W311/321/341
Hardware User’s Manual
Sixth Edition, March 2009
www.moxa.com/product
© 2009 Moxa Inc. All rights reserved.
Reproduction without permi ssi on is pr ohibited.
W311/321/341
Hardware User’s Manual
The hardware 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 © 2009 Moxa Inc.
All rights reserved.
Reproduction without permi ssi on is pr ohibited.
Trademarks
MOXA 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: +1-714-528-6777
Fax: +1-714-528-6778
Moxa Europe
Tel: +49-89-3 70 03 99-0
Fax: +49-89-3 70 03 99-99
:
Moxa China (Shanghai office)
Toll-free: 800-820-5036
Tel: +86-21-5258-9955
Fax: +86-10-6872-3958
Moxa Asia-Pacific
Tel: +886-2-8919-1230
Fax: +886-2-8919-1231
:
:
Table of Contents
Chapter 1 Introduction..................................................................................................1-1
Overview.................................................................................................................................. 1-2
Package Checklist.................................................................................................................... 1-2
Product Features ...................................................................................................................... 1-3
Product Hardware Specifications............................................................................................. 1-3
Hardware Block Diagram........................................................................................................ 1-6
W311 ............................................................................................................................1-6
W321 ............................................................................................................................1-6
W341 ............................................................................................................................1-7
Chapter 2 Hardware Introduction.................................................................................2-1
Appearance..............................................................................................................................2-2
W311 ............................................................................................................................2-2
W321 ............................................................................................................................2-2
W341 ............................................................................................................................2-3
Dimensions..............................................................................................................................2-4
W311 ............................................................................................................................2-4
W321 ............................................................................................................................2-5
W341 ............................................................................................................................2-6
LED Indicators......................................................................................................................... 2-7
Reset Button............................................................................................................................. 2-7
Real Time Clock......................................................................................................................2-8
Chapter 3 Hardware Connection Description .............................................................3-1
Wiring Requirements............................................................................................................... 3-2
Connecting the Power...................................................................................................3-2
Grounding the Unit.......................................................................................................3-2
Connecting Data Transmission Cables .................................................................................... 3-3
Connecting to the Network........................................................................................... 3-3
Connecting to the WLAN............................................................................................. 3-3
Connecting to a Serial Device ......................................................................................3-4
Serial Console Port....................................................................................................... 3-4
SD Slot..................................................................................................................................... 3-4
USB (W341 only) .................................................................................................................... 3-7
Relay Output (W341 only)....................................................................................................... 3-7
Appendix A Regulatory Approval Statement ................................................................ A-1
1
1
Chapter 1 Introduction
The W300 series is a line of wireless RISC-based embedded computers that features 802.11a/b/g
WLAN, RS-232/422/485 serial ports, and an Ethernet port in a small, rugged chassis. In addition,
all models feature an SD slot, and the W341 features two USB 2.0 hosts and one relay output
channel.
Your W300 series embedded computer is ideal for diverse, machine-to-machine embedded
applications. It enables wireless operation for traditionally wired networks and serial devices. The
W300 series not only provides transparent data transfers, but also numeric 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, you will learn
about the capabilities of this embedded computer.
This chapter covers the following topics:
Overview
Package Checklist
Product Features
Product Hardware Specifications
Hardware Block Diagram
¾ W311
¾ W321
¾ W341
W311/321/341 Hardware User’s Manual Introduction
Overview
The W300 Series wireless embedded computer is 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 significant 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.
On-board NOR Flash ROM and SDRAM provides ample storage capacity, and for select models,
the SD slot gives applications extra room to expand. The built-in WLAN function supports the
802.11a/b/g standard, providing transmission security with WEP, WPA and WPA2. 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 WLAN. 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 easily be ported to
W300 Series embedded computers by using a common complier, so little time is spent 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 W300 Series includes the following models:
W311-LX
A small, RISC-based, ready-to-run, wireless embedded computer with WLAN, one serial port,
Ethernet, SD slot, and Linux OS
W321-LX
A small, RISC-based, ready-to-run, wireless embedded computer with WLAN, two serial ports,
Ethernet, SD slot, and Linux OS
W341-LX
A RISC-based, ready-to-run, wireless embedded computer with WLAN, four serial ports, Ethernet,
SD slot, USB port, relay output, and Linux OS
Each model is shipped with the following items:
y W300 Series wireless embedded computer
y Quick Installation Guide
y Documentation & Software CD
y 100 cm RJ45-to-RJ45 Ethernet cross-over cable
y 100 cm console port cable (CBL-4PINDB9F-100)
y Universal Power Adaptor
y Product Warranty Statement
Optional Accessories
y 35 mm DIN-rail mounting kit (DK-35A)
NOTE: Notify your sales representative if any of the above items are missing or damaged.
