AWK-3121 Series

Industrial IEEE 802.11a/b/g wireless AP/bridge/client

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Evaluation units available for online purchase
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Note: The AWK-3121 series is being phased out. The phase out period is August 4, 2016, to May 4, 2017. Last buy orders must be received before April 4, 2017. The recommended replacement product is the AWK-1131A. Please contact your Moxa sales representative if you have further questions.


Features and Benefits 

  • IEEE 802.11a/b/g compliant
  • QoS (WMM) and VLAN for efficient network traffic
  • Supports long-distance data transfer and client-based Turbo Roaming
  • Maximum security with WEP/WPA/WPA2/802.11X and powerful filters
  • -40 to 75°C operating temperature range (T models)


Looking for more benefits?

Our new AWK-1131A series offers the following additional benefits:

  • Fulfills high-bandwidth wireless application requirements with up to 300 Mbps data rate
  • Avoids downtime due to electrical interference with power and antenna port isolation
  • Comes in a compact size that fits various space-limited installations

Check out the AWK-1131A series product page for more information.



The AWK-3121 AP/bridge/client is ideal for industrial hard to wire applications, keeping wireless costs under control, and integrating with existing mobile equipment. The AWK-3121 is compliant with the industrial standards and approvals, covering operating temperature, power input voltage, surge, ESD and vibration. Installation is easy, with either DIN-Rail mounting or distribution boxes, and the DIN-Rail mounting capability, wide operating temperature range, and IP30 housing with LED indicators make the AWK-3121 a convenient yet reliable solution for any industrial wireless application.

Advanced Security 

  • 64-bit and 128-bit WEP (Wired Equivalent Privacy)
  • Enable/disable SSID broadcasts
  • WPA/WPA2 (Wi-Fi Protected Access) and 802.11i support
  • IEEE802.1X/RADIUS support
  • Powerful filters for access control

Specifications for Industrial-grade Applications 

  • Redundant DC power inputs
  • Long-distance data transmission over 10 km
  • Integrated DI/DO for on-site monitoring and warnings
  • Signal strength LEDs for easy deployment and antenna alignment

Patent Marking

White Paper:

Expert Tips for Optimizing Industrial Wireless Networks


Compared with its popularity in everyday commercial environments, Wi-Fi has been slow to gain a foothold in industrial M2M applications. One of the main reasons that industrial customers are reluctant to move from wired to wireless is the problems associated with stability. Wireless transmission is NOT as reliable as wired transmission. However, by following certain best practices it is possible to set up a wireless network that will provide the level of reliability needed for M2M communication applications. In this whitepaper, we present eight expert tips that you can follow to optimize your wireless networks for industrial application environments...more

WLAN Interface
Standards IEEE 802.11a/b/g for Wireless LAN
IEEE 802.11i for Wireless Security
IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseTX
IEEE 802.3af for Power-over-Ethernet*
IEEE 802.1D for Spanning Tree Protocol
IEEE 802.1w for Rapid STP
*Support for PoE discontinued starting with hardware Rev. 2.0.0.
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 @ 11 Mbps
• 802.11a/g: 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)
5.18 to 5.24 GHz (4 channels)
2.412 to 2.472 GHz (13 channels)
5.18 to 5.24 GHz (4 channels)
2.412 to 2.472 GHz (13 channels, OFDM)
2.412 to 2.484 GHz (14 channels, DSSS)
5.18 to 5.24 GHz (4 channels for W52)
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
802.11a/g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps
TX Transmit Power 802.11b:
Typ. 23±1.5 dBm @ 1 to 11 Mbps
Typ. 20±1.5 dBm @ 6 to 24 Mbps, Typ. 19±1.5 dBm @ 36 Mbps, Typ. 18±1.5 dBm @ 48 Mbps, Typ. 17±1.5 dBm @ 54 Mbps
Typ. 18±1.5 dBm @ 6 to 24 Mbps, Typ. 16±1.5 dBm @ 36 to 48 Mbps, Typ. 15±1.5 dBm @ 54 Mbps
RX Sensitivity 802.11b:
-97 dBm @ 1 Mbps, -94 dBm @ 2 Mbps, -92 dBm @ 5.5 Mbps, -90 dBm @ 11 Mbps
-93 dBm @ 6 Mbps, -91 dBm @ 9 Mbps, -90 dBm @ 12 Mbps, -88 dBm @ 18 Mbps, -84 dBm @ 24 Mbps, -80 dBm @ 36 Mbps, -76 dBm @ 48 Mbps, -74 dBm @ 54 Mbps
-90 dBm @ 6 Mbps, -89 dBm @ 9 Mbps, -89 dBm @ 12 Mbps, -85 dBm @ 18 Mbps, -83 dBm @ 24 Mbps, -79 dBm @ 36 Mbps, -75 dBm @ 48 Mbps, -74 dBm @ 54 Mbps
Protocol Support
Default Antennas 2 dual-band omni-directional antennas, 2 dBi, RP-SMA (male)
Connector for External Antennas RP-SMA (female)
RJ45 Ports 1, 10/100BaseT(X) auto negotiation speed, F/H duplex mode, and auto MDI/MDI-X connection
Console Port RS-232 (RJ45-type)
Reset Present
LED Indicators PWR1, PWR2, PoE (discontinued starting with Rev. 2.0.0), FAULT, STATE, signal strength, CLIENT MODE, BRIDGE MODE, WLAN, 10M, 100M
Alarm Contact 1 relay output with current carrying capacity of 1 A @ 24 VDC
Digital Inputs 2 electrically isolated inputs• +13 to +30 V for state “1”
• +3 to -30 V for state “0”
• Max. input current: 8 mA
Physical Characteristics
Housing Metal, providing IP30 protection
Weight 850 g
Dimensions 54 x 135 x 105 mm (2.14 x 5.4 x 4.14 in)
Installation DIN-Rail mounting, wall mounting (with optional kit)
Environmental Limits
Operating Temperature Standard Models: -25 to 60°C (-13 to 140°F)
Wide Temp. Models: -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 12 to 48 VDC, redundant dual DC power inputs or 48 VDC Power-over-Ethernet* (IEEE 802.3af compliant)
*Support for PoE discontinued starting with hardware Rev. 2.0.0.
Connector 10-pin removable terminal block
Power Consumption 12 to 48 VDC, 0.121 to 0.494 A
Reverse Polarity Protection Present
Standards and Certifications
Safety UL 60950-1, EN 60950-1
Hazardous Location UL/cUL Class I Division 2, ATEX Zone 2
EMC EN 301 489-1/17; FCC Part 15, Subpart B; EN 55022/55024
Radio EN 300 328, EN 301 893, TELEC, FCC ID SLE-WAPA003
Note Please check Moxa’s website for the most up-to-date certification status.
MTBF (mean time between failures)
Time 392,209 hrs
Warranty Period 5 years
Details See

