Moxa Technologies DA-681 Series User manual

DA-681 Series Embedded Computer User’s
Manual
Seventh Edition, August 2011
www.moxa.com/product
© 2011 Moxa Inc. All rights reserved.

DA-681 Series Embedded Computer 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
© 2011 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
Moxa Americas
Toll
-free: 1-888-669-2872
Tel:
[phone]
Fax:
[phone]
Moxa China (Shanghai office)
Toll
-free: 800-820-5036
Tel:
[phone]
Fax:
[phone]
Moxa Europe
Tel:
[phone]
Fax:
[phone]
Moxa Asia
-Pacific
Tel:
[phone]
Fax:
[phone]

Table of Contents
1. Introduction...................................................................................................................................... 1-1
Overview...........................................................................................................................................1-2
Model Descriptions and Package Checklist..............................................................................................1-2
Appearance........................................................................................................................................1-3
Dimensions........................................................................................................................................1-4
Features............................................................................................................................................1-4
Hardware Block Diagram .....................................................................................................................1-5
DA-681 Basic System ..................................................................................................................1-5
Hardware Specifications ......................................................................................................................1-5
Non-standard Baudrates......................................................................................................................1-7
2. Hardware Installation ....................................................................................................................... 2-1
Placement Options..............................................................................................................................2-2
Desktop .....................................................................................................................................2-2
Rack mounting............................................................................................................................2-2
Wiring Requirements...........................................................................................................................2-4
Connecting the Power .........................................................................................................................2-4
Wiring the Power Inputs ......................................................................................................................2-5
For SP Models.............................................................................................................................2-5
For DP Models.............................................................................................................................2-6
For DPP-T Models ........................................................................................................................2-7
Power Input Wiring Description ............................................................................................................2-8
HIPOT (Dielectric Strength) Testing ......................................................................................................2-9
Reset Button....................................................................................................................................2-10
Front Panel LED................................................................................................................................2-10
Connecting to a Display.....................................................................................................................2-11
Connecting a PS/2 Keyboard and Mouse..............................................................................................2-11
Connecting USB Devices....................................................................................................................2-12
LAN Ports ........................................................................................................................................2-12
Upgrading the Memory Module...........................................................................................................2-13
Installing a CompactFlash Card ..........................................................................................................2-15
Installing a SATA Hard Disk ...............................................................................................................2-16
3. BIOS Setup........................................................................................................................................ 3-1
Entering the BIOS Setup Utility ............................................................................................................3-2
Modifying the BIOS Main Settings .........................................................................................................3-2
Basic Configuration......................................................................................................................3-2
System Security..........................................................................................................................3-3
Advanced Settings..............................................................................................................................3-4
Hard Disk Boot Priority.................................................................................................................3-4
First/Second/Third Boot Device..............................................................................................3-4
Boot Other Devices ..............................................................................................................3-4
Advanced BIOS Features..............................................................................................................3-5
CPU Features..............................................................................................................................3-5
Virus Warning......................................................................................................................3-5
CPU L1 & L2 Cache...............................................................................................................3-5
Quick Power on Self Test ......................................................................................................3-5
Boot Up NumLock Status ......................................................................................................3-5
Typematic Rate Setting.........................................................................................................3-6
Typematic Rate (Chars/Sec)..................................................................................................3-6
Typematic Delay (milliseconds)..............................................................................................3-6
APIC Mode ..........................................................................................................................3-6
MPS Version Control for OS...................................................................................................3-6
OS Select for DRAM > 64 MB.................................................................................................3-6
Execute Disable Bit ..............................................................................................................3-7
Advanced Chipset Settings ...........................................................................................................3-7
System BIOS Cacheable .......................................................................................................3-7
Video BIOS Cacheable ..........................................................................................................3-7
Memory Hole at 15M-16M .....................................................................................................3-7
On-Chip Frame Buffer Size....................................................................................................3-7
DVMT Mode.........................................................................................................................3-8
DVMT/FIXED Memory Size ....................................................................................................3-8
PnP/PCI Configurations ................................................................................................................3-8
Init Display First ..................................................................................................................3-8
Resources Controlled By .......................................................................................................3-8
IRQ Resources.....................................................................................................................3-8
PCI/VGA Palette Snoop.........................................................................................................3-9
PCI Latency Timer (CLK).......................................................................................................3-9
Frequency/Voltage Control ...........................................................................................................3-9
Spread Spectrum.................................................................................................................3-9

