Moxa Technologies DA-662A-8 Instructions for use

DA-662A Series Hardware User’s Manual
Edition 2.0, September 2018
www.moxa.com/product
© 2018 Moxa Inc. All rights reserved.

DA-662A Series Hardware User’s Manual
The software described in this manual is furnished under a license agreement and may be used only in accordance with
the terms of that agreement.
Copyright Notice
© 2018 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.
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Table of Contents
1. Introduction...................................................................................................................................... 1-1
Overview ........................................................................................................................................... 1-2
Package Checklist ............................................................................................................................... 1-2
Product Features ................................................................................................................................ 1-2
Hardware Specifications ......................................................................................................................1-3
2. Hardware Introduction...................................................................................................................... 2-1
Appearance........................................................................................................................................2-2
DA-662A-8 .................................................................................................................................2-2
DA-662A-16 ...............................................................................................................................2-2
Dimensions ........................................................................................................................................2-3
Hardware Block Diagram .....................................................................................................................2-3
DA-66A-8 ...................................................................................................................................2-3
DA-662A-16 ...............................................................................................................................2-4
LED Indicators.................................................................................................................................... 2-4
Reset Button ......................................................................................................................................2-4
LCD Screen........................................................................................................................................2-5
Push Buttons......................................................................................................................................2-5
Real-time Clock ..................................................................................................................................2-5
3. Hardware Connection Description ..................................................................................................... 3-1
Placement Options ..............................................................................................................................3-2
Rack Mounting ............................................................................................................................3-2
Connecting the Hardware.....................................................................................................................3-2
Wiring Requirements ................................................................................................................... 3-2
Connecting the Power .................................................................................................................. 3-2
Connecting to the Network ...........................................................................................................3-3
Connecting to a Serial Device .......................................................................................................3-3
Configurable Pull High/Low Resistors for the RS-485 Port .................................................................3-4
Connecting to the Console Port .....................................................................................................3-5
USB Host....................................................................................................................................3-5
CompactFlash .............................................................................................................................3-5

1
1. Introduction
The DA-662A series embedded computers come with 8 to 16 software selectable RS-232/422/485 serial ports,
making them suitable for a variety of industrial applications. Models are available with 4 10/100 Mbps Ethernet
ports. The DA-662A series model also comes with CF and USB ports to make it easy to add additional storage
space. The computers are designed with a standard 19-inch, rugged 1U rackmount case, and are embedded
with a 100-240 VAC power input. This combination of features gives users a robust and reliable ready-to-run
solution for applications such as data acquisition and power substations.
The following topics are covered in this chapter:

Overview

Package Checklist

Product Features

Hardware Specifications

DA-662A Series Hardware Introduction
1-2
Overview
The DA-662A series are RISC-based, ready-to-run embedded computers designed for industrial data
acquisition applications. Each model has 8 or 16 RS-232/422/485 serial ports, and 2 USB hosts based on the
Moxa Macro 500 MHz communication processor. The DA-662A series has 4 Ethernet ports. The casing is a
standard 1U, 19-inch wide rack-mounted rugged enclosure. The robust, rack-mountable mechanism design
provides the hardened protection needed for industrial environment applications, and makes it easy for users
to install the DA-662A series on a standard 19-inch rack. The DA-662A series are ideal for applications that
require a distributed embedded technology, such as SCADA systems, plant floor automation, and power
electricity monitoring applications.
The DA-662A series are suitable for IT control room applications, the critical assets used in the control and
automation system of industrial plant floors, and in electric power utility substations. The DA-662A series can
accept a wide range of power inputs (from 100 to 240V), which means that they can be connected to AC power
lines. Because of the no hard disk, fan-less, energy efficient design, the DA-662A series minimize heat
generation, can operate around the clock, year in and year out, in heavy duty, harsh industrial environments,
delivering the kind of reliable computing power expected of a multifunctional controller.
Choose from models of the DA-662A series that come pre-installed with the open-standard Linux OS. The
built-in SDK makes program development easy by allowing you to follow the common programming
procedures used on a standard PC. All of the software you develop for your own applications can be stored in
the onboard Flash memory. The DA-662A series embedded computers are ideal for creating control systems
with distributed architecture that are based on embedded technologies. Typical applications include SCADA
systems, plant floor automation, and power electricity monitoring.
Package Checklist
Before installing the DA-662A series, verify that the package contains the following items:
•1 DA-662A series embedded computer
•6 jumper caps
•19-inch Rackmount Kit with 2 L-shaped metal plates and 8 screws
•Ethernet Cable: RJ45-to-RJ45 cross-over cable, 100 cm
•CBL-RJ45M9-150: RJ45-to-DB9 male serial port cable, 150 cm
•CBL-RJ45F9-150: RJ45-to-DB9 female console port cable, 150 cm
•Quick installation guide
•Documentation and software CD
•Warranty card
NOTE: Notify your sales representative if any of the above items are missing or damaged.
Product Features
•Moxa Macro 500 MHz Processor
•On-board 128 MB RAM, 32 MB Flash ROM
•8 to 16 RS-232/422/485 serial ports
•4 10/100 Mbps Ethernet
•Standard 19-inch rack-mount installation, 1U height
•Wide range of power input voltages from 100 to 240VAC
•LCD screen and push buttons for Human-Machine Interface (HMI)
•Ready-to-run Linux platform
•Robust, fanless design