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Available Models

  Model No. Description
AWK-3121-US IEEE 802.11a/b/g wireless AP/bridge/client, US band
AWK-3121-US-T IEEE 802.11a/b/g wireless AP/bridge/client, US band, -40 to 75°C operating temperature
AWK-3121-EU IEEE 802.11a/b/g wireless AP/bridge/client, EU band
AWK-3121-EU-T IEEE 802.11a/b/g wireless AP/bridge/client, EU band, -40 to 75°C operating temperature
AWK-3121-JP IEEE 802.11a/b/g wireless AP/bridge/client, JP band
AWK-3121-JP-T IEEE 802.11a/b/g wireless AP/bridge/client, JP band, -40 to 75°C operating temperature

Optional Accessories

Trial Software
  Model No. Description
MXview Industrial network management software designed for converged automation networks
Wireless Adaptor
  Model No. Description
A-ADP-RJ458P-DB9F-ABC01 RJ45-to-DB9 adaptor for the ABC-01
Automatic Backup Configurators
  Model No. Description
Automatic Backup Configurator ABC-01 Configuration backup and restoration tool for managed switches and wireless APs/Bridges/Clients
Wireless Antenna Cable
  Model No. Description
A-CRF-RMNM-L1-900 N-type (male) to RP SMA (male), LMR-195 Lite cable, 9 m
A-CRF-RMNM-L1-600 N-type (male) to RP SMA (male), LMR-195 Lite cable, 6 m
A-CRF-RMNM-L1-300 N-type (male) to RP SMA (male), LMR-195 Lite cable, 3 m
Wireless AP Mounting Kit
  Model No. Description
WK-51-01 Wall-mounting kit, 51mm wide
Wireless Terminating Resistor
  Model No. Description
A-TRM-50-RM Terminating Resistor, 50 ohm, RP-SMA Male
Surge Arrestor
  Model No. Description
A-SA-NMNF-01 Surge arrester, N-type (female) to N-type (male)
A-SA-NFNF-01 Surge arrestor, N-type (female) to N-type (female)
Wireless LAN Antennas
  Model No. Description
ANT-WDB-ARM-02 2.4/5.5 GHz 2 dBi dual-band antenna, RP-SMA (male) connector
ANT-WSB-ANF-09 2.4 GHz,omni-directional antenna, 9 dBi, N-type (female)
ANT-WSB-PNF-12 2.4GHz, Directional/Panel antenna, 12dBi, N-type (female) connector
ANT-WSB-PNF-18 2.4 GHz, panel antenna, 18 dBi, N-type (female)
ANT-WDB-ANF-0609 2.4/5 GHz, dual-band omni-directional antenna, 6/9 dBi, N-type (female)
ANT-WDB-PNF-1518 2.4/5 GHz, dual-band panel antenna, 15/18 dBi, N-type (female)
ANT-WSB5-ANF-12 5 GHz, omni-directional antenna, 12 dBi, N-type (female)
ANT-WSB5-PNF-18 5 GHz, panel antenna, 18 dBi, N-type (female)
ANT-WDB-ANF-0407 Dual-band omni-directional antenna: 4 dB at 2.4 GHz and 7 dB at 5 GHz
ANT-WSB-AHRM-05-1.5m 2.4 GHz, omni-directional/dipole antenna, 5 dBi

How to Isolate Wireless Interference? 

Download the white paper to learn more about Moxa's reliable Wi-Fi solution.

Isolation design is available on the new AWK-1131A series, visit product page.


Next Step
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