Moxa Technologies W315A User manual

W315A/325A User’s Manual
Second Edition, March 2011
www.moxa.com/product
© 2011 Moxa Inc. All rights reserved.

W315A/325A 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
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Fax: [phone]
Moxa Asia-Pacific
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Fax: [phone]

Table of Contents
1. Introduction ...................................................................................................................................... 1-1
Overview ...........................................................................................................................................1-2
Package Checklist ...............................................................................................................................1-2
Product Features ................................................................................................................................1-3
Hardware Specifications ......................................................................................................................1-3
Hardware Block Diagrams ....................................................................................................................1-5
W315A.......................................................................................................................................1-5
W325A.......................................................................................................................................1-5
2. Hardware Introduction ..................................................................................................................... 2-1
Appearance........................................................................................................................................2-2
W315A.......................................................................................................................................2-2
W325A.......................................................................................................................................2-2
Dimensions ........................................................................................................................................2-3
LED Indicators....................................................................................................................................2-3
Reset Button ......................................................................................................................................2-4
Real Time Clock..................................................................................................................................2-4
3. Hardware Connection Description ..................................................................................................... 3-1
Installing the W315A/325A ..................................................................................................................3-2
Wiring Requirements...........................................................................................................................3-2
Connecting the Power ..................................................................................................................3-3
Grounding the Unit ......................................................................................................................3-3
Connecting Data Transmission Cables ...................................................................................................3-3
Connecting to the Network ...........................................................................................................3-3
Connecting to a Serial Device .......................................................................................................3-4
Connecting to the Serial Console Port ............................................................................................3-4
Connecting an Antenna ................................................................................................................3-4
Installing a SIM Card...........................................................................................................................3-5
Installing an SD Card for Storage Expansion ..........................................................................................3-5
A. Regulatory Approval Statement ........................................................................................................ A-1

1
1. Introduction
The W315A/325A wireless RISC-based embedded computers feature a GSM/GPRS module, RS-232/422/485
serial ports, and an Ethernet port in a small, rugged chassis. In addition, the W315A and W325A come with an
SD socket, making them the ideal solution when the applications require external storage expansion.
The W315A/325A embedded computers are ideal for diverse, machine-to-machine embedded applications. The
computers enable the wireless operation of traditionally wired network and serial devices, and can handle
transparent data transfer, numerical computing, protocol conversion, data processing, and even data
encryption. You will find it easier to build embedded systems for distributed peer-to-peer communication, turn
wired devices into wireless devices, and introduce higher mobility and more intelligence to your system. In this
chapter, we cover the various capabilities of the W315A/325A series embedded computers.
The following topics are covered in this chapter:

Overview

Package Checklist

Product Features

Hardware Block Diagrams
W315A
W325A

W315A/325A Introduction
1-2
Overview
The W315A/325A wireless embedded computers are designed around the MOXA ART ARM9 32-bit RISC
processor. Unlike the X86 CPU, which uses a CISC design, the MOXA ART ARM9 uses RISC architecture and
modern semiconductor technology to provide a powerful computing engine without generating a significant
amount of heat. The processor also integrates UART and LAN functions to provide exceptional communication
performance, but without the bus bandwidth limitations associated with general ARM-based communication
products.
An onboard NOR Flash ROM and SDRAM provide ample storage capacity, and the SD slot gives applications
extra room to expand. The built-in GSM/GPRS function supports the 850/900/1800/1900 MHz frequency bands,
providing a coding scheme from CS-1 to CS-4. The backup LAN port not only provides an alternative solution
for networking, but also supports Ethernet clients, allowing any network device to plug in and connect to the
GPRS network. The built-in RS-232/422/485 serial ports support a wide range of serial devices, making this
platform suitable for data acquisition and protocol conversion applications.
The Linux-based operating system comes pre-installed and ready to run, providing an open platform for
software development. Software written for desktop PCs can be ported easily to W315A/325A series embedded
computers by using a common compiler, so you do not need to spend a lot of time modifying existing software
code. In addition, the operating system, device drivers, and user-developed software can all be stored in the
built-in flash memory.
Package Checklist
The W315A/325A Series includes the following models:
W315A-LX
Mini RISC-based, ready-to-run, wireless embedded computer with GSM/GPRS, one serial port, LAN, SD, and
Linux OS
W325A-LX
Mini RISC-based, ready-to-run, wireless embedded computer with GSM/GPRS, two serial ports, LAN, SD, and
Linux OS
Each model is shipped with the following items:
•W315A or W325A 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
•GSM/GPRS antenna
•Documentation and software CD
•Quick installation guide (printed)
•Warranty card
Optional Accessories
•35 mm DIN-rail mounting kit (DK-35A)
NOTE: Please notify your sales representative if any of the above items are missing or damaged.