Peripherals ........................................................................................................................................3-9
OnChip IDE Device ....................................................................................................................3-10
IDE HDD Block Mode..........................................................................................................3-10
On-Chip Channel 0/1 PCI IDE..............................................................................................3-10
IDE Channel 0/1 Master/Slave PIO.......................................................................................3-10
IDE Channel 0/1 Master/Slave UDMA ...................................................................................3-10
Onboard Device ........................................................................................................................3-11
USB Controller...................................................................................................................3-11
USB 2.0 Controller .............................................................................................................3-11
USB Keyboard Support .......................................................................................................3-11
Onboard LAN Boot ROM......................................................................................................3-11
Onboard I/O Chip Setup.............................................................................................................3-12
Debug Port........................................................................................................................3-12
PWRON after PWR-Fail........................................................................................................3-12
Power .............................................................................................................................................3-13
Soft-Off by PWR-BTTN ...............................................................................................................3-13
Wake Up Control.......................................................................................................................3-13
Lan Wake up .....................................................................................................................3-13
RTC Wake Up ....................................................................................................................3-13
Date (of Month) Alarm........................................................................................................3-13
Time (hh: mm: ss) Alarm ...................................................................................................3-14
Hardware Monitor.............................................................................................................................3-14
CPU Warning Temperature .........................................................................................................3-14
Warning Beep ...........................................................................................................................3-14
Load Defaults...................................................................................................................................3-15
Load System Default Settings .....................................................................................................3-15
Load System Turbo Settings .......................................................................................................3-15
Load CMOS from BIOS...............................................................................................................3-15
Save CMOS to BIOS ..................................................................................................................3-15
Exiting the BIOS Setup......................................................................................................................3-16
Save & Exit Setup .....................................................................................................................3-16
Exit Without Saving ...................................................................................................................3-16
Upgrading the BIOS..........................................................................................................................3-17
A. Safety Installation Instructions ........................................................................................................A-1
A. RTC Battery Warning.......................................................................................................................A-1
B. Fuse Warning .................................................................................................................................A-1
C. Rackmount Warning........................................................................................................................A-1
B. Regulatory Statement Approval ........................................................................................................ B-1

1
1. Introduction
Thank you for purchasing the Moxa DA-681 series x86-based industrial ready-to-run embedded computer.
This manual introduces the hardware installation, connector interfaces and BIOS setup of the DA-681. 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

Appearance

Dimensions

Features

Hardware Block Diagram
DA-681 Basic System

Hardware Specifications

Non-standard Baudrates

DA-681 Series Embedded Computer Introduction
1-2
Overview
The DA-681 computer is based on the Intel x86 processor and supports VGA, 6 Ethernet ports, 4 RS-232 and
8 RS-485 serial ports with isolation, CompactFlash, and USB. The DA-681 comes in a standard 19-inch, 1U high
form factor, making it an ideal platform for industrial applications.
With its robust design, the DA-681 is suitable for industrial automation applications that require standard
19-inch rackmount solutions, such as power automation, transportation, and oil and gas. Another plus is that
the serial ports come with 2 KV digital galvanic isolation protection to guarantee communication reliability in
harsh industrial environments.
Moreover, the DPP-T models are in full compliance with IEC 61850-3 standards to meet the demands of power
substation automation.
The DA-681 runs Linux, WinCE 6.0, or Windows XP Embedded (pre-installed), providing a friendly environment
for developing sophisticated application software. The great software support that Moxa provides makes the
programmer’s job easier, and helps programmers develop bug-free code quickly and at a lower cost.
Model Descriptions and Package Checklist
The DA-681 Series includes the following models:
DA-681-I-SP-CE:
x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485, CompactFlash, SATA, USB,
Single Power, WinCE 6.0
DA-681-I-SP-XPE:
x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485, CompactFlash, SATA, USB,
Single Power, WinXPe SP2
DA-681-I-SP-LX:
x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485, CompactFlash, SATA, USB,
Single Power, Linux 2.6
DA-681-I-DP-CE:
x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485, CompactFlash, SATA, USB,
Dual Power, WinCE 6.0
DA-681-I-DP-XPE:
x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485, CompactFlash, SATA, USB,
Dual Power, WinXPe SP2
DA-681-I-DP-LX:
x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485, CompactFlash, SATA, USB,
Dual Power, Linux 2.6
DA-681-I-DPP-T-CE:
IEC 61850-3 certified x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485,
CompactFlash, SATA, USB, Dual Power, WinCE 6.0
DA-681-I-DPP-T-XPE:
IEC 61850-3 certified x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485,
CompactFlash, SATA, USB, Dual Power, WinXPe SP2
DA-681-I-DPP-T-LX:
IEC 61850-3 certified x86 Ready-to-Run Rackmount Computer with VGA, 6 Ethernet, 4 RS-232, 8 RS-485,
CompactFlash, SATA, USB, Dual Power, Linux 2.6