1-2
W311/321/341 Hardware User’s Manual Introduction
Product Features
W300 Series computers have the following features:
y Moxa ART 32-bit ARM9 industrial communication processor
y 32 MB on-board RAM (64 MB for W341)
y 16 MB built-in flash memory
y 802.11a/b/g W irel ess LAN
y WEP, WP A and WPA2 encryption
y Infrastructure mode and Ad-Hoc mode
y RS-232/422/485 serial ports with software selectable interface
y Baudrates between 50 and 921.6 Kbps; supports non-standard baudrates
y 10/100M Ethernet for backup networking
y SD card slot for storage expansion
y Withstands 5G continuous vi brat ion and 50G shock
y LED indicators for status, serial transmission, and wireless signal strength
y Ready-to-run Linux platform
y Installation on DIN-rail or wall
y Fanless design for increased ruggedness
Product Hardware Specifications
System
CPU Moxa ART ARM9 32-bit RISC CPU, 192 MHz
DRAM W311: 32 MB W321: 32 MB W341: 64 MB
Flash W311: 16 MB W321: 16 MB W341: 64 MB
Storage Expansion W311: SD slot x 1
USB
Relay Output
Normal switching: 2A @ 30 VDC
Capacity: 60W max.
Switching power: 220 VDC max.
Switching voltage: 2A max.
Switch current: 4 ms @ 20°C
Operation time: 100 Mohm max.
Initial contact resistance:
Console Port
Button
Others RTC, buzzer, Watchdog Timer
OS Built-in Embedded Linux with MMU support, based on Linux Kemel
W341: USB 2.0 host × 2
Form C, SPDT × 1
RS-232 × 1 (TxD, RxD, GND), 4-pin header output, “115200, n, 8, 1”
Reset button × 1, supports “Reset to Factory Default”
2.6
W321: SD slot × 1 W341: SD slot × 1
1-3
W311/321/341 Hardware User’s Manual Introduction
WLAN Communication
Standard Compliance 802.11a/b/g
Radio Frequency Type DSSS, CCK, OFDM
Media Access Protocol Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
Modulation 802.11a/g: OFDM (64-QAM, 16-QAM, QPSK, BPSK) 802.11b: DSSS
(DBPSK, DQPSK, CCK)
Transmission Power
(Typical)
5.15 to 5.35 GHz: 15 dBm @6 Mbps; 12 dBm @54 Mbps
5.725 to 5.825 GHz: 15 dBm @6 Mbps; 12 dBm @54 Mbps
USA: 2.412 to 2.462 GHz (IEEE802.11g): 17 dBm @6 Mbps;
EU: 2.412 to 2.472 GHz 15 dBm @54Mbps
2.412 to 2.462 GHz (IEEE802.11b): 18 dBm@ 1 to 11 Mbps
Receiver Sensitivity
(Typical)
5.15 to 5.35 GHz: 6 Mbps @ -90 dBm; 54 Mbps @ -72 dBm
5.47 to 5.725 GHz: 6 Mbps @ -90 dBm; 54 Mbps @ -72 dBm
5.725 to 5.825 GHz: 6 Mbps @ -89 dBm; 54 Mbps @ -72 dBm
USA: 2.412 to 2.462 GHz (IEEE802.11g): 6 Mbps @ -90 dBm;
EU: 2.412 to 2.472 GHz 54 Mbps @ -73 dBm
USA: 2.412 to 2.462 GHz (IEEE802.11b): 11 Mb ps @ -8 7 dB m;
EU: 2.412 to 2.472 GHz 1 Mbps @ -94 dBm
Transmission Rate 54 Mbps with auto fallback (54, 48, 36, 24, 18, 12 , 11 , 9, 6 , 5.5 , 2, 1
Mbps)
802.11b supported rates: 1, 2, 5.5, 11 Mbps
