Nexcom DNA 1120A User manual

NEXCOM International Co., Ltd.
NEXCOM International Co., Ltd.
Published April 2014 www.nexcom.com
Network and Communication Solutions
Network Security Appliance
DNA 1120/1120A
User Manual

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. ii DNA 1120/1120A User Manual
Contents
Contents
Preface
Copyright ............................................................................................. iv
Disclaimer ............................................................................................. iv
Acknowledgements .............................................................................. iv
Regulatory Compliance Statements ....................................................... iv
Declaration of Conformity...................................................................... iv
RoHS Compliance ................................................................................... v
Warranty and RMA ................................................................................ vi
Safety Information ................................................................................vii
Installation Recommendations................................................................vii
Safety Precautions.................................................................................viii
Technical Support and Assistance........................................................... ix
Conventions Used in this Manual........................................................... ix
Global Service Contact Information......................................................... x
Package Contents..................................................................................xii
Ordering Information ............................................................................xiii
Chapter 1: Product Introduction
Overview ................................................................................................1
Key Features.........................................................................................1
Hardware Specifications..........................................................................2
Getting to Know DNA 1120/1120A ........................................................3
Front Panel ...........................................................................................3
Rear Panel ............................................................................................4
Chapter 2: Jumpers And Connectors
Before You Begin ....................................................................................5
Precautions .............................................................................................5
Jumper Settings ......................................................................................6
Locations of the Jumpers and Connectors...............................................7
DNB 1120 ............................................................................................7
Jumpers..................................................................................................8
Clear CMOS Select ...............................................................................8
CF Card Master/Slave Select..................................................................8
H/W Reset ............................................................................................9
Power Type Select.................................................................................9
Connectors Pin Definitions....................................................................10
External I/O Interface ........................................................................10
VGA Connector .............................................................................10
12V DC-in......................................................................................10
Power Switch.................................................................................11
RJ45 Type Console Port (RS232 only)..............................................11
USB Ports.......................................................................................12
Copper LAN Port (CON1A).............................................................12
Copper LAN Port (CON1B) .............................................................13
Copper LAN Port (CON1C).............................................................13
Copper LAN Port (CON1D).............................................................14

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. iii
Contents
DNA 1120/1120A User Manual
Internal Connectors..........................................................................15
SATAII Port (J1)...............................................................................15
SATAII Port (J3)...............................................................................15
SATA Power Connector ..................................................................16
SATA DOM Power Connector.........................................................16
Digital I/O Connector .....................................................................17
COM2 Connector (RS232)..............................................................17
CompactFlash ................................................................................18
USB Connector ..............................................................................19
Parallel Connector..........................................................................19
PS/2 Keyboard/Mouse Connector...................................................20
GAL Programming Connector ........................................................20
System Fan Connector ...................................................................21
PCI Slot..........................................................................................21
Mini PCI Slot ..................................................................................23
Chapter 3: System Setup
Removing the Chassis Cover ................................................................25
Installing a DIMM..................................................................................26
Installing a CompactFlash Card .............................................................28
Installing a SATA Hard Drive ..................................................................30
Installing a PCI Card..............................................................................35
Installing a Mini PCI Card......................................................................38
Installing the System into a Rack Cabinet ..............................................40
Rackmount Instructions ....................................................................40
Chapter 4: BIOS Setup
About BIOS Setup.................................................................................42
When to Configure the BIOS.................................................................42
Default Configuration...........................................................................43
Entering Setup......................................................................................43
Legends................................................................................................43
BIOS Setup Utility..................................................................................44
Main ..................................................................................................44
Advanced ...........................................................................................45
PCIPnP................................................................................................57
Boot ...................................................................................................58
Security ..............................................................................................61
Chipset...............................................................................................62
Exit.....................................................................................................65
Appendix A: Watchdog Timer
Watchdog Timer Setting .......................................................................66
CRF6 (Default 0x00)..............................................................................66
Watch Dog Sample Code......................................................................67
Appendix B: Bypass Specifications
BTCR - Bypass Timer Configuration Register = 0XF2..............................68
BCSR - Bypass Control Status Register = 0XF3.......................................68
Bypass Control Register Bit Definitions ..................................................69
Bypass Timer Configuration Register...................................................69
Bypass Control Status Register (Segment 1 only).................................70
Bypass Mode Table .............................................................................70

