Moxa Technologies IA3341 Instructions for use

IA3341 Hardware User’s Manual
First Edition, May 2010
www.moxa.com/product
© 2010 Moxa Inc. All rights reserved.
Reproduction without permission is prohibited.

IA3341 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
Copyright ©2010 Moxa Inc.
All rights reserved.
Reproduction without permission is prohibited.
Trademarks
The MOXA logo is a registered trademark of Moxa Inc.
All other trademarks or registered marks in this manual belong to their respective manufacturers.
Disclaimer
Information in this document is subject to change without notice and does not represent a commitment on the part of
Moxa.
Moxa provides this document as is, without warranty of any kind, either expressed or implied, including, but not limited
to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the
products and/or the programs described in this manual, at any time.
Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for
its use, or for any infringements on the rights of third parties that may result from its use.
This product might include unintentional technical or typographical errors. Changes are periodically made to the
information herein to correct such errors, and these changes are incorporated into new editions of the publication.
Technical Support Contact Information
www.moxa.com/support
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Toll-free: 1-888-669-2872
Tel: [phone]
Fax: [phone]
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Toll-free: 800-820-5036
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Moxa Asia-Pacific
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Table of Contents
1. Introduction...................................................................................................................................... 1-1
Overview ...........................................................................................................................................1-2
Model Descriptions and Package Checklist..............................................................................................1-2
Product Features ................................................................................................................................1-2
Product Hardware Specifications ...........................................................................................................1-3
Hardware Block Diagram .....................................................................................................................1-5
2. Hardware Introduction ..................................................................................................................... 2-1
Appearance........................................................................................................................................2-2
LED Indicators....................................................................................................................................2-3
Reset to Default Button .......................................................................................................................2-3
Real Time Clock..................................................................................................................................2-4
Placement Options ..............................................................................................................................2-4
DIN-Rail Mounting .......................................................................................................................2-4
Wall or Cabinet Mounting .............................................................................................................2-5
3. Hardware Connection Description ..................................................................................................... 3-1
Wiring Requirements...........................................................................................................................3-2
Connecting the Power ..................................................................................................................3-2
Grounding the Unit ......................................................................................................................3-2
Connecting to the Console Port.............................................................................................................3-3
Connecting to the Network...................................................................................................................3-3
Connecting to a Serial Device ...............................................................................................................3-4
Connecting to the DI/DO .....................................................................................................................3-4
Digital Input Wiring .....................................................................................................................3-4
Digital Output Wiring ...................................................................................................................3-5
Connecting to the AI and Thermocouples ...............................................................................................3-5
Inserting the SD Card .........................................................................................................................3-5
USB Hosts .........................................................................................................................................3-6
A. Regulatory Approval Statements....................................................................................................... A-1

1
1. Introduction
Thank you for purchasing the Moxa IA3341 RISC-based industrial ready-to-run embedded computer. The
IA3341 is based on the MOXA ART ARM9 industrial processor, and features 2 RS-232/422/485 serial ports, dual
LANs, 4 digital input channels, and 4 digital output channels. In addition, the IA3341 computer has 2 analog
input channels and 2 thermocouple channels, making it the ideal solution for a variety of industrial applications,
such as solar power and environmental monitoring. This manual introduces the IA3341’s hardware. After a
brief introduction of the hardware features, the manual focuses on installation and configuration.
The following topics are covered in this chapter:
Overview
Model Descriptions and Package Checklist
Product Features
Product Hardware Specifications
Hardware Block Diagram

