Supero A1SA2-2750F User manual

A1SA2-2750F
A1SA2-2550F
USER’S MANUAL
Revision 1.0

The information in this user’s manual has been carefully reviewed and is believed to be accurate.
The vendor assumes no responsibility for any inaccuracies that may be contained in this document,
and makes no commitment to update or to keep current the information in this manual, or to notify
any person or organization of the updates. Please Note: For the most up-to-date version of this
manual, please see our website at www.supermicro.com.
Super Micro Computer, Inc. ("Supermicro") reserves the right to make changes to the product
described in this manual at any time and without notice. This product, including software and docu-
mentation, is the property of Supermicro and/or its licensors, and is supplied only under a license.
Any use or reproduction of this product is not allowed, except as expressly permitted by the terms
of said license.
IN NO EVENT WILL SUPER MICRO COMPUTER, INC. BE LIABLE FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, SPECULATIVE OR CONSEQUENTIAL DAMAGES ARISING FROM THE
USE OR INABILITY TO USE THIS PRODUCT OR DOCUMENTATION, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES. IN PARTICULAR, SUPER MICRO COMPUTER, INC.
SHALL NOT HAVE LIABILITY FOR ANY HARDWARE, SOFTWARE, OR DATA STORED OR USED
WITH THE PRODUCT, INCLUDING THE COSTS OF REPAIRING, REPLACING, INTEGRATING,
INSTALLING OR RECOVERING SUCH HARDWARE, SOFTWARE, OR DATA.
Any disputes arising between the manufacturer and the customer shall be governed by the laws of
Santa Clara County in the State of California, USA. The State of California, County of Santa Clara
shall be the exclusive venue for the resolution of any such disputes. Supermicro's total liability for
all claims will not exceed the price paid for the hardware product.
FCC Statement: This equipment has been tested and found to comply with the limits for a Class
A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the manufacturer’s instruction manual, may cause harmful
interference with radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference, in which case you will be required to correct the interference at your
own expense.
California Best Management Practices Regulations for Perchlorate Materials: This Perchlorate
warning applies only to products containing CR (Manganese Dioxide) Lithium coin cells. “Perchlorate
Material-special handling may apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate”.
WARNING: Handling of lead solder materials used in this
product may expose you to lead, a chemical known to
the State of California to cause birth defects and other
reproductive harm.
Manual Revision 1.0
Release Date: April 23, 2014
Unless you request and receive written permission from Super Micro Computer, Inc., you may not
copy any part of this document.
Information in this document is subject to change without notice. Other products and companies
referred to herein are trademarks or registered trademarks of their respective companies or mark
holders.
Copyright © 2014 by Super Micro Computer, Inc.
All rights reserved.
Printed in the United States of America

iii
Preface
This manual is written for system integrators, IT professionals, and
knowledgeable end-users. It provides information for the installation and use of the
A1SA2-2750/2550F motherboard.
About This Motherboard
The A1SA2-2750/2550F motherboard supports a next-generation Intel®
S2xxx SoC (System-on-a-Chip) processor in a BGA1283 package. With a S2xxx
Series processor built in, the A1SA2-2750/2550F motherboard supports cutting-
edge technology such as Intel's Virtualization Technology, Turbo Boost Technology,
offering unprecedented enhancements to data integrity, internet security, network
communication, system performance, and power efciency and scalability. This
motherboard is optimized for network applications, web hosting, storage/server
applications, and micro-cloud computing. It is ideal for communications systems,
embedded solutions, or server or storage platforms. Please refer to our website at
(http://www.supermicro.com/products/) for processor and memory support updates.
This product is intended to be installed and serviced by professional technicians.
Manual Organization
Chapter 1 describes the features, specications and performance of the mother-
board, and provides detailed information on the Intel S2xxx Series processor.
Chapter 2 provides hardware installation instructions. Read this chapter when in-
stalling the processor, memory modules and other hardware components into the
system. If you encounter any problems, see Chapter 3, which describes trouble-
shooting procedures for video, memory and system setup stored in the CMOS.
Chapter 4 includes an introduction to the BIOS, and provides detailed information
on running the CMOS Setup utility.
Appendix A provides BIOS Error Beep Codes.
Appendix B lists software program installation instructions.
Appendix C contains UEFI BIOS Recovery instructions.
Preface