DA-662A Series Hardware Introduction
1-3
Hardware Specifications
Computer
CPU:
MoxaMacro 500 MHz
OS:
Embedded Linux (pre-installed)
DRAM:
128 MB onboard
Flash:
32 MB onboard
Ethernet Interface
LAN:
4 auto-sensing 10/100 Mbps ports (RJ45)
Magnetic Isolation Protection:
1.5 kV built-in
Serial Interface
Serial Standards:
8 to 16 RS-232/422/485 ports, software selectable (8-pin RJ45)
ESD Protection:
8 kV contact, 15 kV Air ESD protection for all signals
Surge Protection:
2 kV line-to-line and 4 kV line-to-ground surge protection, 8/20 μs waveform
(DA
-662A-I-8/16-LX only)
Insulation:
500 V (DA-662A-I-8/16-LX only)
Isolation:
2 kV digital isolation (DA-662A-I-8/16-LX only)
Termination Resistor:
120 ohm, jumper selectable
Console Port:
RS-232 (all signals), RJ45 connector
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
(DA
-662A-I-8/16-LX only: TxD, RxD, RTS, CTS, GND)
RS
-422: TxD+, TxD-, RxD+, RxD-, GND
RS
-485-4w: TxD+, TxD-, RxD+, RxD-, GND
RS
-485-2w: Data+, Data-, GND
LEDs
System:
OS Ready
LAN:
10/100M x 4
Serial: TxD, RxD (8 to 16 of each)
Mini Screen with
Push Buttons
LCD Panel:
Liquid Crystal Display on the case, 2 x 16 text mode
Push Buttons:
Four membrane buttons for convenient on-site configuration
Physical Characteristics
Housing:
SECC sheet metal (1 mm)
Weight: 4.3 kg
Dimensions:
Without
ears: 440 x 45 x 237 mm (17.32 x 1.77 x 9.33 in)
With ears: 480 x 45 x 237 mm (18.90 x 1.77 x 9.33 in)
Mounting:
Standard 19-inch rackmount
Environmental Limits
Operating Temperature:
-10 to 60°C (14 to 140°F)
Storage Temperature:
-20 to 70°C (-4 to 158°F)
Ambient Relative Humidity:
5 to 95% (non-condensing)
Anti
-Vibration: 1 g @ IEC-68-2-6, sine wave (resonance search), 5-
500 Hz, 1 Oct/min, 1 Cycle, 13 mins 17
sec per axis

DA-662A Series Hardware Introduction
1-4
Power Requirements
Input Voltage:
100 to 240 VAC auto ranging
(47 to 63
Hz for AC input)
Power Consumption:
20 W
Standards and Certifications
Safety:
UL 60950-1
EMC:
EN 55022/24
CISPR 22, FCC Part 15B Class A
IEC 61000
-4-2 ESD: Contact 8 kV; Air 15 kV
IEC 61000
-4-3 RS: 3 V/m (80 MHz to 1 GHz)
IEC 61000
-4-4 EFT: Power 1 kV; Signal 0.5 kV
IEC 61000
-4-5 Surge: Power 2 kV; Signal 4 kV
IEC 61000
-4-6 CS: 3 V
IEC 61000
-4-8
IEC 61000
-4-11
Green Product: RoHS, CRoHS, WEEE
Reliability
Alert Tools:
Built-in buzzer and RTC (real-time clock)
Automatic Reboot Trigger:
Built-in WDT (watchdog timer)
MTBF (mean time between failures):
125,733 hrs
Warranty
Warranty Period: 5 years
Details:
See www.moxa.com/warranty

