Moxa Technologies DA-681A Series Instructions for use

DA-681A Series Embedded Computer
Hardware User’s Manual
Edition 1.0, November 2015
www.moxa.com/product
© 2015 Moxa Inc. All rights reserved.

DA-681A Series Embedded Computer
Hardware User’s Manual
The software described in this manual is furnished under a license agreement and may be used only in accordance with
the terms of that agreement.
Copyright Notice
© 2015 Moxa Inc. All rights reserved.
Trademarks
The MOXA logo is a registered trademark of Moxa Inc.
All other trademarks or registered marks in this manual belong to their respective manufacturers.
Disclaimer
Information in this document is subject to change without notice and does not represent a commitment on the part of
Moxa.
Moxa provides this document as is, without warranty of any kind, either expressed or implied, including, but not limited
to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the
products and/or the programs described in this manual, at any time.
Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for
its use, or for any infringements on the rights of third parties that may result from its use.
This product might include unintentional technical or typographical errors. Changes are periodically made to the
information herein to correct such errors, and these changes are incorporated into new editions of the publication.
Technical Support Contact Information
www.moxa.com/support
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-free: 1-888-669-2872
Tel:
[phone]
Fax:
[phone]
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-free: 800-820-5036
Tel:
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Table of Contents
1. Introduction...................................................................................................................................... 1-1
Overview...........................................................................................................................................1-2
Model Descriptions and Package Checklist..............................................................................................1-2
Comparison of DA-Series Models...................................................................................................1-2
Optional Accessories....................................................................................................................1-3
Expansion Modules (can be purchased separately) ..........................................................................1-3
Optional Accessories (can be purchased separately) ........................................................................1-3
Appearance........................................................................................................................................1-4
Front View..................................................................................................................................1-4
Rear View- DA-681A-DPP & DA-681A-DPP-T...................................................................................1-4
Rear View- DA-681A-SP...............................................................................................................1-4
Dimensions........................................................................................................................................1-4
Features............................................................................................................................................1-5
Hardware Block Diagram .....................................................................................................................1-5
DA-681A Basic System ................................................................................................................1-5
Hardware Specifications ......................................................................................................................1-6
2. Hardware Installation ....................................................................................................................... 2-1
Placement Options..............................................................................................................................2-2
Desktop .....................................................................................................................................2-2
Rack mounting............................................................................................................................2-2
Wiring Requirements...........................................................................................................................2-3
Connecting the Power .........................................................................................................................2-4
Wiring the Power Inputs ......................................................................................................................2-5
For SP Models.............................................................................................................................2-5
For DPP and DPP-T Models ...........................................................................................................2-6
Power Input Wiring Description ............................................................................................................2-7
Reset Button......................................................................................................................................2-8
Front Panel LED..................................................................................................................................2-8
Connecting to a Display.......................................................................................................................2-9
Connecting USB Devices......................................................................................................................2-9
Connecting a Serial Device.................................................................................................................2-10
LAN Ports ........................................................................................................................................2-10
Connecting the IRIG-B time synchronization device (For DPP & DPP-T models only)..................................2-11
DA-IRIGB-4DIO-PCI104-EMC4 Pin Assignments ............................................................................2-11
Connecting to the DA-IRIGB-B-S Series...............................................................................................2-12
Installing the Memory Module ............................................................................................................2-14
Installing a mSATA Card....................................................................................................................2-15
Installing a SATA Hard Disk / Solid State Disk......................................................................................2-16
Installing a USB Dongle Kit ................................................................................................................2-19
3. BIOS Setup........................................................................................................................................ 3-1
Entering the BIOS Setup......................................................................................................................3-2
Main Information................................................................................................................................3-3
Advanced Settings..............................................................................................................................3-3
Boot Configuration ......................................................................................................................3-4
HDC Configuration.......................................................................................................................3-4
Video Configuration .....................................................................................................................3-5
Chipset Configuration ..................................................................................................................3-6
Hardware Monitor........................................................................................................................3-7
Security Settings ................................................................................................................................3-7
Set Supervisor Password..............................................................................................................3-8
Power Settings ...................................................................................................................................3-8
Auto Wake on S5 ........................................................................................................................3-8
Wake on LAN..............................................................................................................................3-8
Boot Settings .....................................................................................................................................3-9
Boot Type...................................................................................................................................3-9
PXE Boot to LAN..........................................................................................................................3-9
Add Boot Options ........................................................................................................................3-9
USB Boot ...................................................................................................................................3-9
EFI Device First...........................................................................................................................3-9
Boot Delay Time..........................................................................................................................3-9
Legacy.....................................................................................................................................3-10
Exit Settings ....................................................................................................................................3-10
Exit Saving Changes..................................................................................................................3-10
Save Change Without Exit ..........................................................................................................3-10
Exit Discarding Changes.............................................................................................................3-10
Load Optimal Defaults................................................................................................................3-11
Load Custom Defaults................................................................................................................3-11
Save Custom Defaults................................................................................................................3-11