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. iv DNA 1120/1120A User Manual
Preface
PrefaCe
Regulatory Compliance Statements
This section provides the FCC compliance statement for Class B devices
and describes how to keep the system CE compliant.
Declaration of Conformity
FCC
This equipment has been tested and verified to comply with the limits for
a Class B digital device, pursuant to Part 15 of FCC Rules. These limits are
designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equip-
ment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. Operation of this equipment in a
residential area (domestic environment) is likely to cause harmful interfer-
ence, in which case the user will be required to correct the interference
(take adequate measures) at their own expense.
CE
The product(s) described in this manual complies with all applicable Euro-
pean Union (CE) directives if it has a CE marking. For computer systems to
remain CE compliant, only CE-compliant parts may be used. Maintaining
CE compliance also requires proper cable and cabling techniques.
Copyright
This publication, including all photographs, illustrations and software, is
protected under international copyright laws, with all rights reserved. No
part of this manual may be reproduced, copied, translated or transmitted
in any form or by any means without the prior written consent from
NEXCOM International Co., Ltd.
Disclaimer
The information in this document is subject to change without prior notice
and does not represent commitment from NEXCOM International Co., Ltd.
However, users may update their knowledge of any product in use by con-
stantly checking its manual posted on our website: http://www.nexcom.
com. NEXCOM shall not be liable for direct, indirect, special, incidental, or
consequential damages arising out of the use of any product, nor for any
infringements upon the rights of third parties, which may result from such
use. Any implied warranties of merchantability or fitness for any particular
purpose is also disclaimed.
Acknowledgements
DNA 1120/1120A is a trademark of NEXCOM International Co., Ltd. All
other product names mentioned herein are registered trademarks of their
respective owners.

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. vDNA 1120/1120A User Manual
Preface
RoHS Compliance
NEXCOM RoHS Environmental Policy and Status
Update
NEXCOM is a global citizen for building the digital infra-
structure. We are committed to providing green products
and services, which are compliant with European Union
RoHS (Restriction on Use of Hazardous Substance in Electronic Equipment)
directive 2002/95/EU, to be your trusted green partner and to protect our
environment.
RoHS restricts the use of Lead (Pb) < 0.1% or 1,000ppm, Mercury (Hg)
< 0.1% or 1,000ppm, Cadmium (Cd) < 0.01% or 100ppm, Hexavalent
Chromium (Cr6+) < 0.1% or 1,000ppm, Polybrominated biphenyls (PBB) <
0.1% or 1,000ppm, and Polybrominated diphenyl Ethers (PBDE) < 0.1% or
1,000ppm.
In order to meet the RoHS compliant directives, NEXCOM has established an
engineering and manufacturing task force in to implement the introduction
of green products. The task force will ensure that we follow the standard
NEXCOM development procedure and that all the new RoHS components
and new manufacturing processes maintain the highest industry quality
levels for which NEXCOM are renowned.
The model selection criteria will be based on market demand. Vendors and
suppliers will ensure that all designed components will be RoHS compliant.
How to recognize NEXCOM RoHS Products?
For existing products where there are non-RoHS and RoHS versions, the suffix
“(LF)” will be added to the compliant product name.
All new product models launched after January 2006 will be RoHS compliant.
They will use the usual NEXCOM naming convention.

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. vi DNA 1120/1120A User Manual
Preface
Warranty and RMA
NEXCOM Warranty Period
NEXCOM manufactures products that are new or equivalent to new in
accordance with industry standard. NEXCOM warrants that products will
be free from defect in material and workmanship for 2 years, beginning
on the date of invoice by NEXCOM. HCP series products (Blade Server)
which are manufactured by NEXCOM are covered by a three year warranty
period.
NEXCOM Return Merchandise Authorization (RMA)
?Customers shall enclose the “NEXCOM RMA Service Form” with the
returned packages.
?Customers must collect all the information about the problems encoun-
tered and note anything abnormal or, print out any on-screen messages,
and describe the problems on the “NEXCOM RMA Service Form” for
the RMA number apply process.
?Customers can send back the faulty products with or without acces-
sories (manuals, cable, etc.) and any components from the card, such as
CPU and RAM. If the components were suspected as part of the prob-
lems, please note clearly which components are included. Otherwise,
NEXCOM is not responsible for the devices/parts.
?Customers are responsible for the safe packaging of defective products,
making sure it is durable enough to be resistant against further damage
and deterioration during transportation. In case of damages occurred
during transportation, the repair is treated as “Out of Warranty.”
?Any products returned by NEXCOM to other locations besides the cus-
tomers’ site will bear an extra charge and will be billed to the customer.
Repair Service Charges for Out-of-Warranty Products
NEXCOM will charge for out-of-warranty products in two categories, one
is basic diagnostic fee and another is component (product) fee.
System Level
?Component fee: NEXCOM will only charge for main components such
as SMD chip, BGA chip, etc. Passive components will be repaired for
free, ex: resistor, capacitor.
?Items will be replaced with NEXCOM products if the original one cannot
be repaired. Ex: motherboard, power supply, etc.
?Replace with 3rd party products if needed.
?If RMA goods can not be repaired, NEXCOM will return it to the cus-
tomer without any charge.
Board Level
?Component fee: NEXCOM will only charge for main components, such
as SMD chip, BGA chip, etc. Passive components will be repaired for
free, ex: resistors, capacitors.
?If RMA goods can not be repaired, NEXCOM will return it to the cus-
tomer without any charge.