IA3341 Hardware User's Manual Introduction
1-2
Overview
The IA3341 is based on the MOXA ART ARM9 industrial processor, and features 2 RS-232/422/485 serial ports,
dual LANs, 4 digital input channels, and 4 digital output channels. In addition, the IA3341 computer has 2
analog input channels and 2 thermocouple channels, making it the ideal solution for a variety of industrial
applications.
By supporting multiple interfaces, the IA3341 can connect to different types of devices, making it particularly
well-suited for solar power applications. Meters, sensors, and other devices can all connect easily to the IA3341,
and with its powerful computing platform, the IA3341 can be used as a front-end controller to perform
industrial tasks, such as data acquisition, data computing, protocol conversion, and data analysis.
The industrial-grade design of the IA3341 provides a robust, reliable computer that can fit any industrial
environment, and the open source Linux platform gives programmers a convenient tool for developing
sophisticated, bug-free application software at a lower cost.
In addition, the built-in Modbus TCP library and web server help users easily monitor and retrieve the AI data,
which is particularly useful for applications, such as solar power and environmental monitoring.
Model Descriptions and Package Checklist
IA3341-LX
RISC-based embedded computer with 2 serial ports, 4 DIs, 4 DOs, 2 AIs, 2 thermocouples, dual LANs, SD,
Linux
The IA3341 is shipped with the following items:
•IA3341-LX embedded computer
•Wall mounting kit
•Ethernet cable: RJ45 to RJ45 cross-over cable, 100 cm
•CBL-4PINDB9F-100: 4-pin pin header to DB9 female console port cable, 100 cm
•Terminal block to power jack converter
•Document and Software CD or DVD
•Quick Installation Guide (printed)
•Product Warranty Statement (printed)
NOTE: Notify your sales representative if any of the above items are missing or damaged.
Product Features
•Moxa ART 32-bit ARM 9 Industrial Processor
•64MB RAM, 16 MB Flash onboard
•2 software selectable 2 RS-232/422/485 serial ports
•50 bps to 921.6 Kbps serial speed, supporting non-standard baudrates
•4 DIs and 4 DOs with 3KV digital isolation protection
•2 AIs and 2 thermocouple inputs; sensor types J,K,T,E,R,S,B,N
•Dual 10/100 Mbps Ethernet for network redundancy
•SD socket for storage expansion
•USB 2.0 host
•Supports Modbus TCP library to retrieve AI and thermocouple data
•Ready-to-run Linux Kernel 2.6 Platform
•DIN-Rail and wall mount installation
•Robust, fanless design

IA3341 Hardware User's Manual Introduction
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Product Hardware Specifications
Computer
CPU: MOXA ART ARM9 32-bit RISC CPU, 192 MHz
OS (pre-installed): Embedded Linux
DRAM: 64 MB onboard
Flash: 16 MB onboard
USB: USB 2.0 host x 1 (type A connector)
Storage
Storage Expansion: SD slot
Ethernet Interface
LAN: 2 auto-sensing 10/100 Mbps ports (RJ45)
Magnetic Isolation Protection: 1.5 KV built-in
Serial Interface
Serial Standards: 2 RS-232/422/485 ports, software-selectable (DB9 male)
ESD Protection: 15 KV for all signals
Console Port: RS-232 (TxD, RxD, GND), 4-pin header output (115200, n, 8, 1)
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-422: TxD+, TxD-, RxD+, RxD-, GND
RS-485-4w: TxD+, TxD-, RxD+, RxD-, GND
RS-485-2w: Data+, Data-, GND
Digital Input
Input Channels: 4, source type
Input Voltage: 0 to 30 VDC
Digital Input Levels for Dry Contacts:
• Logic level 0: Close to GND
• Logic level 1: Open
Digital Input Levels for Wet Contacts:
• Logic level 0: +2 V max.
• Logic level 1: +4 V to +30 V
Connector Type: 10-pin screw terminal block (4 points, COM, GND)
Isolation: 3 KV digital isolation
Digital Output
Output Channels: 4, sink type, keeps output status after hot system reset
Output Range: 5 to 30 VDC at open collector to 30 V
Max. Load: 30 mA
Power Dissipation: 300 mW
Connector Type: 10-pin screw terminal block (4 points, GND)
Isolation: 3 KV digital isolation
Analog Input
Input Channels: 2
Resolution: 16 bits
I/O Mode: Voltage/Current
Input Range: 0-10 V, 4-20 mA

IA3341 Hardware User's Manual Introduction
1-4
Accuracy:
• ±0.1% FSR @ 25°C
• ±0.3% FSR @ 10°C and 60°C
Sampling Rate: 12 samples/sec
Input Impedance: 200K ohms
Thermocouple Input
Input Channels: 2
Sensor Types: J, K, T, E, R, S, B, N
Sampling Rate: 12 samples/sec
Resolution: 16 bits
Accuracy:
• ±0.1% FSR @ 25°C
• ±0.3% FSR @ 10°C and 60°C
Input Impedance: 1M ohms
LEDs
System: Power, Ready, Storage
LAN: 10M/Link x 2, 100M/Link x 2 (on connector)
Serial: TxD x 2, RxD x 2
Reset Button: Supports "Reset to Factory Default"
Physical Characteristics
Housing: SECC sheet metal (1 mm)
Weight: 585 g
Dimensions: 116 x 35 x 146 mm (2.95 x 1.38 x 3.71 in)
Mounting: DIN-Rail, wall
Environmental Limits
Operating Temperature: -10 to 60°C (14 to 140°F)
Operating Humidity: 5 to 95% RH
Storage Temperature: -20 to 80°C (-4 to 176°F)
Anti-vibration: 2 g rms @ IEC 60068-2-34, random wave, 5-500 Hz, 1 hr per axis
Anti-shock: 20 g @ IEC 60068-2-27, half sine wave, 11 ms
Power Requirements
Input Voltage: 12 to 48 VDC (3-pin terminal block, V+, V-, SG)
Power Consumption:
5 W (with no load on the USB port)
‧106 mA @ 48 VDC
‧191 mA @ 24 VDC
‧351 mA @ 12 VDC
8.5 W (with load on the USB port)
‧176 mA @ 48 VDC
‧330 mA @ 24 VDC
‧661 mA @ 12 VDC
Regulatory Approvals
EMC: FCC, CE (Class A)
Safety: UL/cUL, CCC, LVD
Reliability
Alert Tools: Built-in buzzer and RTC (real-time clock)
Automatic Reboot Trigger: Built-in WDT (watchdog timer)
Warranty
Warranty Period: 5 years
Details: See www.moxa.com/warranty