Discard Changes .......................................................................................................................3-11
Upgrading the BIOS..........................................................................................................................3-11
A. Safety Installation Instructions ........................................................................................................ A-1
RTC Battery Warning...........................................................................................................................A-1
Fuse Warning.....................................................................................................................................A-1
Rack mount Warning...........................................................................................................................A-1
B. Regulatory Statement Approval ........................................................................................................ B-1

1
1. Introduction
Thank you for purchasing the DA-681A series x86-based industrial ready-to-run embedded computer.
This manual introduces the hardware installation, connector interfaces, and BIOS setup of the DA-681A. For
software configuration and management, please refer to the user’s manual for your operating system.
The following topics are covered in this chapter:

Overview

Model Descriptions and Package Checklist
Comparison of DA-Series Models
Optional Accessories
Expansion Modules (can be purchased separately)
Optional Accessories (can be purchased separately)

Appearance
Front View
Rear View- DA-681A-DPP & DA-681A-DPP-T
Rear View- DA-681A-SP

Dimensions

Features

Hardware Block Diagram
DA-681A Basic System

Hardware Specifications

DA-681A Series Hardware Introduction
1-2
Overview
The Moxa DA-681A Series x86-based rack-mount embedded computers are designed for control, monitoring,
data acquisition, and protocol conversion applications. With its robust design, the DA-681A is suitable for
industrial automation applications, including power automation, transportation, and oil and gas.
The DA-681A’s main operating system is based on the 3rd Gen Intel® Core™ Celeron 1047UE 1.4 GHz CPU and
HM65 chipset, which supports standard x86, 1 x VGA, 4 x USB, 6 Gigabit LAN ports, 2 RS/232/422/485 3-in-1
serial ports, and 10 RS-485 (RS-422 by CV) ports. The DA-681A has a mini PCIe socket for mSATA and comes
with Linux pre-installed; Windows 7 Embedded is also supported by the CTOS (Configuration To Order Service)
process.
Another plus is that the serial ports come with 2 kV digital galvanic isolation protection to guarantee
communication reliability in harsh industrial environments. In addition, the state-of-art IEC 61850-3, IEEE
1613, and IEC 60255 compliance all-in-one design provides rich interfaces especially well-suited for power