802.11a/g supported rates: 6, 9, 12, 18, 24, 36, 48, 54 Mbps
Transmission Distance 100 meters at 11 Mbps (with no obstructions)
Security WEP 64-bit/128-bit, WPA, WPA2 data encryption
Antenna Connector Reverse SMA
Antenna External 2 dBi dipole antenna
WLAN Mode Infrastructure, Ad-Hoc
Network Communication
LAN
10/100 Mbps RJ45 × 1, auto-sensing
Protection 1.5 KV built-in magnetic isolation protection
Serial Communication
Serial Port
W311: RS-232/422/485 DB9 male × 1
W321: RS-232/422/485 DB9 male × 2
W341: RS-232/422/485 DB9 male × 4
Protection 15 KV built-in ESD protection for all signals
Data bits 5, 6, 7, 8
Stop bits 1, 1.5, 2
Parity None, Even, Odd, Space, Mark
Flow Control RTS/CTS, XON/XOFF, RS-485 ADDC™
Speed 50 bps to 921.6 Kbps; supports non-standard baudrates
LEDs
System Ready, SD activity
WLAN Enable, signal strength
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W311/321/341 Hardware User’s Manual Introduction
LAN 10 M/Link, 100 M/Link (RJ45 connector)
Serial TxD, RxD
Power Requirements
Power Input 12 to 48 VDC
Power Consumption W311: 400 mA @ 12 VDC
W321: 400 mA @ 12 VDC
W341: 600 mA @ 12 VDC with no USB devices attached
1.2A @ 12 VDC with USB de vi ces on each port at max spec
500 mA @ 5 VDC
Mechanical
Dimension
(W × D × H)
(without wall mount ear or antenna)
W311: 77 × 111 × 26 mm
W321: 77 × 111 × 26 mm
W341: 150 × 100 × 38 mm
Antenna 110 mm
Construction Material W311: aluminum, 1 mm
W321: aluminum, 1 mm
W341: aluminum, 1 mm / SECC, 1 mm for rear panel
Mounting DIN-rail, wall
Environmental
Operating Temperature -10 to 60°C (14 to 140°F), 5 to 95% RH
Storage Temperature -20 to 80°C (-4 to 176°F), 5 to 95% RH
Regulatory Approvals
EMC FCC, CE (Class A)
Safety TUV, UL, cUL
Others RoHS, CRoHS, WEEE
Warranty
5 years
1-5
W311/321/341 Hardware User’s Manual Introduction
Hardware Block Diagram
W311
W321
Power
Circuit
RTC
Watchdog
Ethernet
LAN
PHY
MAC
802.11a/b/g
WLAN
MOXA ART CPU
32-bit ARM9
192 MHz
UART
Serial
Port 1
RS-232/422/485 RS-232
UART
Console
Port
16MB
RAM
8MB
Flash
SD
Function
Power
Circuit
RTC
Watchdog
Ethernet
LAN
PHY
MAC
802.11a/b/g
WLAN
MOXA ART CPU
32-bit ARM9
192 MHz
UART
Serial
Port 1
RS-232/422/485 RS-232
UART
Serial
Port 2
UART
Console
Port
16MB
RAM
8MB
Flash
SD
Function
1-6
W311/321/341 Hardware User’s Manual Introduction
W341
Power
Circuit
RTC
Watchdog
802.11a/b/g
USB 2.0
Host x 2
WLAN
MOXA ART CPU
32-bit ARM9
192 MHz
UART UARTUART UART
Serial
Serial
Port 1
Port 2
RS-232/422/485
Ethernet
Serial
Port 3
LAN
PHY
MAC
Serial
Port 4
Relay
Output
UART
Console
Port
RS-232
16MB
RAM
8MB
Flash
SD
Function
1-7
2
2
Chapter 2 Hardware Introduction
The W300 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.