IA3341 Hardware User's Manual Introduction
1-5
Hardware Block Diagram

2
2. Hardware Introduction
The IA3341 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 the multiple
ports can be used to connect a variety of devices. The IA3341 comes with a reliable and stable hardware
platform that lets you devote the bulk of your time to application development. In this chapter, we provide
basic information about the embedded computer’s hardware and its various components.
The following topics are covered in this chapter:
Appearance
LED Indicators
Reset to Default Button
Real Time Clock
Placement Options
DIN-Rail Mounting
Wall or Cabinet Mounting

IA3341 Hardware User's Manual Hardware Introduction
2-2
Appearance
Front View
10/100 Mbps
LAN Port x2
(RJ45)
USB 2.0 Host x1
(type A)
Serial LED x 4
(Tx, Rx)
DI x 4
DO x 4
System LED x 3
(Power, Ready, Storage)
Top & Bottom Views
Serial Port x2
(RS-232/422/485, DB9)
Console Port
AI x 2
Thermocouple
Input x 2
Power Input
SD Socket
Reset to Default
Button

IA3341 Hardware User's Manual Hardware Introduction
2-3
Dimensions
116
16
146
35
20 78
118
LED Indicators
The IA3341 has 11 LED indicators on the front panel. Refer to the following table for information about each
LED.
LED Name Color Meaning
Green Power is ON.Power
Off No power is being received, or power error exists.
Green OS is ready and functioning normally (after booting up).Ready
Off OS is not ready.
Green Data is being written to or read from the storage unit.Storage
Off Storage unit is idle.
Orange 10 Mbps Ethernet connectionLAN1, LAN2
Green 100 Mbps Ethernet connection
Green Serial port is transmitting TX data to the serial device.P1-P2 (TX)
Off Serial port is not transmitting TX data to the serial device.
Orange Serial port is receiving RX data from the serial device.P1-P2 (RX)
Off Serial port is not receiving RX data from the serial device.
Reset to Default Button
Press and hold the Reset Button 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. The Reset to Default functionality is not designed to hard reboot the IA3341.

IA3341 Hardware User's Manual Hardware Introduction
2-4
ATTENTION
Reset to Default preserves user’s data
The Reset to Default function will NOT format the user directory and erase the user’s data. Using the Reset
to default function will only load the configuration file. The rest of the user’s data stored in the Flash ROM will
remain intact.
Real Time Clock
The IA3341’s 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.
Placement Options
DIN-Rail Mounting
The aluminum DIN-Rail attachment plate is already attached to the product’s casing. To attach the IA3341 to
a DIN-Rail, make sure that the stiff metal spring is facing the top of the IA3341, as shown in the following
figures.
STEP 1: Insert the top of the DIN-Rail into the
slot just below the stiff metal spring.
STEP 2: The DIN-Rail attachment unit will snap
into place as shown.
metal
spring
DIN-Rail
metal
spring
DIN-Rail
To remove the IA3341 from the DIN-Rail, simply reverse Steps 1 and 2.

IA3341 Hardware User's Manual Hardware Introduction
2-5
Wall or Cabinet Mounting
The IA3341 comes with two metal plates for attaching it to a wall or the inside of a cabinet.
STEP 1: Remove the aluminum DIN-Rail
attachment plate from IA3341’s rear panel, and
then attach the wall mount plates, as shown in
the figures below.
STEP 2: Mounting the IA3341 on the wall
requires 4 screws, as illustrated in the
following figure:
Screws
Screws
NOTE Before tightening the screws into the wall, make sure the screw head and shank size are suitable by inserting
the screw into one of the keyhole-shaped apertures of the wall mounting plates.