iv
Conventions Used in the Manual:
Special attention should be given to the following symbols for proper installation and
to prevent damage done to the components or injury to yourself:
Warning: Critical information to prevent damage to the components or injury to your-
self.
Important: Important information given to ensure proper system installa-
tion or to relay safety precautions.
Note: Additional Information given to differentiate various models or to
provide instructions for correct system setup.
A1SA2-2750/2550F Motherboard User’s Manual

v
Contacting Supermicro
Contacting Supermicro
Headquarters
Address: Super Micro Computer, Inc.
980 Rock Ave.
San Jose, CA 95131 U.S.A.
Tel: [phone]
Fax: [phone]
Email: [email protected] (General Information)
[email protected] (Technical Support)
Web Site: www.supermicro.com
Europe
Address: Super Micro Computer B.V.
Het Sterrenbeeld 28, 5215 ML
's-Hertogenbosch, The Netherlands
Tel: [phone]
Fax: [phone]
Email: [email protected] (General Information)
[email protected] (Technical Support)
[email protected] (Customer Support)
Web Site: www.supermicro.com
Asia-Pacic
Address: Super Micro Computer, Inc.
3F, No. 150, Jian 1st Rd.
Zhonghe Dist., New Taipei City 235
Taiwan (R.O.C)
Tel: [phone]
Fax: [phone]
Email: [email protected]
Web Site: www.supermicro.com.tw

vi
Table of Contents
Preface
Chapter 1 Introduction
1-1 Overview ......................................................................................................... 1-1
1-2 Processor Overview ....................................................................................... 1-9
1-3 Special Features ........................................................................................... 1-10
1-4 PC Health Monitoring.................................................................................... 1-10
1-5 ACPI Features................................................................................................1-11
1-6 Power Supply .................................................................................................1-11
Chapter 2 Installation
2-1 Standardized Warning Statements ................................................................. 2-1
Battery Handling.............................................................................................. 2-1
Product Disposal ............................................................................................. 2-3
2-2 Static-Sensitive Devices.................................................................................. 2-4
Precautions ..................................................................................................... 2-4
Unpacking ....................................................................................................... 2-4
2-3 Memory Support.............................................................................................. 2-5
Memory Population Guidelines ....................................................................... 2-5
Populating Memory Modules........................................................................... 2-6
Installing DIMM Memory Modules................................................................... 2-6
Removing Memory Modules ........................................................................... 2-7
2-4 Motherboard Installation.................................................................................. 2-8
Tools Needed .................................................................................................. 2-8
Location of Mounting Holes ............................................................................ 2-8
Installing the Motherboard .............................................................................. 2-9
2-5 Connectors/IO Ports...................................................................................... 2-10
Backplane I/O Panel ..................................................................................... 2-10
Ethernet Ports ...........................................................................................2-11
Universal Serial Bus (USB)...................................................................... 2-12
Port 80 Header......................................................................................... 2-12
Keyboard/VGA/Mouse.............................................................................. 2-13
2-7 Jumper Settings ............................................................................................ 2-14
Explanation of Jumpers ................................................................................ 2-14
LAN Ports Enable/Disable........................................................................ 2-14
CMOS Clear ............................................................................................. 2-15
VGA Enable.............................................................................................. 2-16
Watch Dog Timer Enable ......................................................................... 2-16
A1SA2-2750/2550F Motherboard User’s Manual