This chapter covers the following topics:
Appearance
¾ W311
¾ W321
¾ W341
Dimensions
¾ W311
¾ W321
¾ W341
LED Indicators
Reset Button
Real Time Clock
W311/321/341 Hardware User’s Manual Hardware Introduction
Appearance
W311
Wireless LAN
Ethernet
(10/100BaseTx)
12 to 48 VDC
P1
Antenna
Serial
Console Port
Internal SD Slot for
Storage Expansion
(remove cover to access)
W321
Serial Port
(RS-232/422/485)
Ethernet
(10/100BaseTx)
12 to 48 VDC
Wireless LAN
Antenna
Serial
Console Port
Internal SD Slot for
Storage Expansion
(remove cover to access)
Serial Port 1
(RS-232/422/485)
Serial Port 2
(RS-232/422/485)
2-2
W311/321/341 Hardware User’s Manual Hardware Introduction
W341
Top View
Relay OutputReset Button Internal SD Slot for
12-48V
RELAY
ON
CN
MOC
Reset
USB 2.0 Host
LAN
USB
Storage Expansion
(remove cover to access)
Front View
Ethernet
(10/100BaseTx)
Relay Output
48 VDC
12 to
12 to 48 VDC
Ethernet
10/100BaseTX
USB 2.0 Host x 2
Wireless LAN
antenna
Wireless LAN
Antenna
Internal SD Slot for
Storage Expansion
(remove cover to access)
Serial
Console Port
Serial Port 1 to 4
Bottom View
(RS-232/422/485)
Serial Port x 4
(RS-232/422/485)
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W311/321/341 Hardware User’s Manual Hardware Introduction
Dimensions
W311
148.1 mm (5.83 in)
25 mm
111 mm (4.37 in)
(0.98 in)
43 mm (1.69 in)
(1.02 in)
26 mm
77 mm (3.03 in)
88 mm (3.46 in)
100 mm (3.94 in)
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W311/321/341 Hardware User’s Manual Hardware Introduction
W321
148.1 mm (5.83 in)
25 mm
111 mm (4.37 in)
(0.98 in)
43 mm (1.69 in)
(1.02 in)
26 mm
77 mm (3.03 in)
88 mm (3.46 in)
100 mm (3.94 in)
2-5
W311/321/341 Hardware User’s Manual Hardware Introduction
W341
RELAY
100 mm (3.93 in)
Reset
12-48V
LAN
NO
NC
COM
USB
25 mm
(0.98 in)
137.1 mm (5.40 in)
35 mm (1.38 in)
38 mm
(1.50 in)
40.5 mm (1.59 in)
150 mm (5.91 in)
161 mm (6.34 in)
173 mm (6.81 in)
2-6
W311/321/341 Hardware User’s Manual Hardware Introduction
LED Indicators
Please note that the W311 does not include an SD slot, so it will not have an SD LED.
LED Name LED Color LED Function
Ready
SD
WLAN
Signal Strength
LAN
TxD P1-P4
RxD P1-P4
Green Power is on and functioning normally
Off Power is off or there is another power error
Green SD card is detected
Off No SD card is detected
ON: WLAN is ready
Green
Off WLAN is not ready or function error
Green
Off No signal or WLAN connection failed
Orange 10 Mbps Ethernet link
Green 100 Mbps Ethernet link
Off Disconnected or short circuit
Green Serial ports P1-P4 transmitting data
Off Serial ports P1-P4 not transmitting data
Yellow Serial ports P1-P4 receiving data
Off Serial ports P1-P4 not receiving data
Blinking: Conflict with WLAN IP or no response from
DHCP server
Number of glowing LEDs indicates signal strength
5: Excellent
4: Very good
3: Good
2: Fair
1: Bad
Reset Button
Hold the reset button down 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 data.
The reset button is NOT designed as a hard reboot for the embedded computer.
ATTENTION
Restoring default settings preserves your data
Resetting the embedded computer to factory defaults will NOT format the user directory and will
NOT erase the user’s data. The reset button only loads a configuration file. All files in the /etc
directory will revert to their factory defaults, but all other user data will remain intact in the Flash
ROM.
Please note that if there is a problem with the /etc directory, the embedded computer may be
unable to restore the factory default settings.
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W311/321/341 Hardware User’s Manual Hardware Introduction
Real Time Clock
The embedded computer’s real-time clock is powered by a lithium battery. We strongly
recommend that you NOT replace the lithium battery on your own. If the battery needs to be
changed, please contact the Moxa RMA service team.
ATTENTION
There is a risk of explosion if the wrong type of battery is used. To avoid this potential danger,
always be sure to use the correct type of battery. Contact the Moxa RMA service team for battery
replacement.
2-8
3
3
Chapter 3 Hardware Connection Description
W300 Series wireless embedded computers are equipped for multiple types of connections.
WLAN, Ethernet, and multiple serial interfaces are built into every model, including a serial
console port for monitoring of bootup messages. Select models also include an SD slot for storage
expansion, USB ports for additional device and storage options, and relay output connections.
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.
This chapter covers the following topics:
Wiring Requirements
¾ Connecting the Power
¾ Grounding the Unit
Connecting Data Transmission Cables
¾ Connecting to the Network
¾ Connecting to the WLAN
¾ Connecting to a Serial Device
¾ Serial Console Port
SD Slot
USB (W341 only)
Relay Output (W341 only)
W311/321/341 Hardware User’s Manual Hardware Connection Description
Wiring Requirements
This section describes how to connect serial devices to the embedded computer.
You should heed the following common safety precautions before proceeding with the installation
of any electronic device:
y 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 differe nt s i gna l characteristics should be routed separately.
y 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.
y Keep input wiring and output wiring separate.
y It is advisable to label the wiring to all devices in the system.
ATTENTION
Safety First!
