DA-681C Series

Features and Benefits

  • IEC 61850-3, IEEE 1613, and IEC 60255 compliant for power substation automation systems
  • EN 50121-4 compliant for railway wayside applications
  • 7th Generation Intel® Core™ Processor
  • DDR4 memory slot; up to 32 GB capacity
  • Redundant power supply (100 to 240 VAC/VDC)


Download Datasheet



The DA-681C computer is built around an Intel® Celeron® or Intel® Core™ i3 CPU and comes with dual display ports (2 x HDMI), 5 USB ports, 6 Gigabit LAN ports, two 3-in -1 RS-232/422/485 serial ports, 10 RS-485 serial ports, 6 digital input ports, and 2 digital output ports. Additionally, one 2.5” HDD/SSD slot and one mSATA slot are included to enable storage expansion for industrial applications that require large storage space for edge data acquisition.

With IEC 61850-3 and IEEE 1613 compliance, the DA-681C is sure to deliver stable and reliable system operation for power applications. EN 50121-4 compliance confirms that the DA-681C can deliver stable and reliable system operations in rail wayside applications, such as station SCADA systems, wayside disaster prevention, traction power, and signaling and safety systems, to provide an integrated view of your smart rail setup.


Front View

Rear View


CPU Intel® Core™ i3-7100U Processor (2M Cache, 2.4 GHz)
Intel® Celeron® 3965U Processor (2M Cache, 2.2 GHz)
Graphics Controller Intel® HD Graphics 630
System Memory Slot SODIMM DDR4 slot x 2
Supported OS Windows 10 Embedded IoT Ent 2019 LTSC 64-bit
Linux Debian 9
Note: OS available by CTOS
Storage Slot 2.5-inch HDD/SSD slots x 1
DRAM 32 GB max. capacity (SODIMM x 2, each supporting 2400 MHz and 16 GB maximum per module)
Computer Interface
Ethernet Ports Auto-sensing 10/100/1000 Mbps ports (RJ45 connector) x 6
Serial Ports RS-232/422/485 ports x 2, software selectable (DB9 male)
USB 2.0 USB 2.0 hosts x 3, type-A connectors
2 ports on the front panel, 1 port inside the computer
USB 3.0 USB 3.0 hosts x 3, type-A connectors
3 ports on the rear panel
Video Output HDMI x 2, HDMI connector (type A)
Serial Interface
Baudrate 183 bps to 115.2 kbps
Connector Terminal block
Isolation 2 kV
ESD 8 kV (level 4)
Serial Standards RS-232/422/485
Surge 2 kV
Serial Signals
RS-422 Tx+, Tx-, Rx+, Rx-, GND
RS-485-4w Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w Data+, Data-, GND
LED Indicators
System Power x 1
Storage x 1
Programmable x 8
LAN 2 per port (10/100/1000 Mbps)
Serial 2 per port (Tx, Rx)
Power Parameters
Power Button Reset button (front panel)
ON/OFF (rear panel)
Power Consumption 100 W (max.)
Physical Characteristics
Housing Metal
Dimensions (without ears) 440 x 316 x 44 mm (17.32 x 12.44 x 1.73 in)
Weight 9,000 g (21.82 lb)
Installation 19-inch rack mounting
Environmental Limits
Operating Temperature -40 to 70°C (-40 to 158°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Green Product RoHS, CRoHS, WEEE
Standard and Cerifications
EMC EN 55032/25
EMI CISPR 32, FCC Part 15B Class A
EMS IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m
IEC 61000-4-4 EFT: Power: 4 kV; Signal: 4 kV
IEC 61000-4-5 Surge: Power: 4 kV; Signal: 4 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8: 20 A/m
EC 61000-4-11
Power Substation IEC 61850-3, IEEE 1613
Protection Relay IEC 60255
Shock IEC 61850-3 Edition 2.0, IEC 60068-2-27, IEC 60255-21-2
Safety UL 62368-1
Time 285,419 hrs
Standards Telcordia SR332
Warranty Period 3 years
Details See www.moxa.com/warranty