substation automation applications.
Model Descriptions and Package Checklist
The DA-681A Series includes the following models:
DA-681A-I-SP:
6 Ethernet ports, VGA, 2 RS-232/422/485 ports, 10 RS-485 ports, mSATA, SATA, USB, Single Power (RAM,
mSATA, OS not included), -25 to 55°C operating temperature
DA-681A-I-SP-LX:
6 Ethernet ports, VGA, 2 RS-232/422/485 ports, 10 RS-485 ports, mSATA, SATA, USB, Single Power, Linux
Debian 8., -25 to 55°C operating temperature
DA-681A-I-DPP:
IEC 61850-3 computer with VGA, 6 LAN ports, 2 RS-232/422/485 ports, 10 RS-485 ports, mSATA, SATA, USB,
dual power (RAM, mSATA, OS not included), -25 to 55°C operating temperature
DA-681A-I-DPP-LX:
IEC 61850-3 computer with VGA, 6 LAN ports, 2 RS-232/422/485 ports, 10 RS-485 ports, mSATA, SATA, USB,
dual power, Linux Debian 8, -25 to 55°C operating temperature
DA-681A-I-DPP-T:
IEC 61850-3 computer with VGA, 6 LAN ports, 2 RS-232/422/485 ports, 10 RS-485 ports, mSATA, SATA, USB,
dual power (RAM, mSATA, OS not included), -40 to 70°C operating temperature
DA-681A-I-DPP-T-LX:
IEC 61850-3 computer with VGA, 6 LAN ports, 2 RS-232/422/485 ports, 10 RS-485 ports, mSATA, SATA, USB,
dual power, Linux Debian 8, -40 to 70°C operating temperature
Comparison of DA-Series Models
Model Name
Serial Ports Giga
LAN
Ports
Storage Expansion System
Power Relay
IEC 61850-3
IEEE 1613
IEC 60255
3-in-1 RS-485 SATA mSATA USB
PCI-104
(for IRIG-B)
OS RAM mSATA
DA-681A-I-SP 2 10 6 1 1 4 – – – – 1 – –
DA-681A-I-SP-LX 2 10 6 1 1 4 – Linux 2G 8G 1 – –
DA-681A-I-DPP 2 10 6 1 1 4 1 – – – 2 1 
DA-681A-I-DPP-LX 2 10 6 1 1 4 1 Linux 2G 8G 2 1 
DA-681A-I-DPP-T 2 10 6 1 1 4 1 – – – 2 1 
DA-681A-I-DPP-T-LX 2 10 6 1 1 4 1 Linux 2G 8G 2 1 

DA-681A Series Hardware Introduction
1-3
Each model is shipped with following standard items:
•DA-681A rackmount computer
•Rackmount kit
•Documentation CD or DVD
•Quick installation guide (printed)
•Warranty card
Optional Accessories
Model Name Expansion Module Support Accessories
DA-IRIGB-4DIO-PCI104-EMC4 USB Dongle DA-681A HDD Kit
DA-681A-I-SP – 

DA-681A-I-SP-LX – 

DA-681A-I-DPP 
DA-681A-I-DPP-LX 
DA-681A-I-DPP-T 
 
DA-681A-I-DPP-T-LX 
Expansion Modules (can be purchased separately)
Model Description
DA-IRIGB-4DIO-PCI104-EMC4 Time synchronization expansion module, 1 IRIG-B signal input port, 3 digital inputs, 4
digital outputs (DA-681A-I-DPP series only)
Optional Accessories (can be purchased separately)
Model Description
DA-681A HDD Kit The HDD/SSD installation package, supports
single HDD/SSD.
USB Dongle Kit
The USB dongle kit can be installed inside the
DA-681A and is suitable for security
applications. For example, it can be used to
store a SCADA license or for storing the
Smart Recovery backup image.

DA-681A Series Hardware Introduction
1-4
Appearance
Front View
Rear View- DA-681A-DPP & DA-681A-DPP-T
Rear View- DA-681A-SP
Dimensions

