Moxa Technologies AWK-3121B Series User manual

AWK-3121B Series
QuickInstallation Guide
Version 1.4,SEP 2022
Technical Support Contact Information
www.moxa.com/support
2022Moxa Inc. All rights reserved.

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Overview
The AWK-3121B wireless AP/client is the ideal rugged wireless solution
for railway onboard/wayside and train-to-ground applications such as
CCTV and CBTC communications. It can provide speeds of up to 300
Mbps with IEEE 802.11n technology. The AWK-3121B's can operate at
temperatures ranging from -40 to 75°C and meet the requirements of
the EN 50155/50121 regulations.
Package Checklist
The AWK-3121B is shipped with the following items:
•1 AWK-3121B
• Quick installation guide (printed)
• Product warranty statement
If any of these items is missing or damaged, contact your customer
service representative for assistance.
Installation and Configuration
Before installing the AWK-3121B, make sure that all items in the
package checklist are included in the box. In addition, you will need
access to a notebook computer or PC equipped with an Ethernet port.
The AWK-3121B has a default IP address that you must use when
connecting to the device for the first time.
Step 1: Select the power source
The AWK-3121B can be powered by a DC power input.
Step 2: Connect the AWK-3121B to a notebook or PC
Since the AWK-3121 is provided with the MDI/MDI-X auto-sensing
capability of Ethernet connection,you can use either a straight-through
cable or crossover cable to connect it to a computer. When the
connection between the AWK-3121B and the computer is established,
the LED indicator on the AWK-3121B's LAN port lights up.

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Step 3: Set up the computer’s IP address
Set anIPaddress for thecomputer sothat it ison thesame subnet as
that of the AWK-3121B.Since the AWK-3121B’s default IP address is
192.168.127.253, and the subnet mask is 255.255.255.0, set the IP
address of the computer in the 192.168.127.xxx IP range and subnet
mask to 255.255.255.0.
Step 4: Use the web-based manager to configure the
AWK-3121B
Open your computer’s web browser and type
http://192.168.127.253 in the address field toaccess the homepage
of the web-based manager.Enter the Username and Password to
open the AWK-3121B homepage. If you are configuring the AWK-3121
Bfor the first time, enter the following default Username and Password
and click on the Login button:
Username: admin
Password: moxa
ATTENTION
For security reasons, we strongly recommend changing the
password after first access. To change the password, select
Maintenance Password and follow the on-screen
instructions.
Step 5: Select the operation mode for the AWK-3121B
By default, the operation mode of the AWK-3121B is set to AP. You
can change this setting to Client mode on the Wireless Settings 
Basic Wireless Settings page.
NOTE You must either click the Save Configuration or the Restart
button for the configuration changes to be effective.

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Panel Layout of the AWK-3121B
1. 1A N-type antenna port
2. 1B N-type antenna port
3. Model name
4. LEDs
5. 4-pin male M12 A-coded
connector for PWR-1 and
PWR-2
6. 10/100/1000BaseT(X) 8-pin
M12 X-coded female
connector for LAN1
7. Grounding screw
8. RJ45 RS-232 console
Reset button 9.
Wall Mounting (optional)
In most applications, wall mounting the AWK-3121Bis the most
commonly used method, which makes installation easier as illustrated
below:
STEP 1:
Attach the wall-mounting plates with the M4 screws in the
accessory package.

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STEP 2:
Mounting the AWK-3121B to a wall requires 4 screws. Use
the AWK-3121B device, with wall-mounting plates
attached, as a guide to mark the correct locations of
the 4 screws. The heads of the screws should be 6.0
mm in diameter, and the shafts should be less than 3.5
mm in diameter, as shown in the figure at the right.
Do not drive the screws in all the way—leave a space of about 2 mm to
allow room for sliding the wall-mount panel between the wall and the
screws.
NOTE Test the screw head and shank size by inserting the screw into
one of the keyhole shaped apertures of the wall-mounting
plates before driving the screws into the wall.
STEP 3:
Once the screws are driven into thewall, insert the four screw heads
through the large opening ofthe keyhole-shaped apertures in the wall-
mount plates,and then slide the AWK-3121B downwards, as indicated
to the right. Tighten the four screws for added stability.
DIN-Rail Mounting (Optional)
The DIN-rail mounting method is used in industrial or railway
application. You will require a DIN-rail attachment plate, which is an
optional accessory, to mount the AWK-3121B to a DIN rail. When
you attach the DIN-rail attachment plate to the AWK-3121B, make
sure that the stiff metal spring is
situated towards the top as shown
in the following instructions:
STEP 1:
Attached the DIN-rail mounting plates to the AWK-3121 B with the
M4 screws in the accessory package.
M4 screws specification for Wall Mounting Kit:

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WARNING
•This equipment is intended to be used in a Restricted
Access Location, such as a dedicated computer room where
access can only be gained by SERVICE PERSONS or by
USERS who have been instructed about the fact that the
metal chassis of the equipment is extremely hot and may
cause burns.
•Access to the equipment should be controlled through the
use of a lock and key or a security identification system,
controlled by the authority responsible for the location.
Only authorized, well-trained professionals should be
allowed to access the restricted access location.
•Service persons or users must pay special attention and
take special precautions before handling this equipment.
External Metal Parts are Hot!
• Use adequate protection before handling this device.
STEP 2:
Insert the top of the DIN rail into
the slot just below the stiff metal
spring.
STEP 3:
The DIN-rail attachment unit will
snap into place as shown in the
figure below:
To remove the AWK-3121B from the DIN rail, simply reverse Steps 2
and 3.
M4 screws specification for DIN-Rail Mounting Kit:

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ATTENTION
The equipment is intended to be supplied by external power
source (UL listed / IEC 60950-1 / IEC 62368-1) which output is
complied with ES1 (SELV for IEC 60950-1), PS2/LPS, output
rating 24 Vdc, min. 0.789 A, ambient temperature 75 °C
minimum.
ATTENTION
Make sure the external power adapter (includes power cords
and plug assemblies) provided with the unit is certified and
suitable for use in your country.
•Youcan use the type of signal transmitted through a wire to
determine which wires should be kept separate. The rule of thumb
is that wiring with similar electrical characteristics can be bundled
together.
•Keep input wiring and output wiring separate.
•It is strongly advised that you label wiring to all devices in the
system for easy identification.
NOTE Do not run signal or communications wiring and power wiring in
the same wire conduit. To avoid interference, wires with
different signal characteristics should be routed separately.
Wiring Requirements
You should also pay attention to the following items:
•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.
WARNING
Safety
First!
Calculate the maximum possible current in each power wire
and common wire. Observe all electrical codes that dictate
the maximum current allowed for each wire size.
If the current goes above the maximum ratings, the wiring
could overheat, causing serious damage to your equipment.
WARNING
Safety First!
Be sure to disconnect the power cord before installing and/or
wiring your AWK-3121B.

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ATTENTION
Before connecting the AWK-3121B to the DC power inputs,
make sure the DC power source voltage is stable.
Communication Connections
10/100/1000BaseT(X) Ethernet Port Connection
The AWK-3121B has a 10/100/1000BaseT(X) Ethernet port (LAN1 8-
pin shielded M12 X-coded connector). The 10/100/1000TX port
located on the front panel is used to connect to Ethernet-enabled
devices. Most users configure this port for Auto MDI/MDI-X mode, in
which case the port’s pinouts are adjusted automatically depending on
the type of Ethernet cable used (straight-through or cross-over), and
the type of device (NIC-type or HUB/Switch-type) connected to the
port.
Pinouts for the 10/100/1000BaseT(X) (M12 8-pin female X-
coded) port
Pin No. GbE Conn. FE Conn.
1 DA+ TD+
2 DA- TD-
3 DB+ RD+
4 DB- RD-
5DD+ –
6DD- –
7DC- –
8DC+ –
Grounding the Moxa AWK-3121B
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 devices.
Connecting the Power Supplies
The AWK-3121B supports two types of power supplies—PWR1 and
PWR2. The 4-pin male M12 A-coded connector on the AWK-3121B front
panel is used for the dual power inputs. You can use the metal M12
male 4-pin A-coded screw-type crimp circular connector with pins for
power connection included with the product or purchase the
M12 power cable (optional) CBL-M12(FF4P)/Open-BK-100-IP68 for lab
use/tests.
Pinouts for the power input (4-pin male M12 A-coded) port:
Pin No. Power Input
1 V1+
2 V2+
3 V1-
4 V2-
ATTENTION
This product is intended to be mounted to a well-grounded
mounting surface, such as a metal panel.

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LED Indicators
The front panel of theAWK-3121B contains several LED indicators.
The function of each LED is described in the table below:
RS-232 Console Connection
The AWK-3121B has one RS-232 (8-pin RJ45) console port on the front
panel. Use either an RJ45-to-DB9 or RJ45-to-DB25 cable to connect the
AWK-3121B console port to your PC’s COM port. You may then use a
console terminal program to access the AWK-3121B for console
configuration.
Console Pinouts for 10-pin or 8-pin RJ45
10-Pin Description 8-Pin

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Specifications
WLAN Interface
Standards IEEE 802.11b/g for Wireless LAN
IEEE 802.11i for Wireless Security
IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X)
IEEE 802.3ab for 1000BaseT
Spread Spectrum and
Modulation (typical)
•DSSS with DBPSK, DQPSK, CCK
•OFDM with BPSK, QPSK, 16QAM, 64QAM
•802.11b: CCK @ 11/5.5 Mbps, DQPSK @ 2
Mbps, DBPSK @ 1 Mbps
•802.11g: 64QAM @ 54/48 Mbps, 16QAM @
36/24 Mbps, QPSK @ 18/12 Mbps, BPSK @
9/6 Mbps
Operating Channels
(central frequency)
•US:
2.412 to 2.462 GHz (11 channels)
• EU:
2.412 to 2.472 GHz (13 channels)
•JP:
2.412 to 2.484 GHz (14 channels, DSSS)
Security • SSID broadcast enable/disable
•Firewall for MAC/IP/Protocol/Port-based
filtering
•64-bit and 128-bit WEP encryption, WPA/
WPA2 Personal and Enterprise (IEEE
802.1X/RADIUS, TKIP and AES)
Transmission Rates • 802.11b: 1, 2, 5.5, 11 Mbps
•802.11g: 6, 9, 12, 18, 24, 36, 48, 54
Mbps