vii
2-8 Onboard Indicators........................................................................................ 2-17
Overheat/PWR Fail/Fan Fail LED ............................................................ 2-17
BMC Heartbeat LED ............................................................................... 2-17
Unit Identication LED.............................................................................. 2-18
Onboard Power LED ................................................................................ 2-19
2-9 SATA Connections......................................................................................... 2-20
Serial ATA Ports........................................................................................ 2-20
Chapter 3 Troubleshooting
3-1 Troubleshooting Procedures ........................................................................... 3-1
Before Power On ............................................................................................ 3-1
No Power ........................................................................................................ 3-1
No Video ......................................................................................................... 3-1
Memory Errors ............................................................................................... 3-2
Losing the System’s Setup Conguration....................................................... 3-2
3-2 Technical Support Procedures ........................................................................ 3-3
3-3 Frequently Asked Questions ........................................................................... 3-4
3-4 Battery Removal and Installation .................................................................... 3-5
Battery Removal.............................................................................................. 3-5
Proper Battery Disposal .................................................................................. 3-5
Battery Installation........................................................................................... 3-5
3-5 Returning Merchandise for Service................................................................. 3-6
Chapter 4 BIOS
4-1 Introduction...................................................................................................... 4-1
4-2 Main Setup ...................................................................................................... 4-2
4-3 Advanced Setup Congurations...................................................................... 4-4
4-4 IPMI Conguration ........................................................................................ 4-18
4-4 Event Logs .................................................................................................... 4-20
4-5 Security Settings ........................................................................................... 4-22
4-6 Boot Settings................................................................................................. 4-25
4-7 Save & Exit ................................................................................................... 4-27
Appendix A BIOS Error Beep Codes
A-1 BIOS Error Beep Codes .................................................................................A-1
Appendix B Software Installation Instructions
B-1 Installing Software Programs ..........................................................................B-1
B-2 Installing SuperDoctor5...................................................................................B-2
Appendix C UEFI BIOS Recovery Instructions
C-1 An Overview to the UEFI BIOS ......................................................................C-1
Table of Contents

viii
C-2 How to Recover the UEFI BIOS Image (-the Main BIOS Block)....................C-1
C-3 To Recover the Main BIOS Block Using a USB-Attached Device..................C-1
Appendix D Dual Boot Block
D-1 Introduction......................................................................................................D-1
D-2 Steps to Reboot the System by Using Jumper JBR1 ....................................D-2
A1SA2-2750/2550F Motherboard User’s Manual

Chapter 1: Introduction
1-1
Chapter 1
Introduction
1-1 Overview
Checklist
Congratulations on purchasing your computer motherboard from an acknowledged
leader in the industry. Supermicro boards are designed with the utmost attention to
detail to provide you with the highest standards in quality and performance.
Please check that the following items have all been included with your motherboard.
If anything listed here is damaged or missing, contact your retailer.
The following items are included in the retail box:
•One (1) Supermicro Motherboard
•One (1) Quick Reference Guide
Note: For your system to work properly, please follow the links below to
download all necessary drivers/utilities and the user's manual for your
motherboard.
Supermicro product manuals: http://www.supermicro.com/support/manuals/
Product Drivers and utilities: ftp://ftp.supermicro.com/
If you have any questions, please contact our support team at support@supermicro.
com.

1-2
A1SA2-2750/2550F User’s Manual
A1SA2-2750/2550F Motherboard Image
Note: All graphics shown in this manual were based upon the latest PCB Revision
available at the time of publishing of the manual. The motherboard you've received
may or may not look exactly the same as the graphics shown in this manual.

Chapter 1: Introduction
1-3
A1SA2-2750/2550F Motherboard Layout
Important Notes to the User
1. See Chapter 2 for detailed information on jumpers, I/O ports and JF1 front
panel connections.
2. " " indicates the location of "Pin 1". Jumpers not indicated are for testing
only.
3. This motherboard supports Turbo Boost Technology, offering turbo-boost
capabilities to maximize system performance for server platforms.
4. In 24-node Micro Cloud systems, the IPMI feature cannot synchronize the
FAN mode in all nodes.
BIOS
LICENSE
BIOS
LICENSE
DESIGNED IN USA
A1SA2-2550F
REV:1.01
BAR CODE
BAR CODE
BAR CODE
1
1
1
A
C
CPU2 IPMI
CPU1 IPMI
MAC CODE MAC CODE
AST2400
B1
J8
JBT2
SW2
JP2
JP1
JPG2 JPG1
JPL1
JPL2 JWD2
JWD1
J4
J10
LED2
LED1
LED7 (Top Side)
J20
JKVM1
J38
BIOS
AST2400
88E1543
Firmware
J37
LED8 (Bottom Side)
QL1183
QL1183
Firmware
1
P2 LAN 2/1
Up:
CPU2
P2-DIMMB1 P2-DIMMA2 P2-DIMMA1 P2-DIMMB2
PLED2
PLED1
Down: P1 LAN 2/1
SW
NODE
USB0/1
VBAT
IPMI_LAN
UID
PWR
P1-DIMMB2 P1-DIMMB1
P1-DIMMA2
P1-DIMMA1
CPU1
JBT1
BIOS