DA-681A Series Hardware Introduction
1-5
Features
The DA-681A Basic System has the following features:
•IEC 61850-3, IEEE 1613, and IEC 60255 compliant for power substation automation systems (DPP and
DPP-T models only)
•3rd Gen Intel® Core™ Celeron 1047UE 1.4 GHz CPU
•1 built-in DDR3 memory socket
•1 mSATA for OS and 1 SATA II for storage expansion
•6 Gigabit Ethernet ports for network redundancy
•4 USB 2.0 ports for high speed peripherals
•2 isolated RS-232/422/485 and 10 isolated RS-485 ports
•Embedded Debian 8 Linux (W7E by CTOS)
•Supports both 100 to 240 VAC and VDC power inputs (single power and dual power models available)
•Optional IRIG-B expansion module available on DPP and DPP-T models
Hardware Block Diagram
DA-681A Basic System
OPT
Por t 2
SATA Gen.3, 6 Gb/s
on HM65
USB port6 and 7 are disabled
PCI Express #4
PCI Express #3
PCI Express #2
2C/2T/2M B/1.4 GHz/ 17W
HD Gr aph i c s
Tj = 0~105'c
1047UE
PCI Express #6
Por t 0
mSATA
SATA Gen.2, 3 Gb/s
Por t 1
PCI #1,2 PCI #3,4,5,6
UART X2
Timing Sequence
ISL95831 + ISL95870
VCORE (IMVP-7)
MU860 X 2
3nd Gen. Intel Core Processor Family (22nm)
CPU ( Ivy Bridge)
CPLD LC4032V-75TN44C
Tj = 0~108'C
25x25m m
FCBGA989
INTEL HM65 (TDP 3.9W)
PCH
DM IFDI
8GB max. for CPU
SO-DIMM
2.7 Gb/s each channe l 20 Gb/s each dire ction
SATA Gen.3, 6 Gb/s
USB 2.0, 480Mb/s
VGA CONN
Analog VGA
Super I/O
DDR3 1066/1333
2048x1536 @ 75Hz, 32-bit
SATA1 CONN
LPC
SATA2 CONN
RealTek 8111E x6
PCIe Giga-LAN chip
Port-80
(Debug)
IT8783F
RJ45 X 6
PCI Express #5
PCI Express #1
SPI
BIOS
MX25L6406EM2I
USB2.0 x2
(Type A)
Re ar
Front
PCI-104
terminal block
RS-485 X 10
DB9
USB2.0 x2
(Wafer)
USB2.0 x2
(Wafer)
FCBGA1023
PCI Express #7
PCIE to PCI
XIO2001
FCBGA989

DA-681A Series Hardware Introduction
1-6
Hardware Specifications
Computer
CPU:
3rd Gen Intel® Core™ Celeron 1047UE 1.4 GHz
OS:
Linux Debian 8 (pre-installed)
W7E available by CTOS
System Chipset:
Intel HM65
BIOS:
64 Mbit Flash BIOS, PCI Plug & Play, ACPI
System Memory:
8 GB capacity, 2 GB for Linux pre-installed; 1 slot of DDR3-1066/1333 SO-DIMM SDRAM
Expansion Bus:
PCI/104 onboard (DPP models only)
USB:
4 USB 2.0 ports, system bootable, type A connector
Storage
Built
-in: 8 GB for Linux (pre-installed in mSATA)
Storage Expansion
:1 SATA 3.0 interface connector
Display
Graphics Controller:
Intel® HD Graphics (Integrated)
Display Memory:
Dynamic video memory (shares up to 32 MB of system memory)
Display Interface:
CRT Interface for VGA output (DB15 female connector)
Resolution:
CRT display mode with pixel resolution up to 2048 x 1536 at 75 Hz
Ethernet Interface
LAN:
6 auto-sensing 10/100/1000 Mbps ports
Magnetic Isolation Protection:
1.5 kV built-in
Serial Interface
Serial Standards:
• 2 R
S-232/422/485 ports (DB9 male)
• 10 RS
-485 ports (terminal block)
ESD Protection:
15 kV for all signals
Surge Protection:
4 kV (DPP & DPP-T only)
Isolation:
2 kV digital galvanic isolation
Serial Communication Parameters
Data Bits:
5, 6, 7, 8
Stop Bits:
1, 1.5, 2
Parity:
None, Even, Odd, Space, Mark
Flow Control:
RTS/CTS, XON/XOFF
Baudrate:
50 bps to 115.2 kbps
Serial Signals
RS
-232: TxD, RxD, DTR, DSR, RTS, CTS, DCD, GND
RS
-422: TxD+, TxD-, RxD+, RxD-, GND
RS
-485-4w: TxD+, TxD-, RxD+, RxD-, GND
RS
-485-2w: Data+, Data-, GND
LEDs
System:
Power, Storage
LAN:
100M x 6, 1000M x 6
Serial:
RS
-232/422/485: 2 x Tx, 2 x Rx
RS
-485: 10 x Tx, 10 x Rx
Programmable:
6 LEDs
Power Failure:
LED x 2 (dual power models)
Switches and Buttons
Power Button:
On/Off (on rear panel)
Reset Button:
Hard Reset (on front panel)

