   PCIe | 2   x full size Mini PCIe with (CN15 with SIM holder) | 2   x full size Mini PCIe with (CN15 with SIM holder) | 
        
            | iDoor Module | 1   set (Optional) | 1 set (Optional) | 
        
            | Storage | HDD | Supports   one SATA 2.5" HDD Bay (Compatible with 12.5mm height HDD) (Max. Data   Transfer Rate 300 MB/s) | Supports one   SATA 2.5" HDD Bay (Compatible with 12.5mm height HDD) (Max. Data   Transfer Rate 300 MB/s) | 
        
            | SSD | 1   x full size mSATA socket (CN15, shared with mPCIe) | 1   x full size mSATA socket (CN15, shared with mPCIe) | 
        
            | Software Support | Microsoft   Windows | Windows   10, Windows 8.1, WES7, Windows 7 | Windows   10, Windows 8.1, WES7, Windows 7 | 
        
            | Linux | Support   by project | Support   by project | 
        
            | Power | Power   Type | ATX | ATX | 
        
            | Input Voltage | 12   VDC (9 ~ 36 VDC as option) | 12   VDC (9 ~ 36 VDC as option) | 
        
            | Power Adaptor | AC   to DC, DC12V/5A, 60 W (Optional) | AC   to DC, DC19 V/3.42 A, 65 W (Optional) | 
        
            | Consumption | Typical   6.92 W, Max. 41.72 W | Typical   7.96 W, Max. 43.28 W | 
        
            | Mechanical | Construction | Aluminum   housing | Aluminum   housing | 
        
            | Mounting | Din-Rail   mounting, Desk/wall-mounting, VESA mounting | Din-Rail   mounting, Desk/wall-mounting, VESA mounting | 
        
            | Dimensions | 260   x 54 x 140.2 mm (10.24" x 2.13" x 5.52") | 260   x 54 x 140.2 mm (10.24" x 2.13" x 5.52") | 
        
            | Weight | 2.3   kg (5.07 lb) | 2.3   kg (5.07 lb) | 
        
            | Environment | Operating   Temperature | With   extended temperature peripherals: -20 ~ 60° C (-4 ~ 140° F) with 0.7m/s air   flow With 2.5-inch hard disk 0 ~ 45° C (32 ~ 112° F) with 0.7m/s air flow | With   extended temperature peripherals: -20 ~ 60° C (-4 ~ 140° F) with 0.7m/s air   flow With 2.5-inch hard disk 0 ~ 45° C (32 ~ 112° F) with 0.7m/s air flow | 
        
            | Storage Temperature | -40   ~ 85° C (-40 ~ 185° F) | -40   ~ 85° C (-40 ~ 185° F) | 
        
            | Relative Humidity | 95%   @ 40° C (non-condensing) | 95%   @ 40° C (non-condensing) | 
        
            | 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. | 
        
            | Shock During Operation | With   SSD: 30 G, IEC 60068-2-27, half sine, 11 ms duration | With   SSD: 30 G, IEC 60068-2-27, half sine, 11 ms duration | 
        
            | Regulation | EMC | CE/FCC   Class B, CCC, BSMI | CE/FCC   Class A, CCC, BSMI | 
        
            | Safety | UL,   CCC, BSMI | UL,   CCC, BSMI, CB |