2
2. Hardware Introduction
DA-662A series hardware is compact, well-designed, and built rugged for industrial applications. LED indicators
help you monitor the performance and identify trouble spots. Multiple ports allow the connection of different
devices for wireless operation. With the reliable and stable hardware platform that is provided, you may devote
your attention to the development of your application. In this chapter, learn the basics about the embedded
computer hardware and its different parts.
The following topics are covered in this chapter:

Appearance
DA-662A-8
DA-662A-16

Dimensions

Hardware Block Diagram
DA-66A-8
DA-662A-16

LED Indicators

Reset Button

LCD Screen

Push Buttons

Real-time Clock

DA-662A Series Hardware Hardware Introduction
2-2
Appearance
DA-662A-8
Front View
Rear View
DA-662A-16
Front View
Rear View

DA-662A Series Hardware Hardware Introduction
2-3
Dimensions
Hardware Block Diagram
The following block diagrams show the layout of the DA-662A series’ internal components.
DA-66A-8

DA-662A Series Hardware Hardware Introduction
2-4
DA-662A-16
LED Indicators
LED indicators are located on the front panel of the DA-662A series.
LED Name LED Color LED Function
Ready Red Power is On, and system is ready (after booting up)
LAN1, LAN2,
LAN3, LAN4
Orange 10 Mbps Ethernet connection
Green 100 Mbps Ethernet connection
P1-P16 (Rx) Orange Serial port is receiving RX data from the serial device
Off Serial port is not receiving RX data from the serial device
P1-P16 (Tx) Green Serial port is transmitting TX data to the serial device
Off Serial port is transmitting TX data to the serial device
Reset Button
Press the Reset button on the front panel continuously for at least 5 seconds to load the factory default
configuration. After the factory default configuration has been loaded, the system will reboot automatically.
The Ready LED will blink on and off for the first 5 seconds, and then maintain a steady glow once the system
has rebooted.
We recommend that you only use this function if the software is not working properly and you want to load
factory default settings. To reset an embedded Linux system, always use the software reboot command
/>reboot to protect the integrity of data being transmitted or processed. The Reset button is not designed to
hard reboot the DA-662A series.
ATTENTION
Pressing the Reset button will only load the configuration file. All files in the /etc directory will revert to their
factory defaults, and
all user data in the Flash ROM will be deleted.

DA-662A Series Hardware Hardware Introduction
2-5
LCD Screen
The DA-662A series has an LCD screen on the front panel. The LCD screen can display 16 columns and 2 rows
of text. After the DA-662A series boots up, the LCD screen will display the model name and firmware version:
D A - 6 6 2 A - 1 6
V E R . 1 . 0
Push Buttons
There are four push buttons on the DA-662A series’ front panel. The buttons are used to enter text onto the
LCD screen. The buttons are MENU, (up cursor), (down cursor), and SEL:
Button Action
MENU Displays the main menu.
Scrolls up through a list of items shown on the LCD screen’s second line.
Scrolls down through a list of items shown on the LCD screen’s second line.
SEL Selects the option listed on the LCD screen.
Real-time Clock
The DA-662A series’ real time clock is powered by a lithium battery. We strongly recommend that you do not
replace the lithium battery without help from a qualified Moxa support engineer. If you need to change the
battery, contact the Moxa RMA service team.
WARNING
There is a risk of explosion if the battery is replaced by an incorrect
type.

3
3. Hardware Connection Description
The following topics are covered in this chapter:

Placement Options
Rack Mounting

Connecting the Hardware
Wiring Requirements
Connecting the Power
Connecting to the Network
Connecting to a Serial Device
Configurable Pull High/Low Resistors for the RS-485 Port
Connecting to the Console Port
USB Host
CompactFlash

DA-662A Series Hardware Hardware Connection Description
3-2
Placement Options
Rack Mounting
The DA-662A series is designed to be mounted on a standard 19-inch rack. Two L-shaped metal plates are
included as standard accessories with the DA-662A series. Use the enclosed pair of L-shaped metal plates and
screws to fasten your DA-662A series to the rack cabinet. Two placement options are available. You can either
lock the front or the rear panel of the DA-662A series to the front of the rack. Each L-shaped plate has 6 holes,
leaving two outer or inner holes open for your convenience.
Connecting the Hardware
This section describes how to connect the DA-662A series to serial devices. The topics covered in this section
are: Wiring Requirements, Connecting the Power, Connecting to the Network, Connecting to a
Serial Device, and Connecting to the Console Port.
Wiring Requirements
ATTENTION
Safety First!
Be sure to disconnect the power cord before instal
ling and/or wiring your DA-662A series.
Wiring Caution
!
Calculate the maximum possible current in each power wire an
d 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 DA-662A series. When plugged in, the DA-662A series’ internal components
generate heat, and consequently the outer casing may feel hot to the touch.
You should observe the following common wiring rules:
•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.
NOTE: 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.
•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.
•Where necessary, it is strongly advised that you label wiring to all devices in the system.
Connecting the Power
To power on the DA-662A series, use a power cord to connect the power line to the DA-662A series’ AC power
connector. The power connector is located on the right side of the rear panel. Next, turn on the power switch.
The DA-662A series takes about 30 seconds to boot up. Once the device is ready, the Ready LED on the front
panel will light up, and the DA-662A series model name and firmware version will appear on the LCD screen.