DA-681A Series Hardware Introduction
1-7
Physical Characteristics
Housing:
SECC sheet metal (1 mm)
Weight:
4.5 kg
Dimensions:
440 x 315 x 45 mm (17.32 x 12.40 x 1.77 in), 19 inch 1U height
Mounting:
Standard 19-inch rackmount
Environmental Limits
Operating Temperature:
SP Models:
-25 to 55°C (-13 to 131°F)
DPP Models:
-25 to 55°C (-13 to 131°F)
DPP
-T Models: -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)
Anti
-Vibration: 7 mm (2-9 Hz), 20 m/s/s (9-200 Hz), 15 m/s/s (200-500 Hz) @ IEC-61850-3, IEC
60870
-2-2/Cm/(3M6)/(4M6), sine wave, 2-500 Hz, 1 Oct/min, 10 cycles, 2 hrs 40 mins per axis
Anti
-Shock: 300 m/s2 @ IEC-61850-3, IEC 60870-2-2/Cm/(3M6)/(4M6), half sine wave, 11 ms
Power Requirements
Input Voltage:
Single or dual inputs, 100 to 240 VAC/VDC auto-ranging, 47 to 63 Hz, terminal block
Power Consumption:
30 W
Standards and Certifications
Safety:
LVD, UL, cUL
Electrical Substation:
IEC 61850-3, IEC 60255, IEEE 1613
Protection Relay:
IEC 60255
EMC:
FCC, CE (Class A)
Green Product:
RoHS, CRoHS, WEEE
Reliability
Alert Tools:
• Built
-in buzzer and RTC (real-time clock) with battery lithium backup
• Built
-in 1 relay for visual/audio alarm.
Automatic Reboot Trigger:
Built-in watchdog timer, configurable for restarts at 1 to 255 second intervals
MTBF (mean time between failures):
DA
-681A-I-SP: 240784 hrs
DA
-681A-I-DPP: 215436 hrs
DA
-681A-I-DPP-T: 215436 hrs
Warranty
Warranty Period:
3 years
Details:
See www.moxa.com/warranty
WARNING
C
ommunication between a serial device and a Moxa UART port may not work correctly if the serial device
communicat
es at a baud rate that is not within the tolerance of a rate calculated from either formula A or
formula B
.

2
2. Hardware Installation
The DA-681A Series of embedded computers are compact and rugged, making them suitable for industrial
applications. The LED indicators allow users to monitor performance and identify trouble spots quickly, and
multiple ports are provided for connecting a variety of different devices. The DA-681A embedded computers
come with a reliable and stable hardware platform that lets you devote the bulk of your time to application
development. This chapter describes hardware installation and connector interfaces of the DA-681A embedded
computers.
The following topics are covered in this chapter:

Placement Options
Desktop
Rack mounting

Wiring Requirements

Connecting the Power

Wiring the Power Inputs
For SP Models
For DPP and DPP-T Models

Power Input Wiring Description

Reset Button

Front Panel LED

Connecting to a Display

Connecting USB Devices

Connecting a Serial Device

LAN Ports

Connecting the IRIG-B time synchronization device (For DPP & DPP-T models only)
DA-IRIGB-4DIO-PCI104-EMC4 Pin Assignments

Connecting to the DA-IRIGB-B-S Series

Installing the Memory Module

Installing a mSATA Card

Installing a SATA Hard Disk / Solid State Disk

Installing a USB Dongle Kit

DA-681A Series Hardware Hardware Installation
2-2
Placement Options
Desktop
Place your DA-681A on a clean, flat, well-ventilated desktop. For better ventilation, leave some space between
the DA-681A and other equipment. Do not place equipment or objects on top of the DA-681A, as this might
damage the computer’s internal components.
Rack mounting
The DA-681A has rack mount supports for installing the embedded computer on a standard rack.
ATTENTION!
For maximum safety, a
t least two persons should work together to lift the embedded computer when
mounting
it in
to the rack.
Before you lift or move the embedded computer, make sure
the power to both the rack system and the
device
is turned off
.
Four rack mount screws are required to attach the DA-681A to a standard rack.
Follow these steps to install the DA-681A on a rack.
Step 1: Installing the rack mount supports.
Take the rack mount supports out of the packages: there are two ears and 12 screws (one ear and one set of
screws are shown at right). Each ear requires 6 screws to attach to the rack.
Step 2: Installing the rack mount ears to the DA-681A.
Use 6 screws to attach one mounting ear to one side of the DA-681A, as shown at right. Repeat this procedure
for the other side of the DA-681A.

DA-681A Series Hardware Hardware Installation
2-3
Step 3: Installing the DA-681A to a rack.
Gently slide the DA-681A onto the rack, and then use the screws provided by the rack supplier to affix the
computer to the rail, as shown in the pictures below.
NOTE
four screws
are required to attach the DA-681A to the rack. Use two screws on the
left side and two screws on
the right side
.
As a final check, make sure that the four screws are firmly attached to the rack.
Wiring Requirements
The following common safety precautions should be observed before installing any electronic device:
•Use separate paths to route wiring for power and devices. If power wiring and device wiring paths must
cross, make sure the wires are perpendicular at the intersection point.
•You can use the type of signal transmitted through a wire to determine which wires should be kept separate.
The rule of thumb is that wiring that shares similar electrical characteristics can be bundled together.
•Keep input wiring and output wiring separate.
•When necessary, it is strongly advised that you label wiring to all devices in the system.
ATTENTION
Do not run signal or communication wiring and power wiring in the same wire conduit. To avoid interference,
wires with different signal characteristics should be routed separately.

DA-681A Series Hardware Hardware Installation
2-4
ATTENTION
Safety First!
Be sure to disconnect the power cord before installing and/or wiring
your device.
Electrical Current Caution!
Calculate the maximum possible current in each power wire and common wire. Observe all
electrical codes
dictating the maximum current allowable for each wire size.
If the current goes above the maximum ratings, the wiring could overheat, causing serious damage to your
equipment.
Temperature Caution!
Be
careful when handling the unit. When the unit is
plugged in, the internal components generate heat, and
consequently the
outer casing may feel hot to the touch.
Connecting the Power
The DA-681A offers both single power and dual power inputs. Use a screwdriver to remove the screws. Connect
the power cord to the screws and then attach the screws to the unit. For single power models (SP), use Power
1 only; for dual power models (DPP and DPP-T), use both Power 1 and Power 2 for power input installation.
Refer to the following figure for detailed information.

