RISC-based embedded computers with GSM/GPRS, LAN, and 1 or 2 serial ports

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Evaluation units available for online purchase
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Phase-out and Last Buy Notice

The W15A/W325A series will be discontinued starting Sep. 6, 2017. The deadline for placing a final purchase order is Mar. 6th, 2018. Due to the limited availability of these products, orders will be processed till we run out of stock.
For alternative solution, please see
UC-8100 series or visit our Compact / Fanless Computers.


Features and BenefitsMoxa UC-8100 Wireless Computer Product Review

  • MOXA ART ARM9 32-bit 192 MHz processor
  • 32 MB RAM, and 16 MB flash disk onboard
  • Built-in quad band GSM/GPRS 850/900/1800/1900 MHz
  • GPRS Class 10, coding scheme from CS1 to CS4 supported
  • 1 or 2 software-selectable RS-232/422/485 serial ports
  • 10/100 Mbps Ethernet for network redundancy
  • Designed to withstand 5 g’s of continuous vibration and 50-g shocks
  • SD slot for storage expansion
  • Ready-to-run Linux Kernel 2.6 platform
  • DIN-rail or wall-mount installation
  • Robust, fanless design



The W315A/325A are embedded Linux computers that feature 1 or 2 software selectable RS-232/422/485 ports, 1 Ethernet port, and quad-band GSM/GPRS 850/900/1800/1900 MHz for cellular communication. Both the W315A and W325A come with an SD socket for external storage expansion. The W315A/325A computers’ Linux OS runs on the MOXA ART 32-bit ARM9 processor, which provides a powerful and reliable platform for harsh, industrial environments. You will find these computers ideal for a variety of machine-to-machine applications, including data acquisition, protocol conversion, and remote device control and monitoring.


The W315A and W325A, which are upgrades of the W315 and W325, provide the following benefits not provided by the W315 and W325:

1. Users can execute commands while GPRS is connected
2. Application program development is much easier using the Rcore package






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Securing Edge Devices and Data in Distributed Industrial Applications


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Hardware Specifications
OS (pre-installed) Embedded Linux with MMU support
Flash 16 MB
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-422 TxD+, TxD-, RxD+, RxD-, GND
RS-485-4w TxD+, TxD-, RxD+, RxD-, GND
RS-485-2w Data+, Data-, GND
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)
Storage Temperature -20 to 80°C (-4 to 176°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Anti-vibration 5 g’s @ IEC-68-2-6, sine wave, 5-500 Hz, 1 Oct./min, 1 hr/axis
Anti-shock 50 g’s @ 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
• 534 mA @ 24 VDC
• 970 mA @ 12 VDC
Standards and Certifications
Safety UL 60950-1, EN 60950-1, CSA C22.2 No. 60950-1-03
EMC EN 55022 Class A, EN 61000-3-2, EN 61000-3-3, EN 55024, FCC Part 15 Subpart B Class A
Radio EN 301 489-1, EN 301 489-7, EN 301 511
Green Product RoHS, CRoHS, WEEE
Alert Tools Built-in buzzer and RTC (real-time clock) with battery backup
Automatic Reboot Trigger Built-in WDT (watchdog timer)
MTBF (mean time between failures) 674,725 hrs
Warranty Period 5 years
Details See www.moxa.com/warranty
Software Specifications
OS Linux 2.6.9
File System JFFS2 (for on-board flash)
Internet Protocol Suite TCP, UDP, IPv4, SNMPv1, ICMP, ARP, HTTP, CHAP, PAP, SSH 1.0/2.0, SSL, DHCP, NTP, NFS, Telnet, FTP, TFTP, PPP, PPPoE
Internet Security OpenVPN, iptables firewall
Web Server (Apache) Allows you to create and manage Web sites, supporting PHP and XML
Terminal Server (SSH) Provides secure encrypted communications between two un-trusted hosts over an insecure network.
Dial-up Networking PPP Daemon for Linux allows Unix machines to connect to the internet through dialup lines, using the PPP protocol, as a PPP server or client. Works with 'chat', 'dip', and 'diald', among (many) others. Supports IP, TCP, UDP and (for Linux) IPX (Novell).
Watchdog Features a software function to trigger system reset in a user specified time interval. (MOXA API provided)
Application Development • Moxa API Library (Watchdog timer, Moxa serial I/O control, Moxa DI/DO API)
• GNU C/C++ Cross-Compiler
• GNU C library
• GDB source-level debugging server
Software Protection Encryption tool for user executable files (based on patented Moxa technology)

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Available Models

  Model No. Description
W315A-LX RISC-based wireless embedded computer with GSM/GPRS, 1 serial port, LAN, and SD
W325A-LX RISC-based wireless embedded computer with GSM/GPRS, 2 serial ports, LAN, and SD

Optional Accessories

RCore Software
  Model No. Description
Mass Configuration Tool A time-saving tool that helps users simultaneously deploy many tasks to Moxa’s embedded computers (available free)
MDM API Moxa Device Manager Application Program Interface (available free)
Mounting Kits
  Model No. Description
DK35A DIN-Rail Mounting Kit (35 mm)

Professional Design Service


Moxa’s customization service for industrial computing products is based on the Professional Design Service (PDS) concept, which aims to provide customers with tailor-made solutions. Industrial applications often have specific requirements, and specialized solutions are often needed. With more than 20 years of experience in the industrial networking and automation field, Moxa can offer professional, customized products and services that are ideal for your own industrial applications.

Customer Benefits
• Comprehensive consideration of platform system design gives optimal solutions, and guarantees that proposals address customer needs
• Our sophisticated customization procedures are built on meticulous production and quality control processes
•  A full-time technical support team gives customers quick and reliable solutions

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