DA-681 Series Embedded Computer Introduction
1-3
Each model is shipped with following standard items:
•1 DA-681 Embedded Computer
•Quick Installation Guide
•Documentation & Software CD
•Ethernet Cable: RJ45 to RJ45 cross-over cable, 100 cm
•Product Warranty Statement
Appearance
Front View
Rear View

DA-681 Series Embedded Computer Introduction
1-4
Dimensions
Features
The DA-681 Basic System has the following features:
•IEC 61850-3 certified for power substation automation systems (DPP-T models only)
•Intel Celeron M 1 GHz processor with 400 MHz FSB
•1 x 200-pin DDR2 SODIMM socket, supporting DDR2 400 up to 1GB (512 Mb built-in)
•Six 10/100 Mbps Ethernet ports
•1 CompactFlash socket, 1 IDE and serial ATA-150 connectors for storage expansion
•USB 2.0 ports for high speed peripherals
•4 isolated RS-232 and 8 isolated RS-485 ports
•Serial port speed from 50 to 921.6 Kbps, supporting nonstandard baudrates
•Specific design for heat dissipation
•Embedded Linux, WinCE 6.0, or WinXPe platform
•19-inch Rackmount model, 1U high
•Wide temperature models available (DPP-T models only)
•100-240 VAC/VDC power input (Dual Power models offer power redundancy function)
•Fan-less design
ATTENTION
R
efer to the “Non-standard Baudrates” section for instructions on how to calculate which baudrates are
supported
.

DA-681 Series Embedded Computer Introduction
1-5
Hardware Block Diagram
DA-681 Basic System
Hardware Specifications
Computer
CPU:
Intel Celeron M 1 GHz processor
OS (pre
-installed): WinCE 6.0, Windows XP Embedded SP3, Linux 2.6
System Chipset:
Intel 910GMLE + ICH6M chipset
BIOS:
4 mega-bit Flash BIOS, PCI Plug & Play, ACPI function support
FSB:
400 MHz
System Memory:
1 x 200-pin DDR2 SODIMM socket supporting DDR2 400; up to 1 GB max. (512 MB built-
in)
Expansion Bus:
PCI/104 onboard
USB:
USB 2.0 compliant hosts x 2, Type A connector, supports system boot up
Storage
Built
-in: 1 GB (2 GB for DA-681-XPE) industrial DOM onboard to store OS via IDE interface
Storage Expansion:
CompactFlash socket
HDD Support:
SATA connector for HDD expansion
Other Peripherals
KB/MS:
1 PS/2 interface, supports standard PS/2 keyboard and PS/2 mouse
Display
Graphics Controller:
Integrated graphics with built-in Intel 910GME, and built-in Intel extreme Graphics 2
technology
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