DA-681A Series Hardware Hardware Installation
2-5
Wiring the Power Inputs
For SP Models
AC Terminal
DC Terminal

DA-681A Series Hardware Hardware Installation
2-6
For DPP and DPP-T Models
AC Terminal
DC Terminal

DA-681A Series Hardware Hardware Installation
2-7
Power Input Wiring Description
Read the following section for a detailed power input wiring description.
SP Model power input wiring description
Terminal Number Description Note
1 N/C No function
2 Line/DC+ Line/DC+ is connected to the positive (+) terminal if the power
source is DC, or to the Line terminal if the power source is AC.
3 N/C No function
4 Neutral/DC– Neutral/DC– is connected to the negative (–) terminal if the power
source is DC, or to the Neutral terminal if the power source is AC.
5 N/C No function
6 N/C No function
DPP and DPP-T Model power input wiring description
Terminal Number Description Note
1 PWR1 Line/DC+
PWR1 Line/DC+ is connected to the positive (+) terminal if the
power source is DC, or to the Line terminal if the power source is
AC.
2 PWR1 Neutral/DC-
PWR1 Neutral/DC-is connected to the negative (-) terminal if
the power source is DC, or to the Neutral terminal if the power
source is AC.
3 NC Reserved for future customization.
4 Signal Ground Signal Ground is connected to the earth terminal for AC power
source 1.
5 COM COM pin of alarm relay
6 NO Normal Open pin of alarm relay
7 Signal Ground Signal Ground is connected to the earth terminal for AC power
source 1.
8 NC Reserved for future customization.
9 PWR2 Line/DC+
PWR2 Line/DC+ is connected to the positive (+) terminal if the
power source is DC, or to the Line terminal if the power source is
AC.
10 PWR2 Neutral/DC-
PWR2 Neutral/DC-is connected to the negative (-) terminal if
the power source is DC, or to the Neutral terminal if the power
source is AC.

DA-681A Series Hardware Hardware Installation
2-8
Reset Button
Pressing the Reset button initiates a hardware warm reboot. The button plays the same role as a desktop PC’s
reset button. After pressing the reset button, the system will reboot automatically. During normal use, you
should NOT use the Reset Button. You should only use this button if the software is not working properly. To
protect the integrity of data being transmitted or processed, you should always reset the system from the
operating system with the software reboot function.
Front Panel LED
There are 46 LED indicators on the front panel. Information about each LED is given in the following table.
LED Color Description
Serial Port TX 1-12 Green Serial port is transmitting data
Off Not operating
Serial Port RX 1-12 Yellow Serial port is receiving data
Off Not operating
Power Green Power is on
Off No power input or power error exists
Storage Yellow/Blinking Data is being written to or read from the storage unit
Off Storage unit is idle
Power Fail 1 Red Power 1 has failed (for dual power models only)
Off Power is being properly supplied
Power Fail 2 Red Power 2 has failed (for dual power models only)
Off Power is being properly supplied
Gigabit LAN LEDs 1-6 Green 100 Mbps Ethernet mode
Yellow 1000 Mbps (Gigabit) Ethernet mode
Off Not operating, or in 10 Mbps Ethernet mode
Programmable 1-6 Green Defined by user

DA-681A Series Hardware Hardware Installation
2-9
Connecting to a Display
Your DA-681A embedded computer comes with a D-Sub 15-pin female connector to connect to the VGA
monitor. Be sure to remove the power before you connect or disconnect the monitor cable.
Pin No. Signal Definition
1 RED
2 GREEN
3 BLUE
4 –
5 GND
6 CRT_DETECT#
7 GND
8 GND
9 +5V
10 GND
11 –
12 DDC_DATA
13 HSYNC
14 VSYNC
15 –
Connecting USB Devices
The DA-681A embedded computer has four USB 2.0 ports, two on the rear panel and two on the front panel.
All of the ports are UHCI, Rev 2.0 compliant and support Plug & Play and hot swapping. These ports can be used
to connect USB devices, such as a keyboard, mouse, USB flash disk, and USB CD-ROM. In addition, both USB
ports support system boot up, which can be activated by modifying the BIOS settings. The chapter “BIOS Setup”
describes the configuration process in detail.