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Transmitter Power 802.11b:
•Typ. 26±1.5 dBm @ 1 Mbps
•Typ. 26±1.5 dBm @ 2 Mbps
•Typ. 26±1.5 dBm @ 5.5 Mbps
•Typ. 25±1.5 dBm @ 11 Mbps
802.11g:
•Typ. 23±1.5 dBm @ 6 to 24 Mbps
•Typ. 21±1.5 dBm @ 36 Mbps
•Typ. 19±1.5 dBm @ 48 Mbps
•Typ. 18±1.5 dBm @ 54 Mbps
Receiver Sensitivity 802.11b:
• -93 dBm @ 1 Mbps
• -93 dBm @ 2 Mbps
• -93 dBm @ 5.5 Mbps
• -88 dBm @ 11 Mbps
802.11g:
• -88 dBm @ 6 Mbps
• -86 dBm @ 9 Mbps
• -85 dBm @ 12 Mbps
• -85 dBm @ 18 Mbps
• -85 dBm @ 24 Mbps
• -82 dBm @ 36 Mbps
• -78 dBm @ 48 Mbps
• -74 dBm @ 54 Mbps
FEDERAL COMMUNICATIONS COMMISSION INTERFERENCE STATEMENT
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.
CAUTION:
Any changes or modifications not expressly approved by the grantee of this device
could void the user's authority to operate the equipment.
The availability of some specific channels and / or operational frequency bands are
country dependent and are firmware programmed at factory to match the intended
destination. The firmware setting is not accessible by the end user.
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.
RF Exposure warning
This equipment must be installed and operated in accordance with provided
instructions and the antenna(s) used for this transmitter must be installed to provide a
separation distance of at least 23 cm from all persons and must not be co-located or
operating in conjunction with any other antenna or transmitter. End-users and
installers must be provide with antenna installation instructions and transmitter
operating conditions for satisfying RF exposure compliance.

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Protocol Support
General Protocols Proxy ARP, DNS, HTTP, HTTPS, IP, ICMP, SNTP,
TCP, UDP, RADIUS, SNMP, DHCP
AP-only Protocols ARP, BOOTP, DHCP
Interface
Connector for
External Antennas
N-type (female)
Fiber Ports 1, 100/1000Base SFP slot
LAN Ports 1, M12-type, 8-pin female X-coded,
10/100/1000BaseT(X) auto negotiation speed,
F/H duplex mode, and auto MDI/MDI-X
connection
Console Port RJ45 connector for RS-232 serial console
ResetPresent
PWR, FAULT, STATE, WLAN, LAN 1, LAN 2
Physical Characteristics
Housing Metal
Weight2.0 kg
Professional installation
This is a specific product that requires professional installation and configuration, must
be performed by trained technical engineers to install the antenna, please contact
Moxa for further information.
The availability of some specific channels and / or operational frequency bands are
country dependent and are firmware programmed at factory to match the intended
destination. The firmware setting is not accessible by the end user.

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Installation Wall mounting (optional), DIN-rail mounting
(optional)
Environmental Limits
Operating
Temperature
-40 to 75°C (-40 to 167°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative
Humidity
5% to 95% (non-condensing)
Power Requirements
Input Voltage 24VDC, dual DC power input
Input Current 0.789 A (max.) @ 24 VDC
Connector 4-pin male M12 A-coded connector
Reverse Polarity
Protection
Present
Standards and Certifications
Safety UL 60950-1, IEC 62368-1(CB), LVD EN 62368-1
EMC EN 61000-6-2/6-4
EMI CISPR 22, FCC Part 15B Class B
EMS IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 20 V/m
IEC 61000-4-4 EFT: Power: 2 kV; Signal: 2 kV
IEC 61000-4-5 Surge: Power: 2 kV; Signal: 2 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8
Radio EN 300 328, TELEC, FCC
Rail Traffic EN 50155*, EN 50121-4
Fire and Smoke EN 45545-2
*This product is suitable for rolling stock railway applications, as defined by the EN
50155 standard. For a more detailed statement, click here:
www.moxa.com/doc/specs/EN_50155_Compliance.pdf
MTBF (mean time between failures)
Timehrsxxx,xxx .
Warranty
Warranty Period 5 years
Details See www.moxa.com/warranty
ATTENTION
The AWK-3121B is NOT a portable mobile device and should be
located at least 23cm away from the human body. The
AWK-3121B is NOT designed for the general public. To establish
a wireless network safely using the AWK-3121B, a well- trained
technician should be consulted for installation.

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ATTENTION
Use the antennas correctly: The 2.4 GHz antennas are needed
when the AWK-3121B operates in IEEE 802.11b/g. Make sure
your antenna installation is within a safe area, which is
covered by a lightning protection or surge arrest system.