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. vii DNA 1120/1120A User Manual
Preface
Warnings
Read and adhere to all warnings, cautions, and notices in this guide and
the documentation supplied with the chassis, power supply, and accessory
modules. If the instructions for the chassis and power supply are incon-
sistent with these instructions or the instructions for accessory modules,
contact the supplier to find out how you can ensure that your computer
meets safety and regulatory requirements.
Cautions
Electrostatic discharge (ESD) can damage system components. Do the de-
scribed procedures only at an ESD workstation. If no such station is avail-
able, you can provide some ESD protection by wearing an antistatic wrist
strap and attaching it to a metal part of the computer chassis.
Safety Information
Before installing and using the device, note the following precautions:
▪Read all instructions carefully.
▪Do not place the unit on an unstable surface, cart, or stand.
▪Follow all warnings and cautions in this manual.
▪When replacing parts, ensure that your service technician uses parts
specified by the manufacturer.
▪Avoid using the system near water, in direct sunlight, or near a heating
device.
▪The load of the system unit does not solely rely for support from the
rackmounts located on the sides. Firm support from the bottom is highly
necessary in order to provide balance stability.
▪The computer is provided with a battery-powered real-time clock circuit.
There is a danger of explosion if battery is incorrectly replaced. Replace
only with the same or equivalent type recommended by the manufactur-
er. Discard used batteries according to the manufacturer’s instructions.
Installation Recommendations
Ensure you have a stable, clean working environment. Dust and dirt can
get into components and cause a malfunction. Use containers to keep
small components separated.
Adequate lighting and proper tools can prevent you from accidentally
damaging the internal components. Most of the procedures that follow
require only a few simple tools, including the following:
• A Philips screwdriver
• A flat-tipped screwdriver
• A grounding strap
• An anti-static pad
Using your fingers can disconnect most of the connections. It is recom-
mended that you do not use needlenose pliers to disconnect connections
as these can damage the soft metal or plastic parts of the connectors.

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. viii DNA 1120/1120A User Manual
Preface
Safety Precautions
1. Read these safety instructions carefully.
2. Keep this User Manual for later reference.
3. Disconnect this equipment from any AC outlet before cleaning. Use a
damp cloth. Do not use liquid or spray detergents for cleaning.
4. For plug-in equipment, the power outlet socket must be located near
the equipment and must be easily accessible.
5. Keep this equipment away from humidity.
6. Put this equipment on a stable surface during installation. Dropping
it or letting it fall may cause damage.
7. Do not leave this equipment in either an unconditioned environment
or in a above 40oC storage temperature as this may damage the
equipment.
8. The openings on the enclosure are for air convection to protect the
equipment from overheating. DO NOT COVER THE OPENINGS.
9. Make sure the voltage of the power source is correct before connect-
ing the equipment to the power outlet.
10. Place the power cord in a way so that people will not step on it. Do
not place anything on top of the power cord. Use a power cord that
has been approved for use with the product and that it matches the
voltage and current marked on the product’s electrical range label.
The voltage and current rating of the cord must be greater than the
voltage and current rating marked on the product.
11. All cautions and warnings on the equipment should be noted.
12. If the equipment is not used for a long time, disconnect it from the
power source to avoid damage by transient overvoltage.
13. Never pour any liquid into an opening. This may cause fire or electri-
cal shock.
14. Never open the equipment. For safety reasons, the equipment should
be opened only by qualified service personnel.
15. If one of the following situations arises, get the equipment checked
by service personnel:
a. The power cord or plug is damaged.
b. Liquid has penetrated into the equipment.
c. The equipment has been exposed to moisture.
d. The equipment does not work well, or you cannot get it to work
according to the user’s manual.
e. The equipment has been dropped and damaged.
f. The equipment has obvious signs of breakage.
16. Do not place heavy objects on the equipment.
17. The unit uses a three-wire ground cable which is equipped with a
third pin to ground the unit and prevent electric shock. Do not defeat
the purpose of this pin. If your outlet does not support this kind of
plug, contact your electrician to replace your obsolete outlet.
18. CAUTION: DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY
REPLACED. REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE
RECOMMENDED BY THE MANUFACTURER. DISCARD USED BATTER-
IES ACCORDING TO THE MANUFACTURER’S INSTRUCTIONS.
19. The computer is provided with CD drives that comply with the ap-
propriate safety standards including IEC 60825.

