MOXA AWK-3121B Series Wireless Bridge Installation Guide

: June 4, 2024
: MOXA

Table of Contents

Overview
Installation and Configuration
Panel Layout of the AWK-3121B
Wall Mounting (optional)
DIN-Rail Mounting (Optional)
Connecting the Power Supplies
Communication Connections
RS-232 Console Connection
LED Indicators
Specifications
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

AWK-3121B Series Wireless Bridge
Installation Guide

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 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 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.

Step 3: Set up the computer’s IP address
Set an IP address for the computer so that it is on the same subnet as that of the AWK-3121B. Since 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 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 to access 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
B for 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 the 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 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.

Panel Layout of the AWK-3121B

1A N-type antenna port
1B N-type antenna port
Model name
LEDs
4-pin male M12 A-coded connector for PWR-1 and PWR-2
10/100/1000BaseT(X) 8-pinM12 X-coded female connector for LAN1
Grounding screw
RJ45 RS-232 console
Reset button

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.

M4 screws specification for Wall Mounting Kit:

MOXA AWK 3121B Series Wireless Bridge - Wall Mounting
2

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 the wall, insert the four screw heads through the large opening of the 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.

MOXA AWK 3121B Series Wireless Bridge - Wall Mounting
4

DIN-Rail Mounting (Optional)

The DIN-rail mounting method is used in industrial or railway applications. 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 DIN-Rail Mounting Kit:

MOXA AWK 3121B Series Wireless Bridge - Wall Mounting
6

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 AWK-3121B from the DIN rail, simply reverse Steps 2 and 3.

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.

Wiring Requirements

WARNING
Safety First!
Be sure to disconnect the power cord before installing and/or wiring your AWK- 3121B.

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.

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.

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.

You can 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.

ATTENTION
The equipment is intended to be supplied by an external power source (UL listed / IEC 60950-1 / IEC 62368-1) whose 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 (including power cords and plug assemblies) provided with the unit is certified and suitable for use in your country.

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.

ATTENTION
This product is intended to be mounted to a well-grounded mounting surface, such as a metal panel.

Connecting the Power Supplies

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-

Communication Connections

10/100/1000BaseT(X) Ethernet Port Connection
The AWK-3121B has a 10/100/1000BaseT(X) Ethernet port (LAN1 8pin 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 cross-over), and the type of Ethernet cable used (straight-through or 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-
5	DD+	–
6	DD-	–
7	DC-	–
8	DC+	–

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 AWK-3121B for console configuration.

Console Pinouts for 10-pin or 8-pin RJ45

10-Pin Description 8-Pin

LED Indicators

The front panel of the AWS-3121B contains several LED indicators.
The function of each LED is described in the table below:

LED	Color	State	Description
PWR1	Green	On	Power is being supplied (from power input 1)
Off	Power is not being supplied
PWR2	Green	On	Power is being supplied (from power input 2)
Off	Power is not being supplied
FAULT1	Red	On	The system is booting up

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 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
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 the 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 provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance.

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 the factory to match the intended destination. The firmware setting is not accessible by the end user.

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| R345 connector for RS-232 serial console
Reset| Present
| PWR, FAULT, STATE, WLAN, LAN 1, LAN 2
Physical Characteristics
Housing| Metal
Weight| 2.0 kg
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)
Time| xxx, xxx hrs.
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 23 cm away from the human body. AWK-3121B is NOT designed for the general public. To establish a wireless network safely using AWK-3121B, a well- trained technician should be consulted for installation.

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 lightning protection or a surge arrest system.