3
3. Hardware Connection Description
This section describes how to connect the IA3341 to a network and various devices for first time testing
purposes.
The following topics are covered in this chapter:
Wiring Requirements
Connecting the Power
Grounding the Unit
Connecting to the Console Port
Connecting to the Network
Connecting to a Serial Device
Connecting to the DI/DO
Digital Input Wiring
Digital Output Wiring
Connecting to the AI and Thermocouples
Inserting the SD Card
USB Hosts

IA3341 Hardware User's Manual Hardware Connection Description
3-2
Wiring Requirements
In this section, we describe how to connect various devices to the embedded computer. You should heed the
following common safety precautions before proceeding with the installation of 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.
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.
•When necessary, it is strongly advised that you label wiring to all devices in the system.
ATTENTION
Safety First!
Be sure to disconnect the power cord before doing installations and/or wiring.
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 IA3341 has a 3-pin terminal block for a 12 to 48 VDC power input.
The following figures show how the power input interface connects to external power sources. If the power is
properly supplied, the Power LED will light up. The Ready LED will glow a solid green color when the operating
system is ready (it may take 30 to 60 seconds for the operating system to boot up).
Terminal Block
12-48 VDC
Power Input
ATTENTION
The power for this product is intended to be supplied by a Listed Power Supply Unit that is rated to deliver 12
to 48 VDC at a minimum of 1200 mA for 12 VDC, and 260 mA for 48 VDC.
Grounding the Unit
Grounding and wire routing helps limit the effects of noise due to electromagnetic interference (EMI). Run the
ground connection from the ground screw to the grounding surface prior to connecting devices.

IA3341 Hardware User's Manual Hardware Connection Description
3-3
ATTENTION
This product is intended to be mounted to a well-grounded mounting surface, such as a metal panel.
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IA3341 Hardware User's Manual Hardware Connection Description
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Connecting to a Serial Device
Use properly wired serial cables to connect the IA3341 to serial devices. The serial ports of the IA3341 use male
DB9 connectors. The ports can be configured by software for RS-232, RS-422, or 2-wire RS-485. The precise
pin assignments are shown in the following table:
Male DB9 Port RS-232/422/485 Pinouts
12345
6789
Pin RS-232 RS-422 RS-485 (4-wire) RS-485 (2-wire)
1 DCD TxDA(-) TxDA(-) –
2 RxD TxDB(+) TxDB(+) –
3 TxD RxDB(+) RxDB(+) DataB(+)
4 DTR RxDA(-) RxDA(-) DataA(-)
5 GND GND GND GND
6 DSR – – –
7 RTS – – –
8 CTS – – –
Connecting to the DI/DO
The IA3341 has an 4-ch digital input and 4-ch digital output. The digital input channels and digital output
channels are located on the front side of the unit in a terminal block. The pinouts for the I/O are shown in the
figure.
Digital Input and Output Channel
(10-pin Terminal Block)
DI x 4
DO x 4
Additional wiring instructions are given below.
Digital Input Wiring
Dry Contact Wet Contact
Note: If you are using wet contacts, you must connect “COM” to power.

IA3341 Hardware User's Manual Hardware Connection Description
3-5
Digital Output Wiring
Connecting to the AI and Thermocouples
The IA3341 has a 2-ch analog input and 2-ch thermocouple input. These channels are located on the top side
of the unit in a terminal block. The pinouts for the AI and thermocouples are shown in the figure below.
Inserting the SD Card
The IA3341 has a built-in SD card socket that allows users to add additional memory by inserting an SD
memory card, without any risk to the computer.
Follow the instructions below to insert a CompactFlash card:
1. Remove the power source.
2. Unscrew the SD socket protection cover which is located on the top panel of the unit.

IA3341 Hardware User's Manual Hardware Connection Description
3-6
3. Be sure to insert the SD card correctly into the protective cover, as shown in the figure below. Push inward
and make sure that the SD card has been completely plugged in.
4. When finished, use screws to attach the protective cover to the computer.
ATTENTION
The IA3341 does not support SD hot swap and PnP (Plug and Play) function. It is necessary to remove power
source first before inserting or removing the SD card.
USB Hosts
The IA3341 provides 1 USB 2.0 full speed host (OHCI), type A connectors, which supports a keyboard or mouse,
as well as an external flash disk for storing large amounts of data.

A
A. Regulatory Approval Statements
This device complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
Class A: FCC Warning! 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
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
European Community
WARNING
This is a class A product. In a domestic environment this product may cause radio interference in which case
the user may be required to take adequate measures.