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. ix DNA 1120/1120A User Manual
Preface
Technical Support and Assistance
1. For the most updated information of NEXCOM products, visit NEX-
COM’s website at www.nexcom.com.
2. For technical issues that require contacting our technical support team
or sales representative, please have the following information ready
before calling:
– Product name and serial number
– Detailed information of the peripheral devices
– Detailed information of the installed software (operating system,
version, application software, etc.)
– A complete description of the problem
– The exact wordings of the error messages
Warning!
1. Handling the unit: carry the unit with both hands and handle it with
care.
2. Maintenance: to keep the unit clean, use only approved cleaning prod-
ucts or clean with a dry cloth.
3. CompactFlash: Turn off the unit’s power before inserting or removing a
CompactFlash storage card.
Conventions Used in this Manual
Warning: Information about certain situations, which if not
observed, can cause personal injury. This will prevent injury to
yourself when performing a task.
Caution: Information to avoid damaging components or losing
data.
Note: Provides additional information to complete a task easily.
Battery - Safety Measures
Caution
• Risk of explosion if battery is replaced by an incorrect type.
• Dispose of used batteries according to the instructions.
Safety Warning
This equipment is intended for installation in a Restricted Access
Location only.
Note: Remember to reset the date and time upon receiving the
product. You can set them in the AMI BIOS. Refer to chapter 4
for more information.
Resetting the Date and Time

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. x
Preface
DNA 1120/1120A User Manual
Global Service Contact Information
Headquarters
NEXCOM International Co., Ltd.
15F, No. 920, Chung-Cheng Rd.,
ZhongHe District, New Taipei City, 23586,
Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
www.nexcom.com
America
USA
NEXCOM USA
2883 Bayview Drive,
Fremont CA 94538, USA
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.com
Asia
Taiwan
Central Taiwan Office
16F, No.250, Sec. 2, Chongde Rd.,
Beitun Dist., Taichung City 406, R.O.C.
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.com.tw
Japan
NEXCOM Japan
9F, Tamachi Hara Bldg., 4-11-5, Shiba Minato-ku,
Tokyo, 108-0014, Japan
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom-jp.com
China
NEXCOM China
1F & 2F, Block A, No. 16 Yonyou Software Park,
No. 68 Beiqing Road, Haidian District,
Beijing, 100094, China
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.cn
Shanghai Office
Room 603/604, Huiyinmingzun Plaza Bldg., 1,
No.609, Yunlin East Rd.,
Shanghai, 200062, China
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.cn

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. xi
Preface
DNA 1120/1120A User Manual
Europe
Italy
NEXCOM ITALIA S.r.l
Via Gaudenzio Ferrari 29,
21047 Saronno (VA), Italia
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcomitalia.it
United Kingdom
NEXCOM EUROPE
10 Vincent Avenue,
Crownhill Business Centre,
Milton Keynes, Buckinghamshire MK8 0AB,
United Kingdom
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.eu
Shenzhen Office
Room1707, North Block, Pines Bldg.,
No.7 Tairan Rd., Futian Area,
Shenzhen, 518040, China
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.cn
Wuhan Office
1-C1804/ 1805, Mingze Liwan,
No. 519 South Luoshi Rd.,
Hongshan District,
Wuhan, 430070, China
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.cn
Chengdu Office
9F, Shuxiangxie, Xuefu Garden,
No.12 Section 1, South Yihuan Rd.,
Chengdu, 610061, China
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.nexcom.cn