1-4
A1SA2-2750/2550F User’s Manual
A1SA2-2750/2550F Motherboard Quick Reference
BIOS
LICENSE
BIOS
LICENSE
DESIGNED IN USA
A1SA2-2550F
REV:1.01
BAR CODE
BAR CODE
BAR CODE
1
1
1
A
C
CPU2 IPMI
CPU1 IPMI
MAC CODE MAC CODE
AST2400
B1
J8
JBT2
SW2
JP2
JP1
JPG2 JPG1
JPL1
JPL2 JWD2
JWD1
J4
J10
LED2
LED1
LED7 (Top Side)
J20
JKVM1
J38
BIOS
AST2400
88E1543
Firmware
J37
LED8 (Bottom Side)
QL1183
QL1183
Firmware
1
P2 LAN 2/1
Up:
CPU2
P2-DIMMB1 P2-DIMMA2 P2-DIMMA1 P2-DIMMB2
PLED2
PLED1
Down: P1 LAN 2/1
SW
NODE
USB0/1
VBAT
IPMI_LAN
UID
PWR
P1-DIMMB2 P1-DIMMB1
P1-DIMMA2
P1-DIMMA1
CPU1
JBT1
BIOS

Chapter 1: Introduction
1-5
Connector Description
Battery Onboard Battery (JBAT1)
J20 HDD Backplane Slot for SATA 3.0 6Gb/s (4 connections) and power
supply
J37 Port 80 connector for Node 1 (P1-PORT80)
J38 Port 80 connector for Node 2 (P2-PORT80)
JKVM1 USB 2.0 (x2)/VGA (Monitor)/COM (UART) connector for front I/O support
for remote console redirection or network interface.
IPMI_LAN IPMI Dedicated LAN for Node 1 and Node 2
P1-LAN1/LAN2 Gigabit LAN Ethernet (RJ45) Ports 1/2 for Node 1
P2-LAN1/LAN2 Gigabit LAN Ethernet (RJ45) Ports 1/2 for Node 2
PWR Power switch for Node 1 and Node 2
SW2 Node switch between Node 1 and Node 2
USB 2.0 Front Panel USB 2.0 (See JKVM1)
A1SA2-2750/2550F Motherboard Connectors/Jumpers/LEDs
Jumper Description Default
JBT1/JBT2 CMOS Clear for Node 1 (JBT1) and Node 2 (JBT2) Off (Normal)
JPG1/JPG2 VGA Enable for Node 1 (JPG1) and Node 2 (JPG2) Pins 1-2 (Enabled)
JPL1/JPL2 Ethernet LAN Ports Enable for Node 1 (JPL1) and Node 2
(JPL2)
Pins 1-2 (Enabled)
JWD1/JWD2 Watch Dog Enable for Node 1 (JWD1) and Node 2 (JWD2) Pins 1-2 (Reset)
LED Description Color/State Status
LED1 BMC Heartbeat LED for Node 1 Green: Blinking BMC: Normal
LED2 BMC Heartbeat LED for Node 2 Green: Blinking BMC: Normal
LED7 (UID) Unit Identier LED Blue: On Blue: Unit Identied
LED8 Overheat/PWR Fail/ Fan Fail LED Red: Solid on
Blinking
On: Overheat
Blinking: PWR Fail or Fan Fail
PLED1 Power LED for Node 1 Green: On
Orange: Standby
Node 1 PWR On/Standby
PLED2 Power LED for Node 2 Green: On
Orange: Standby
Node 2 PWR On/Standby