W315A/325A Introduction
1-3
Product Features
W315A/325A series embedded computers have the following features:
•MOXA ART 32-bit ARM9 RISC industrial communication processor
•16 MB built-in flash memory
•RS-232/422/485 serial ports with software selectable interface
•Baudrate between 50 and 921.6Kbps; supports non-standard baudrates
•10/100M Ethernet for backup networking
•Built-in quad band 850/900/1800/1900 MHz GSM/GPRS module
•GPRS class 10
•Coding scheme from CS1 to CS4
•SD card slot for storage expansion
•Designed to withstand continuous 5G vibration and a 50G shock
•LED indicators for status, serial transmission, and wireless signal strength
•Ready-to-run Linux platform
•Can be installed on a DIN-Rail or wall mounted
•Fanless design for increased ruggedness
Hardware Specifications
Computer
CPU: MOXA ART ARM9 32-bit RISC CPU, 192 MHz
OS (pre-installed): Embedded Linux with MMU support
DRAM: 32 MB
Flash: 16 MB
Storage
Storage Expansion: SD slot
Ethernet Interface
LAN: 1 auto-sensing 10/100 Mbps port (RJ45)
Magnetic Isolation Protection: 1.5 KV built-in
Cellular Interface
Cellular Modes: GSM, GPRS
Radio Frequency Bands: 850/900/1800/1900 MHz
GPRS Class: 10
Coding Schemes: CS1 to CS4
Serial Interface
Serial Standards: 1 or 2 RS-232/422/485 ports, software-selectable (DB9 male)
ESD Protection: 15 KV ESD protection for all signals
Console Port: RS-232 interface (TxD, RxD, GND), with 4-pin pin header output
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 (non-standard baudrates supported; 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

W315A/325A Introduction
1-4
LEDs
System:Ready, SD
LAN: 10M/Link, 100M/Link (on connector)
Cellular: GPRS Enabled, GSM Signal Strength
Serial: TxD, RxD
Switches and Buttons
Reset Button: Supports "Reset to Factory Default"
Physical Characteristics
Housing: Aluminum (1 mm)
Weight: 195 g
Dimensions: (without ears or antenna)
77 x 111 x 26 mm (3.03 x 4.37 x 1.02 in)
Mounting: DIN-rail (requires optional DK-35A DIN-rail kit), wall
Antenna Length: 84 mm
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: 5 g @ IEC-68-2-6, sine wave, 5-500 Hz, 1 Oct./min, 1 hr/axis
Anti-shock: 50 g @ IEC-68-2-6, half-sine wave, 30 ms
Power Requirements
Input Voltage: 12 to 48 VDC
Power Consumption:
Without GPRS loading: 4.8 W
• 100 mA @ 48 VDC
• 200 mA @ 24 VDC
• 400 mA @ 12 VDC
With GPRS loading: 12 W
• 330 mA @ 48 VDC
• 540 mA @ 24 VDC
• 1000 mA @ 12 VDC
• 200 mA @ 24 VDC
• 400 mA @ 12 VDC
Regulatory Approvals
EMC: CE (EN55022 Class A, EN61000-3-2, EN61000-3-
3, EN55024), FCC (Part 15 Subpart B, CISPR 22 Class
A, ANSI C63.4)
Safety: UL/cUL (UL60950-1), LVD (EN 60950-1)
R&TTE: EN301 489-1, EN301 489-7, EN301 511
Safety: LVD: EN60950-1
UL/cUL: UL60950-1, CSA C22.2 No. 60950-1-03
Green Product: RoHS, CRoHS, WEEE
Reliability
Alert Tools: Built-in buzzer and RTC (real-time clock) with battery backup
Automatic Reboot Trigger: Built-in WDT (watchdog timer)
Warranty
Warranty Period: 5 years
Details: See www.moxa.com/warranty

W315A/325A Introduction
1-5
Hardware Block Diagrams
W315A
W325A

2
2. Hardware Introduction
The W315A/325A series embedded computers are compact, well-designed, and built rugged enough for
industrial applications. LED indicators help you monitor performance and identify trouble spots, multiple serial
ports allow you to connect different devices for wireless operation, and the reliable and stable hardware
platform lets you devote your attention to developing your applications.
The following topics are covered in this chapter:

Appearance
W315A
W325A

Dimensions

LED Indicators

Reset Button

Real Time Clock

W315A/325A Hardware Introduction
2-2
Appearance
W315A
W325A

W315A/325A Hardware Introduction
2-3
Dimensions
W315A W325A
LED Indicators
LED Name LED Color LED Function
Ready Green Power is on and functioning normally
Off Power is off or a power error exists
SD Green SD card is detected
Off SD card is not detected
GPRS Green ON: GPRS is ready
Blinking: Conflict with GPRS IP or no response from DHCP server
Off GPRS is not ready or function error exists
Signal Strength Green Number of glowing LEDs indicates signal strength
5: Excellent
4: Very good
3: Good
2: Fair
1: Bad
Off No signal or GPRS connection failed
LAN Orange 10 Mbps Ethernet link
Green 100 Mbps Ethernet link
Off Disconnected or short circuit
TxD
P1-P2
Green Serial ports P1-P2 transmitting data
Off Serial ports P1-P2 not transmitting data
RxD
P1-P2
Orange Serial ports P1-P2 receiving data
Off Serial ports P1-P2 not receiving data

W315A/325A Hardware Introduction
2-4
Reset Button
Hold in the reset button for 5 seconds to load the factory default configuration. After loading the factory
defaults, the system will reboot automatically. We recommend that you use this function only if the software is
not working properly. To reset the Linux system software, always use the software reboot command (“reboot”)
to protect the integrity of your data.
The reset button is NOT designed to hard reboot the embedded computer.
ATTENTION
Restoring default settings preserves your data
Resetting the embedded computer to factory defaults will format the user directory and erase the
contents in
/etc and /home. The reset button only loads a configuration file. All files in the /etc
directory will revert to
their factory defaults.
Note that if there is a problem with the /etc
directory, the embedded computer may be unable to restore the
factory default settings.
Real Time Clock
The embedded computer’s real-time clock is powered by a lithium battery. We strongly recommend that you do
NOT replace the lithium battery on your own. If the battery needs to be changed, contact the Moxa RMA service
team.
WARNING
There is a risk of explosion if the wrong type of battery is used. To avoid this potential danger, always use the
correct type of battery. Contact the Moxa RMA service team if you need to replace your battery. D
ispose of
used batteries according to the instructions on the battery.

3
3. Hardware Connection Description
The W315A/325A wireless embedded computers support multiple connection types. GSM/GPRS, Ethernet, and
one or more serial ports are built into every model. In addition, the computers come with a serial console port
for monitoring bootup messages. All models include an SD storage socket for additional device and storage
options. With the open-source Linux kernel, you are free to develop custom applications for remote, wireless
operation of your device. In this chapter, learn how to connect the embedded computer to the network and to
various devices.
The following topics are covered in this chapter:

Installing the W315A/325A

Wiring Requirements
Connecting the Power
Grounding the Unit

Connecting Data Transmission Cables
Connecting to the Network
Connecting to a Serial Device
Connecting to the Serial Console Port
Connecting an Antenna

Installing a SIM Card

Installing an SD Card for Storage Expansion

W315A/325A Hardware Connection Description
3-2
Installing the W315A/325A
Wall or Cabinet Mounting
The W315A/325A embedded computers have built-in “ears” for
attaching the embedded computers to a wall or the inside of a cabinet.
We suggest using two screws per ear to attach the W315A/325A to a
wall or cabinet.
The heads of the screws should be less than 6.0 mm in diameter, and
the shafts should be less than 3.5 mm in diameter.
DIN-Rail Mounting
DIN-rail attachments can be purchased separately to attach the product to a DIN-rail. When
snapping the attachments to the DIN-rail, make sure that the stiff metal springs are at the top.
Wiring Requirements
In this section, we describe how to connect serial devices to the embedded computer. Read and follow these
common safety precautions before proceeding with the installation:
•Use separate paths to route wiring for power and devices. If power wiring and device wiring paths must
cross, the wires should be perpendicular at the intersection point.
NOTE: Do not run signal or communication wiring together with power wiring in the same wire
conduit. To avoid interference, wires with different signal characteristics should be routed
separately.
•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.
•It is a good idea to label the wiring to all devices in the system.
ATTENTION
Safety First!
Be sure to disconnect the power cord before installing and/or wiring your W315A/325A.
Wiring 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 and cause 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.