DA-681 Series Embedded Computer Introduction
1-6
Ethernet Interface
LAN:
6 auto-sensing 10/100 Mbps ports (RJ45)
Magnetic Isolation Protection:
1.5 KV built-in
Serial Interface
Serial Standards:
• 4 RS
-232 ports (DB9 male)
• 8 RS
-485 ports (terminal block)
ESD Protection:
15 KV for all signals
Isolation:
2 KV digital galvanic isolation (DA-681-I-DPP-T only)
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, ADDC® (automatic data direction control) for RS-485
Baudrate:
50 bps to 921.6 Kbps (supports non-standard baudrates; see user's manual for details)
Serial Signals
RS
-232: TxD, RxD, DTR, DSR, RTS, CTS, DCD, GND
RS
-485-2w: Data+, Data-, GND
LEDs
System:
Power x 1, Storage x 1
LAN:
10M x 6, 100M x 6
Serial:
RS
-232: 4 x Tx, 4 x Rx
RS
-485: 8 x Tx, 8 x Rx
Power Failure:
LED x 2 (dual power models)
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 and DP models:
-10 to 60°C (14 to 140°F)
DPP
-T models: -40 to 75°C (-40 to 167°F)
Storage Temperature:
SP and DP models:
-20 to 80°C (4 to 176°F)
DPP
-T models: -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
608
70-2-2/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:
26 W
Standards and Certifications
Safety:
UL 60950-1, CSA C22.2 No. 60950-1-03, EN 60950-1, CCC (GB4943, GB9254, GB17625.1)
EMC:
EN 55022, EN 61000-3-2, EN 61000-3-3, EN 55024, FCC Part 15 Subpart B Class A
Power Automation:
IEC 61850-3 (DPP-T models only)
Green Product:
RoHS, CRoHS, WEEE

DA-681 Series Embedded Computer Introduction
1-7
Reliability
Alert Tools:
Built-in buzzer and RTC (real-time clock) with battery lithium backup
Automatic Reboot Trigger:
Built-in WDT (watchdog timer) supporting 1-255 level time interval system
reset, software programmable
MTBF (mean time between failures):
100,847 hrs
Warranty
Warranty Period:
3 years
Details:
See www.moxa.com/warranty
Non-standard Baudrates
Moxa’s UART ASIC, supports most non-standard baudrates in the range 50 bps to 921.6 Kbps. In fact,
supported baudrates are much denser towards the lower values. For example, no baudrates are supported
between the integers 5320 and 5323, but 49 baudrates are supported between the integers 387 and 388. Of
course this is the way it should be, since serial devices that require using non-standard baudrates generally use
slower baudrates.
Before using a serial device that requires using a non-standard baudrate, you must first check that the DA-681
supports a baudrate within the tolerance specified by the serial device manufacturer.
Use the following formula to calculate which baudrates are supported by the DA-283:
(A) Baudrate = 921600/(N+M/8) bps, for N = 1, 2, …, 18431, M = 0, 1, 2, …, 7
or
(B) Baudrate = 8 x 921600/K bps, for K = 8, 9, …, 147456
If you are a programmer and you need to write a driver for your serial device, then you may need to use
formula A. If you have a serial device that requires using a non-standard baudrate, then you can use formula
B to determine if the DA-681 supports a baudrate within the tolerance specified by the serial device
manufacturer.
Example: Your serial device requires using a baudrate of 5340 bps and has a tolerance of 2 bps. Can the
DA-681 be used with this device?
Solution: Set formula B to the desired baudrate and then solve for K.
8 x 912600/K = 5338 ==> K = 1367.703259…
This shows that the supported baudrate closest to 5340 comes from setting K=1367 or K=1368.
K=1368 ==> Baudrate1 = 5336.842105...
K=1367 ==> Baudrate2 = 5340.746159…
Since 5338 – Baudrate1 < 2, we can see that the DA-681 supports the serial device.
Note that we can use formula A to generate the so-called “standard” baudrates, which come from setting M=0,
and setting N equal to certain integers.
Standard Baudrates
Baudrate N M Baudrate N M
921600 1 0 4800 192 0
460800 2 0 2400 384 0
230400 4 0 1800 512 0
115200 8 0 1200 768 0
57600 16 0 600 1536 0
38400 24 0 300 3072 0
19200 48 0 150 6144 0
9600 96 0 75 12288 0
7200 128 0 50 18432 0

DA-681 Series Embedded Computer Introduction
1-8
WARNING
C
ommunication between a serial device and a Moxa UART port may not work correctly if the serial device use
s
a baudrate that
it not within the correct tolerance of a baudrate calculated from either formula A or formula B
.