DA-662A Series Hardware Hardware Connection Description
3-3
Connecting to the Network
For DA-662A series, connect one end of the Ethernet cable to one of the DA-662A series’ 10/100M Ethernet
ports (8-pin RJ45) and the other end of the cable to the Ethernet network. If the cable is properly connected,
the DA-662A series will indicate a valid connection to the Ethernet in the following ways:
Pin Signal
1 ETx+
2 ETx-
3 ERx+
4 –
5 –
6 ERx-
7 –
8 –
Connecting to a Serial Device
Use properly wired serial cables to connect the DA-662A series to serial devices. The DA-662A series’ serial
ports (P1 to P16) use 8-pin RJ45 connectors. The ports can be configured by software for RS-232, RS-422, or
2-wire RS-485. The pin assignments are shown in the following table:
Pin RS-232 RS-232
(DA-662A-I-8/16-LX only) RS-422 RS-485
1 DSR – – –
2 RTS RTS TXD+ –
3 GND GND GND GND
4 TXD TXD TXD- –
5
RXD
RXD
RXD+
Data+
6 DCD – RXD- Data-
7 CTS CTS – –
8 DTR – – –

DA-662A Series Hardware Hardware Connection Description
3-4
Configurable Pull High/Low Resistors for the RS-485 Port
In some critical environments, you may need to add termination resistors to prevent the reflection of serial
signals. When using termination resistors, it is important to set the pull high/low resistors correctly so that the
electrical signal is not corrupted. The DA-662A series uses jumper settings to set the termination resistors and
pull high/low resistor values for each serial port.
To configure the termination or pull high/low resistors, you first need to open the DA-662A's chassis. You will
see 3 rows of jumper caps (as shown in the accompanying figure). The first row is for setting pull high resistors,
the second row is for setting termination resistors, and the third row is for setting pull low resistors.
Each serial port has 6 jumper caps for configuring the resistors. The pin assignments are shown in the following
table:
Jumper setting
RS485 Data + RS485 Data -
Pull High resistors
1-2: 150 kΩ
2-3: 1 kΩ
Termination
1-2: Open
2-3: 120 Ω
Pull Low resistors
1-2: 150 kΩ
2-3: 1 kΩ
To set the termination resistors to 120 Ω, make sure that PIN 2 and PIN 3 assigned to the serial port are shorted
by jumper caps.
To set the pull high/low resistors to 150 kΩ, make sure that PIN 1 and PIN 2 assigned to the serial port are
shorted by jumper caps. This is the default setting.
To set the pull high/low resistors to 1 kΩ, make sure that PIN 2 and PIN 3 assigned to the serial port are shorted
by jumper caps.

DA-662A Series Hardware Hardware Connection Description
3-5
ATTENTION
Do not use the 1 KΩ setting on the DA
-662A series when using the RS-
232 interface. Doing so will degrade the
RS
-232 signals, shorten the maximum allowed communication distance, and the Rx LED may light up.
Connecting to the Console Port
The DA-662A series’ console port is an 8-pin RJ45 RS-232 port. The pin definition is the same as for the serial
ports (P1 to P16).
USB Host
The DA-662A series offers 2 USB 2.0 hosts, allowing you to connect with a USB storage device. The first USB
mass storage device to be connected will be mounted automatically by mount to /mnt/sdc, and the second
device will be mounted automatically to /mnt/sdd. The DA-662A series will be un-mounted automatically with
the umount command when the device is disconnected.
CompactFlash
The DA-662A series have a built-in CompactFlash socket. The CompactFlash socket allows users to add
additional memory by inserting a CompactFlash memory card, without any risk to the computer.
Follow the instructions below to insert a CompactFlash card:
1. Turn off DA-662A.
2. Insert the CompactFlash card into the socket.
3. Turn on DA-662A.
ATTENTION
The DA
-
662A series do not support CompactFlash hot swap and PnP (Plug and Play) function. It is necessary to
remove Turn
off DA-662A first before inserting or removing the CompactFlash card.