W315A/325A Hardware Connection Description
3-3
Connecting the Power
The PC’s power source should be provided by a UL listed class 2 or “Limited Power Source” (LPS), with external
adaptor output rated at 12 to 48 VDC, with minimum amperage of 1.2 A. If the power is supplied properly, the
“Ready” LED will glow a solid green after a 25 to 30 second delay.
Grounding the Unit
Grounding and wire routing help limit the effects of noise due to electromagnetic interference (EMI). Before
connecting devices, run a ground wire from the ground screw to the grounding surface.
ATTENTION
This product should be mounted to a well-grounded mounting surface such as a metal panel.
SG: The Shielded Ground (sometimes called Protected
Ground) contact is the left most contact of the 3-pin power
terminal block connector when viewed from the angle shown
here. Connect the SG wire to an appropriate grounded metal
surface.
Connecting Data Transmission Cables
In this section, we describe how to connect the W315A/325A embedded computers to the network, serial
devices, and a serial COM terminal.
Connecting to the Network
Plug your network cable into the embedded computer’s Ethernet port. The other end of the cable should be
plugged into your Ethernet network. When the cable is properly connected, the LEDs on the embedded
computer’s Ethernet port will glow to indicate a valid connection.
The 10/100 Mbps Ethernet LAN port accepts 8-pin RJ45 connectors. The following diagram shows the pinouts
for these ports.
The LED indicator on the
right glows a solid green color when the
cable is properly connected to a 100 Mbps Ethernet network. The
LED will flash on and off when Ethernet packets are being
transmitted or received.
Pin Signal
1 ETx+
2 ETx-
3 ERx+
4 –
5 –
6 ERx-
7 –
8 –
The LED indicator on the
left glows a solid orange color when the
cable is properly connected to a 10 Mbps Ethernet network. The
LED will flash on and off when Ethernet packets are being
transmitted or received.

W315A/325A Hardware Connection Description
3-4
Connecting to a Serial Device
Use a serial cable to plug your serial device into the embedded computer’s serial port. Serial ports P1 to P2 have
male DB9 connectors and can be configured for RS-232, RS-422, or RS-485 communication by software. The
pin assignments are shown in the following table:
DB9 Male Port RS-232/422/485 Pinouts
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 Serial Console Port
The serial console port is a 4-pin pin-header RS-232 port. It is designed for serial console terminals, which are
useful for viewing boot up messages.
Serial Console Port & Pinouts Serial Console Cable
Pin Signal
1 TxD
2 RxD
3 NC
4 GND
Connecting an Antenna
The W315A/325A embedded computers come with a 1 dBi antenna for GPRS communication. Connect the
antenna to the SMA connector located on the front panel of the embedded computer. Connect the antenna to
the computer by rotating it in a clockwise direction.

W315A/325A Hardware Connection Description
3-5
Installing a SIM Card
The W315A/325A embedded computers have a built-in GSM/GPRS cellular module to provide long-range
communication. SIM (Subscriber Identity Module) cards are used to authenticate and identify subscribers when
connecting to a network.
Follow these steps to install a SIM card:
Step1:Before you install a SIM card, make sure the embedded computer is powered off.
Step2: Use a screwdriver to remove the protective cover to access the slot.
Note that the SD slot and SIM card slot for the W315A/325A share the same
protective cover.
Step3: When
inserting the SIM
card, make sure
the chip is facing
upwards. Plug the
SIM card directly
into the slot.
Step 4: Power on the embedded computer and start the operating system.
Step 5: To operate GPRS connection, refer to the operating system user’s manual for details.
NOTE To remove the SIM card from the slot, press the SIM card in slightly with your finger, and
then remove your
finger to allow the card to spring out partially. You may now grasp the top of the
card with two fingers and pull
it out.
Installing an SD Card for Storage Expansion
The W315A/325A embedded computers have an SD slot for storage expansion. The SD slot allows users to plug
in a Secure Digital (SD) memory card compliant with the SD 1.0 standard for up to 1 GB of additional memory
space, or a Secure Digital High Capacity (SDHC) memory card compliant with the SD 2.0 standard for up to 16
GB of additional memory space. The following steps show you how to install an SD card.
The SD slot is located on the right side of the W315/W325 casing. To install an SD card, first remove the
protective cover to access the slot, and then plug the SD card directly into the slot.
Step 1:Use a screwdriver to remove the screws holding the SD/SIM card slot’s outer cover.
Step 2: After
removing the cover,
insert the SD memory
card into the slot.

A
A. Regulatory Approval Statement
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.
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.
2. This device must accept any interference received, including interference that may cause undesired
operation.
This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in
a residential installation.
This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
•Consult with the dealer or an experienced radio/TV technician.
CAUTION:
Any changes or modifications not expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment.

W315A/325A Regulatory Approval Statement
A-2
Prohibition of co-location:
This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or
transmitter.
Safety Information:
To maintain compliance with the FCC’s RF exposure guidelines, when installing and/or operating this
equipment, you should maintain a minimum distance of 20 cm between the transmitter and your body. Use
only the supplied antenna. Unauthorized antennae, modifications, or attachments could damage the
transmitter and may violate FCC regulations. The device includes a GPRS module. This module has been
approved by FCC. The FCC ID is 09EQ24PL001.