Be sure to disconnect the power cord before installation and/or wiring.
Watch Electrical Current!
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 coul d overheat, causing serious
damage to your equipment.
Watch Temperature!
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
Connect the “live-wire” end of the 12-48 VDC power adapter to the embedded computer’s
terminal block. When power is properly supplied, 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 any devices, run a ground wire from the ground screw to the grounding
surface.
3-2
W311/321/341 Hardware User’s Manual Hardware Connection Description
ATTENTION
This product should be mounted to a well-grounded mounting surface such as a metal panel.
SG
V+V-
12-48V
SG: The Shielded Ground (sometimes called
Protected Ground) contact is the left most contact
of the 3-pin power terminal block connector, as
viewed from the angle shown here. Connect the
SG wire to an appropriate grounded metal
surface.
Connecting Data Transmission Cables
This section describes how to connect cables for the network, serial devices, and 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 uses 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.
The LED indicator on the left glows a solid orange
8 1
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.
Pin Signal
1 ETx+
2 ETx3 ERx+
4 --5 --6 ERx7 --8 ---
Connecting to the WLAN
The wireless embedded computer is WLAN ready and includes an 802.11 a/b/g WLAN module. It
supports WEP, WPA and WPA2 data encryption. T o verify WLAN operation, first configure your
WLAN settings on the embedded computer using the serial console or a wired network connection.
Please refer to the operating system user’s manual for further detail.
3-3
W311/321/341 Hardware User’s Manual Hardware Connection Description
Connecting to a Serial Device
Your serial device can plug into the embedded computer’s serial port using a serial cable. Serial
ports P1 to P4 have male DB9 connectors and can be configured for RS-232, RS-422, or RS-485
communication through software. The pin assignments are shown in the following table:
DB9 Male Port RS-232/422/485 Pinouts
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
4
3
2
1
54321
9876
Pin Signal
1 TxD
2 RxD
3 NC
4 GND
Pin RS-232 RS-422
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 --- --- ---
RS-485
(4-wire)
RS-485
(2-wire)
SD Slot
The W311/321/341 provide an SD slot for storage expansion. Moxa provides an SD flash disk for
plug & play expansion that allows users to plug in a Secure Digital (SD) memory card compliant
with the SD standard V1.0 for up to 1 GB of additional memory space. The following steps show
you how to install SD card into the W311/321/341.
W311/321
The SD slot is located on the right side of the W311/321 enclosure. To install an SD card, you
must first remove the SD slot’s protective cover to access the slot, and then plug the SD card
directly into the slot.
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W311/321/341 Hardware User’s Manual Hardware Connection Description
The SD card will be mounted at /mnt/sd. Detailed installation instructions are shown below:
Step 1: Use a screwdriver to remove the screws holding the SD slot’s outer cover.
Step 2: After removing the cover, insert the SD memory card as shown.
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W311/321/341 Hardware User’s Manual Hardware Connection Description
W341
The SD slot is located on the front panel of the W341. To install an SD card, you must first remove
the SD slot’s protective cover to access the slot, and then plug the SD card directly into the slot.
The SD card will be mounted at /mnt/sd. Detailed installation instructions are shown below:
Step 1: Use a screwdriver to remove the screws holding the SD slot’s outer cover, and then
remove the cover.
Step 2: Insert the SD memory card as shown.
NOTE: To remove the SD card from the slot, press the SD card in slightly with your finger, and
then remove your finger to cause the card to spring out partially. You may now grasp the top of the
card with two fingers and pull it out.
Before removing the SD card, remember to type /sync to ensure that your data has been written.
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W311/321/341 Hardware User’s Manual Hardware Connection Description
USB (W341 only)
The W341 includes two USB 2.0 hosts. These hosts can be used for an external flash disk or hard
drive in order to store large amounts of data.
USB 2.0 Ports
Relay Output (W341 only)
The W341 includes a relay output channel. There is a 3-pin terminal block for
the relay output connection, with pinouts as shown in the figure.
ON
RELAY
MOC
CN
3-7
This product has been tested and complies with the specifications 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 according to 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 is found 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 or devices
Connect the equipment to an outlet other than the receiver's
Consult a dealer or an experienced radio/TV technician for assistance
A
A
Appendix 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.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with a minimum distance of
20 cm between the radiator & your body.
With the 5.15-5.25 GHz band, U-NII devices will be restricted to indoor operations to reduce
any potential for harmful interference to co-channel MSS operations.
Warning: Changes or modifications to this unit not expressly approved by the party responsible
for compliance could void the user authority to operate the equipment.
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