1-6
A1SA2-2750/2550F User’s Manual
Motherboard Features
CPU Single Intel®S2xxx Tri-Gate 22nm SoC in the BGA1283
1283 package
Each SoC supports 4 or 8 cores
Memory Supports up to 64GB of DDR3 ECC VLP UDIMM
1600MHz in eight memory slots.
Dual-Channel memory or Single-Channel w/x8 data width,
Single or Dual Rank memory
DIMM sizes
DIMMs 2 GB, 4GB, 8GB, and 16GB
Network Connections S2xxx Series SoC I354 built-in Quad-port GbE controllers
(MACs) w/Marvell 88E1543 Transceiver
Four (4) RJ-45 rear I/O panel connectors with Link and
Activity LEDs
One (1) IPMI LAN Connector (Realtek 8211E-PHY)
I/O Devices SATA Connections
SATA 3.0 (6Gb/s) Four (4) SATA 3.0 (I-SATA 0/1)
RAID 0, 1
USB Devices
Two (2) USB 2.0 on the rear I/O panel (USB 0/1)
Serial (COM) Ports
One (1) COM Port on the rear I/O panel (COM1)
One (1) front accessible Serial port header (COM2)
IPMI 2.0
IPMI 2.0 supported by Aspeed AST2400 BMC (Base-
board Management Controller)
VGA (Graphics Display)
One (1) VGA Port on the rear I/O panel supported by the
Aspeed AST2400 VGA Controller
BIOS 128 Mb AMI BIOS®SPI EEPROM BIOS
Plug and Play, DMI 2.0, PCI 2.2, ACPI 5.0, USB Key-
board, SMBIOS 2.7, and UEFI 2.3.1
Power Conguration ACPI/ACPM Power Management
Main Switch Override Mechanism
Power-on mode for AC power recovery
PC Health Monitoring Onboard Voltage Monitoring
+3.3V, +5V,+12V, VBAT, VDIMM, VCORE for CPU

Chapter 1: Introduction
1-7
CPU 1+1-phase switching voltage regulator
CPU/System overheat LED and control
CPU Thermal Trip support
SoC Thermal Control Circuit (TCC) mechanism
Thermal Monitor Support
Fan Control
Low noise fan speed control
BMC Health Monitoring
BMC Fan control and thermal alert by sensors monitor-
ing, including CPU, memory and motherboard ambient
temperatures
System Management PECI (Platform Environment Conguration Interface) 3.0
System resource alert via SuperDoctor®5
SuperDoctor®5, Watch Dog, NMI
Chassis Intrusion header and detection
CD Utilities Download from www.supermicro.com
Operating Temperature 00-600C
Dimensions Propprietary form factor 12.75" x 4.7"
(323.85mm x 119.38mm)
Note: Please refer to Note 3 and Note 4 on page 1-3 for Intel Quickassist
technology and Turbo Boost technology support.

1-8
A1SA2-2750/2550F User’s Manual
System Block Diagram
Note: This is a general block diagram and may not exactly represent
the features on your motherboard. See the Motherboard Features
pages for the actual specications of each motherboard.
A1SA2-2750/2550F motherboard Block Diagram
FLASH 64Mbit
SPI
CHACHA
DIMMB1DIMMB2
DIMMA1DIMMA2
LPC
LPC
AVOTON SOC
PEG [0]
AST2400
PCIE x 1
COM2
TX/RX
(debug)
0Ohm
NI
FLASH 64Mbit
VGA1
SPI
COM1
LPC
AST2400
TX/RX
(debug)
PCIE x 1
0Ohm
NI
COM/USB/VGA SWITCH
KVM CONNECTER
(VGA+USBx2+COM)
VGAVGA
VGA2
USB [0:1]
USB [2:3]
USB [0:1]
USB [2:3]
LAN SWITCH
RTL8363SB-CG
USBx2 USBx2
SATA 3.0SATA 3.0
CHACHA
VLP DDR3
SGMII
DIMMB1
DIMMB2
SGMII
DIMMA1
DIMMA2
MDI SRGMII
REAR
LAN
VLP DDR3
VLP DDR3
VLP DDR3
VLP DDR3 VLP DDR3
VLP DDR3 VLP DDR3
SGMII x 4
88E1543SGMII x 4
88E1543
LPC
AVOTON SOC
PEG [0]
RTL8211E
SGMII
CPU1CPU2
SATA 3.0
SATA 3.0 SATA 3.0 SATA 3.0
SATA GEN3
SATA GEN3
Pericom
6812
SATA
re-driver
Pericom
6812
SATA
re-driver
HDD Backplane
LAN1 LAN2
REAR REAR
CHB CHB
UART1
UART2
CHB CHB
REAR REAR
LAN3 LAN4
UART1
UART2