2
2. Hardware Installation
The DA-681 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-681 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-681 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 DP Models
For DPP-T Models

Power Input Wiring Description

HIPOT (Dielectric Strength) Testing

Reset Button

Front Panel LED

Connecting to a Display

Connecting a PS/2 Keyboard and Mouse

Connecting USB Devices

LAN Ports

Upgrading the Memory Module

Installing a CompactFlash Card

Installing a SATA Hard Disk

DA-681 Series Embedded Computer Hardware Installation
2-2
Placement Options
Desktop
Place your DA-681 on a clean, flat, well-ventilated desktop. For better ventilation, leave some space between
the DA-681 and other equipment. Do not place equipment or objects on top of the DA-681, as this might
damage the computer’s internal components.
Rack mounting
The DA-681 has rackmount supports for installing the embedded computer on a standard rack.
ATTENTIONS
For maximum safety, a
t least two persons should work together to lift, place, and attach the embedded
computer to
the rack.
Before you lift or move the embedded computer, make sure that the embedded computer
is turned off
and the
power to the
rack system is turned off.
Four rackmount screws are required to attach the DA-681 to a standard rack.
Follow these steps to install the DA-681 on a rack.
Step 1: Installing the rackmount supports.
Take the rackmount supports out of the packages. There are two rackmount ears and 12 screws. Each ear
requires 6 screws to attach to the rack.

DA-681 Series Embedded Computer Hardware Installation
2-3
Step 2: Installing the rackmount ears to the DA-681.
Use 6 screws to attach one rackmount ear to one side of the DA-681. Repeat this procedure for the ear on the
other side of the DA-681.
Step 3: Installing the DA-681 to a rack.
Gently slide the DA-681 onto the rack, and then use screws provided by the rack supplier to fix the rackmount
support to the rail.
Note that four screws are required to attach the DA-681 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.

DA-681 Series Embedded Computer Hardware Installation
2-4
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.
ATTENTION
Safety First!
Be sure to disconnect the power cord before install
ing 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-681 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 models (SP), use Power 1 only;
for dual power models (DP and DPP-T), use both Power 1 and Power 2 for power input installation. Refer to the
following figure for detailed information.

DA-681 Series Embedded Computer Hardware Installation
2-5
Wiring the Power Inputs
For SP Models

DA-681 Series Embedded Computer Hardware Installation
2-6
For DP Models

DA-681 Series Embedded Computer Hardware Installation
2-7
For DPP-T Models

DA-681 Series Embedded Computer Hardware Installation
2-8
Power Input Wiring Description
Read the following section for a detailed 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 PWR1 Surge Ground PWR1 Surge Ground is connected to the Chassis
Ground via a jumper on the terminal block. Surge
Ground is used as the ground conductor for all
surge and transient suppression circuitry. NOTE:
Surge Ground must be disconnected from Chassis
Ground during HIPOT (dielectric strength) testing.
4 Chassis Ground Chassis Ground is connected to the Safety
Ground terminal for AC inputs, or the equipment
ground bus for DC inputs. Chassis ground connects
to both power supply surge grounds via a
removable jumper.
5 NC No function
6 NC No function
7 Chassis Ground Chassis Ground is connected to the Safety
Ground terminal for AC inputs or the equipment
ground bus for DC inputs. Chassis ground connects
to both power supply surge grounds via a
removable jumper.
8 PWR2 Surge Ground PWR2 Surge Ground is connected to the Chassis
Ground via a jumper on the terminal block. Surge
Ground is used as the ground conductor for all
surge and transient suppression circuitry. NOTE:
Surge Ground must be disconnected from Chassis
Ground during HIPOT (dielectric strength) testing.
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.