User manual
ARK-3389 User Manual 4
1.2.4 Other
• Watchdog Timer: 255 levels timer interval, setup by software
• Serial Port: One RS-232 port (COM1) and One RS-232/422/485 port 
(COM2)
Note: The default setting of COM2 is RS-232. The RS-422/485 mode of 
COM2 can be supported via replacing the internal cable and adjust the 
jumper inside of the system.
• Keyboard/Mouse: One PS/2 Port to support PS/2 Mouse and PS/2 Key-
board 
• USB: Three USB 2.0 compliant universal serial bus port
• DIO: ARK-3389 provides one D-sub 8 bits Female connectors, which 
offers Digital IO communication interface ports. If you want to use DIO, 
you can find the Pin assignment as following
1.2.5 Storage
• Supports a drive bay space for 2.5’’ HDD
• Supports a Compact Flash socket for Type I/II Compact Flash disk
1.2.6 Mechanical
• Construction: Aluminum housing
• Mounting: DIN-rail mounting, Desk/wall mounting
• Dimension (W x H x D): 264.5 mm x 69.2 mm x 137.25 mm ( 10.41”x 
2.72”x 4.4” )
• Weight: 2 KG
1.2.7 Power Supply
• Output Rating 46 W ATX support
• Fuse Rating 7 A @ 125 V
• Input Voltage: 12 VDC ~ 24 VDC,
Typical:
12 VDC @ 4.5A, 
16 VDC @ 3.4 A, 
19 VDC @ 2.9 A, 
24 VDC @ 2.3 A
• Output Voltage:
+5 VDC @ 7 A
+12 VDC @ 0.5 A