Chapter 1: Introduction
1-9
1-2 Processor Overview
The A1SA2-2750/2550F motherboard supports a 2nd-generation 64-bit, Intel®
Atom™ S2xxx Tri-Gate SoC (System-on-a-Chip) processor based on low-power Sil-
vermont microarchitecture in a BGA 1283 package. Built upon the functionality and
capability of the S2xxx Series processor in the low-power 22nm microarchitecture,
the A1SA2-2750/2550F motherboard provides unprecedented enhancements to
network routing, internet security, system performance, and power efciency.
The S2xxx SoC Series processor features an Out-of-Order Execution Engine and
offers new multi-core and system fabric architecture capable of utilizing eight CPU
cores to achieve improved single-thread performance. This new SoC processor
also provides an operating range with wider dynamic power and enhanced power
management. In addition, the A1SA2-2750/2550F motherboard supports the Intel®
Turbo Boost Technology, which offers turbo-boost capabilities to maximize system
performance.
Intel S2xxx Series Processor Features
The S2xxx Series processor offers the following features:
•SSE Extensions
•AES-NI
•Highly-Optimized Power Management Unit
•Server-Class Reliability, Availability and Serviceability (RAS)
•Intel®Virtualization Technology (VTx)
•Intel®Turbo Boost Technology
Note: Please refer to Note 3 and Note 4 on Page 1-3 for Intel®Quickassist
technology and Turbo Boost technology support.

1-10
A1SA2-2750/2550F User’s Manual
1-3 Special Features
Recovery from AC Power Loss
Basic I/O System (BIOS) provides a setting for you to determine how the system will
respond when AC power is lost and then restored to the system. You can choose
for the system to remain powered off, (in which case you must press the power
switch to turn it back on), or for it to automatically return to a power-on state. See
the Advanced BIOS Setup section to change this setting. The default setting is
Last State.
1-4 PC Health Monitoring
This section describes the PC health monitoring features of the board. All have
an onboard System Hardware Monitoring chip that supports PC health monitoring.
An onboard voltage monitor will scan these onboard voltages continuously: CPU
Vcore, VTT_CPU, VDIMM, 12V, 5V, 3.3V, 3.3V Standby, and Battery voltages.
Once a voltage becomes unstable, a warning is given, or an error message is sent
to the screen. The user can adjust the voltage thresholds to dene the sensitivity
of the voltage monitor.
Environmental Temperature Control
This motherboard came with a passive heatsink built_in. Please follow the instruc-
tions given in your system design guide or your system user manual to provide
proper/adequate airow to your system. The onbaord BaseBoard Management
Controller (BMC) monitors CPU, memory and motherboard environment tempera-
tures for fan control and PC health management.
Note: To avoid possible system overheating, please be sure to provide
adequate airow to your system.
System Resource Alert
This feature is available when the system is used with SuperDoctor®5 in the
Windows OS environment or used with SuperDoctor II in Linux. SuperDoctor
is used to notify the user of certain system events. For example, you can also
congure SuperDoctor to provide you with warnings when the system temperature,
CPU temperatures, voltages and fan speeds go beyond predened thresholds.

Chapter 1: Introduction
1-11
1-5 ACPI Features
ACPI stands for Advanced Conguration and Power Interface. The ACPI specica-
tion denes a exible and abstract hardware interface that provides a standard
way to integrate power management features throughout a PC system, including
its hardware, operating system and application software. This enables the system
to automatically turn on and off peripherals such as CD-ROMs, network cards, hard
disk drives and printers.
In addition to enabling operating system-directed power management, ACPI also
provides a generic system event mechanism for Plug and Play, and an operating
system-independent interface for conguration control. ACPI leverages the Plug and
Play BIOS data structures, while providing a processor architecture-independent
implementation that is compatible with Windows 7, Windows 8, and Windows 2008
Operating Systems.
1-6 Power Supply
As with all computer products, a stable power source is necessary for proper and
reliable operation. It is even more important for processors that have high CPU
clock rates.
It is strongly recommended that you use a high quality power supply that meets ATX
power supply Specication 2.02 or above. It must also be SSI compliant. (For more
information, please refer to the web site at http://www.ssiforum.org/). Additionally, in
areas where noisy power transmission is present, you may choose to install a line lter
to shield the computer from noise. It is recommended that you also install a power
surge protector to help avoid problems caused by power surges.

1-12
A1SA2-2750/2550F User’s Manual
Notes