Moxa Technologies W321, W341-LX Quick Installation Manual

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P/N: 1802003116015

W321/341-LX

Quick Installation Guide

Sixth Edition, April 2013

1. Overview

The W321/341 embedded computers featu re 2 or 4
RS-232/422/485 serial ports, 1 Ethernet port, 4 DI/DO (W321
only), an embedded 802.11 b/g/n wireless LAN module, and an SD
socket interface for storage expansion, making the W321/341
ideal for compact, wireless embedded applications.

2. Package Checklist

Please verify that the package contains the following items:

• 1 W321/341 embedded computer

• Quick Installat ion Guide

• Document & Software CD

• Ethernet Cable: RJ45 to RJ45 cross-over cable, 100 cm

• CBL-4PINDB9F-100: 4-pin header to DB9 female console port

cable, 100 cm

• WLAN Antenna

• Universal Power Adaptor

• Product Warranty Statement

Optional Accesso ries

• 35 mm DIN rail Moun ting Kit (DK- 35A)

3. W321/341 Panel Layout

W341-LX

W321-LX

LED Indicators

The following t able describe s the LED indica tors located on the
front panel of the W321/341.

LED Name

Color

LED Function

Ready

Green

Power is on and functioning normally

Off

Power is off or power failure

SD

Green

SD card detected

Off

No SD card detected

WLAN

Green

ON: WLAN is ready
Blinking: WLAN IP conflict or DHCP server

not responding

Off

WLAN is not enabled or connection failure

Signal
Strength
(5 LEDs)

Green

Number of glowin g LEDs indica tes signal
strength:
5: Excellent
4: Very good
3: Good
2: Fair

1: Bad

Off

No signal

LAN

Orange

10 Mbps Ethernet link

Green

100 Mbps Etherne t link

Off

Disconnected or short circuit

TxD
(P1-P4)

Green

Serial port (1 -2 for W321, 1-4 for W341)

transmitting data

Off

Serial port(1- 2 for W321, 1-4 for W341) not
transmitting data

RxD
(P1-P4)

Yellow

Serial port (1 -2 for W321, 1-4 for W341)

receiving data

Off

Serial port (1-2 for W321, 1-4 for W341) not
receiving data

If you find a weak wireless communication (where the signal
strength indic ates “Bad”), we suggest you ins tall the W321/ 341
computers at some other place within a stronger wireless signal
range, or boost the signal by installing another wireless access
point or bridge.

4. Installing the W321/341

Wall or Cabinet Mounting

The W321 have bu ilt

-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 W3

21/341 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, as shown by the figure
at the right.

The W341 comes with two metal attachment plates for attaching
the embedded computer to a wall or the

inside of a cabine t. First,

use two screws per bracket to attach the brackets to the rear of the
W341. Next, use two screws per bracket to attach the W341 to a
wall or cabinet .

DIN Rail Mounting

DIN rail attachments can be purchased separately to attach the
product to a DIN rail. When sna pping the clips onto the DIN rail,
make sure that the stiff metal springs are at the top.

Wall or Mounting

DIN rail Mounting

5. Connector Description

Power Connector

Connect the 12 to 48 VDC LPS or Class 2 power line to the
W321/341’s terminal block. If the power is properly supplied, the
Power LED will l ight up. The OS is ready when the Ready LED
glows a solid green.

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www.moxa.com/support

The Americas:

[phone] (toll-free: 1-888-669-2872)

Europe:

[phone]

Asia-Pacific:

[phone]

China:

[phone] (toll-free: 800-820-5036)

 2013 Moxa Inc. All rig hts reserved.

Grounding the W321/341

Grounding and wire routing help 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
the power.

ATTENTION

This product is intended to be mounted to a

well-

grounded

mounting surface such as a metal panel.

Shielded Ground:

The

shielded ground (or SG, sometimes called

p

rotected ground

) contact is the leftmost contact

of the 3

-pin power term inal block, when viewed

from the angle shown here. Connect the SG wire to
an appropriate grounded metal surface.

Ethernet Ports

The 10/100 Mbps Ethernet port uses RJ45 connectors.

Pin

Signal

1

ETx+

2

ETx-

3

ERx+

6

ERx-

Serial Ports

The serial ports use DB 9 connectors. Each port can be configured
by software for RS-232, RS-422, or RS-485. The pin assignments
for the ports are shown in the following table:

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

---

---

---

SD Slot

The W321/341 has an internal SD slot for storage expansion. The
SD slot allows users to plug 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 mem ory space. Use a screw driver to remove the SD slot
cover to access the slot. The slot is located on the right panel of the
W321/341. Plug the SD memory card directly into the socket, and
then replace the SD slot cover. The SD card will be mounted at
/mnt/sd. To remove the SD card from the slot, gently pu sh the

SD card further into the slot and then remove the pressure to allow
the card to spring out. You may then remove the card.

DI/DO

The W321 comes with 4 digital input channels and 4 digital outp ut
channels. The DI/DO connectors is an array of five pairs of p in
headers located on the right side of the computer. See the
following figures for pin assignments.

Console Port

The serial console port is a 4 pin header RS-232 port. It is des igned
for serial console terminals, which are useful for viewing boot-up
messages. Use the CBL-4PINDB9F-100 cable included w ith the
product to connect a PC to the W321/341’s serial console port.

Reset

Press the Reset button and hold it in for at least 5 seconds to load
the factory default configuration. After killing all running pr ocesses,
the system will take several seconds to synchronize its software to
factory defaults. After the default configuration has been reloaded,
the system automatically reboots. The Ready LED will blin k on and
off for the first 5 seconds, and then maintain a steady glow once
the system has rebooted.

Real-time Clock

The W321/341’s real-time clock is powered by a lit hium batter y.
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.

ATTENTION

There is a risk of explosion if t he

lithium batter y is

replaced

with an incompat ible battery.

6. Powering on the W321/341

To power on the W321/341, install the
terminal-block-to-power-jack converter on the W321/341’s DC
terminal block (located on the left rear panel), and then connect
the power adaptor . Note that the ground/earthing wire should
connect to the rightmost pin of the terminal block. It takes about
30 seconds for the system to boot up. Once the system is fully
booted the Ready LED will light up.

7. Connecting the W321/341 to a PC

There are two ways to connect the W321/341 to a PC:

(1) through the serial console port, or

(2) by SSH console over the networ k.

The COM settings for the serial console port are: Baudrate =

115200 bps, Parity = None, Data bits = 8, Stop bits = 1,
Flow Control = None.

ATTENTION

Use the CBL

-4PINDB9F-100 cable include d with the

product to connect a PC

to the W321/341’s serial console

port. Remember to choose VT100 terminal type.

To access the SSH console, you will need to know the W321/341’s
IP address and netmask. The default LAN settings are shown below.
For first-time configurations you may find it con venient to use a
crossover Ethernet cable to connect directly from the PC to the
W321/341.

Default IP Address

Netmask

LAN 1

192.168.3.127

255.255.255.0

LAN 2 (wireless)

192.168.4.127

255.255.255.0

Once the W321/341 is powered on, the Read y LED will ligh t up
and a login page will open. Use the following default username and
password to proceed. The defaults are:

Login: root
Password: root

8. Configuring the Ethernet Interface

To configure the Ethernet inter face, use the f ollowing commands.
Please note that etho0 stands for the IP address of the LAN port,
wlan0 stands for the IP address of the wireless LAN.

ifconfig eth0 192 .168.3.127
ifconfig wlan0 192.168.4.127

NOTE

Refer to the W321/341 User’s Manual for information on
how to configure the WLAN interface, and for other
configuration information.