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. xii
Preface
DNA 1120/1120A User Manual
PaCkage Contents
Before continuing, verify that the DNA 1120/1120A package that you received is complete. Your package should have all the items listed in the following
table.
Item P/N Name Description Qty
1 19L00112000X0 DNA1120 ASSY 1
2 50311F0107X00 (H)I HEAD BOLTS SCREW LONG FEI:M3x14 ISO I3x14 AXISx10mm SCREWx4mm(BLACK) 4
3 5044440031X00 RUBBER FOOT KANG YANG:RF20-5-4P 19.8x18x5.0mm 4
4 5060100012X00 HIGH-END DAMPER INSIDE DIA. KITAGAWA:HED-1111-
ALS20ABK
11.1mm H:10.8mm TPS(BLACK) 4
5 6012200052X00 PE ZIPPER BAG #8 170x240mm,W/China RoHS SYMBOL 1
6 6012200053X00 PE ZIPPER BAG #3 100x70mm,W/China RoHS SYMBOL 1
7 6023309081X00 CABLE EDI:232091081804-RS COM PORT. DB9 FEMALE TO RJ45 8P8C L:1800mm 1
8 60233PW187X00 SATA POWER CABLE TC&C:T105048150923-2 SATA 15P MOLDING 90D TO HOUSING 4P
PIT:2.54mm L:60mm
1
9 602DCD0311X00 (N)DNA1120 CD DRIVER VER:1.0 JCL 1
10 7400045001X00 POWER ADAPTER ACE:ADGP45W401-N101A 45W FOR DNA1110 1
11 5043330272X00 TP10 CF BRACKET CHYUAN-JYH:L10Z361 46.4x49.2x8.8mm 301 STAINLESS STEEL T:0.5mm 1
12 60177A0220X00 (N)DNA1120 QUICK REFERENCE GUIDE VER:A KRAMER 1
13 60233ATA44X00 SATA CABLE BEST:118-070-07R SATA 7P 180D TO SATA 7P 180D 26awg SOFT CABLE
L:70mm
1

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. xiii
Preface
DNA 1120/1120A User Manual
ordering information
The following provides ordering information for DNA 1120/1120A.
• Barebone
DNA 1120 (P/N: 10L00112000X0)
- Intel®Atom™ D425 Single Core 1.8GHz processor, 1 DDR3 memory
slot, 4 Gigabit LAN ports with one pair bypass, CompactFlash socket,
1 VGA, 2 USB, 1 Mini-PCI slot, 1 PCI expansion slot
DNA 1120A (P/N: 10L00112001X0)
- Intel®Atom™ D525 Dual Core 1.8GHz processor, 1 DDR3 memory
slot, 4 Gigabit LAN ports with one pair bypass, CompactFlash socket,
1 VGA, 2 USB, 1 Mini-PCI slot, 1 PCI expansion slot

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 1DNA 1120/1120A User Manual
Chapter 1: Product Introduction
ChaPter 1: ProduCt introduCtion
Overview
Key Features
• Desktop Network Platform
• Intel®Atom™ D525 Dual Core / D425 Single Core
1.8GHz processor
• Supports one DDR3 800MHz memory up to 2GB
• 4 GbE LAN ports
• Supports LAN Bypass
Rear
• 2 USB ports
• 1 PCI expansion (32-bit/33 MHz)
• Onboard CompactFlash socket
• 1 internal 2.5” HDD bay
Front

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 2DNA 1120/1120A User Manual
Chapter 1: Product Introduction
Hardware Specifications
Main Board
• DNB 1110
• Intel®Atom™ D525 Dual Core (DNA 1120A) / D425 Single Core (DNA
1120) 1.8GHz processor
• Intel®ICH8M chipset
Main Memory
• 1 x 240-pin DDR3 800MHz SODIMM socket
• Up to 2GB Non-ECC DDR3 SDRAM
LAN Features
• LAN chip: Intel®82583V
• Supports 10/100/1000 link speed
• LAN Bypass: 1 pair
Expansion
• 1 PCI slot
• 1 Mini-PCI slot
I/O Interface - Front
• Power status LED
• HDD status LED
• LAN status LED
I/O Interface - Rear
• 1 power button
• 1 RJ45 type Console port
• 2 USB 2.0 ports
• 4 Copper LAN ports
• 1 PCI expansion slot
Storage
• 1 onboard CompactFlash socket
• 1 internal 2.5” HDD drive bay
Power Input
• This product is intended to be supplied by a Listed Power Adapter rated
+12Vdc, 5A or 3.75A minimum
Dimensions
• Chassis dimensions: 272mm x 195mm x 44mm
• Carton dimensions: 430mm x 300mm x 170mm
Weight
• Without Packing: 2kg
• With Packing: 4kg
Certifications
• CE approval
• FCC Class B
• UL

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 3DNA 1120/1120A User Manual
Chapter 1: Product Introduction
Getting to Know DNA 1120/1120A
Front Panel
Power LED
Indicates the power status of the system.
HDD LED
Indicates the status of the hard drive.
LAN LEDs
Indicates the status of the LAN.
Power LED
HDD LED LAN LEDs

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 4DNA 1120/1120A User Manual
Chapter 1: Product Introduction
Rear Panel
12V DC-in
Power switch
RJ45 type console
LAN port
USB ports
Copper LAN ports
VGA
Expansion slot
VGA Port
Used to connect an analog VGA monitor.
12V DC-in
Used to plug a DC power cord.
Power Switch
Press to power-on or power-off the system.
RJ45 Type Console LAN Port
Used to connect RJ45 type Console port.
USB Ports
Used to connect USB 2.0/1.1 devices.
Copper LAN Ports
Used to connect LAN network devices.
Expansion Slot
Used to install a PCI slot.
- Supports one 32-bit/33MHz PCI card (Max.10W power consumption)

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 5
Chapter 2: Jumpers and Connectors
DNA 1120/1120A User Manual
This chapter describes how to set the jumpers on the motherboard. Note
that the following procedures are generic for DNA 1120/1120A.
Before You Begin
• Ensure you have a stable, clean working environment. Dust and dirt can
get into components and cause a malfunction. Use containers to keep
small components separated.
• Adequate lighting and proper tools can prevent you from accidentally
damaging the internal components. Most of the procedures that follow
require only a few simple tools, including the following:
• A Philips screwdriver
• A flat-tipped screwdriver
• A set of jewelers Screwdrivers
• A grounding strap
• An anti-static pad
• Using your fingers can disconnect most of the connections. It is recom-
mended that you do not use needle-nosed pliers to disconnect connec-
tions as these can damage the soft metal or plastic parts of the connec-
tors.
• Before working on internal components, make sure that the power
is off. Ground yourself before touching any internal components, by
touching a metal object. Static electricity can damage many of the elec-
tronic components. Humid environment tend to have less static electric-
ity than dry environments. A grounding strap is warranted whenever
danger of static electricity exists.
Precautions
Computer components and electronic circuit boards can be damaged by
discharges of static electricity. Working on the computers that are still con-
nected to a power supply can be extremely dangerous.
Follow the guidelines below to avoid damage to your computer or your-
self:
• Always disconnect the unit from the power outlet whenever you are
working inside the case.
• If possible, wear a grounded wrist strap when you are working inside
the computer case. Alternatively, discharge any static electricity by
touching the bare metal chassis of the unit case, or the bare metal body
of any other grounded appliance.
• Hold electronic circuit boards by the edges only. Do not touch the com-
ponents on the board unless it is necessary to do so. Don’t flex or stress
the circuit board.
• Leave all components inside the static-proof packaging that they
shipped with until they are ready for installation.
• Use correct screws and do not over tighten screws.
ChaPter 2: JumPers and ConneCtors

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 6
Chapter 2: Jumpers and Connectors
DNA 1120/1120A User Manual
Jumper Settings
A jumper is the simplest kind of electric switch. It consists of two metal
pins and a cap. When setting the jumpers, ensure that the jumper caps are
placed on the correct pins. When the jumper cap is placed on both pins,
the jumper is short. If you remove the jumper cap, or place the jumper
cap on just one pin, the jumper is open.
Refer to the illustrations below for examples of what the 2-pin and 3-pin
jumpers look like when they are short (on) and open (off).
Two-Pin Jumpers: Open (Left) and Short (Right)
Three-Pin Jumpers: Pins 1 and 2 Are Short

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Chapter 2: Jumpers and Connectors
DNA 1120/1120A User Manual
Locations of the Jumpers and Connectors
DNB 1120
The figure below is the DNB 1120 main board which is the main board used in the DNA 1120/1120A system. It shows the locations of the jumpers and con-
nectors.