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Industrial IoT Cellular Smart Security Gateway
PoE 30W
Not available in North America
Microsoft Azure Sphere Security solution
PoE PSE 30W smart Modbus gateway
Edge to Cloud (Azure / AWS / Google)

Over the past few years, the Internet of Things (IoT) has captured headlines across the world. With its network of “Smart,” sensor-enabled devices that can communicate and coordinate with one another via the Internet, the IoT can facilitate computer-mediated strategies for managing city resources, energy management, and numerous other tasks. However, the way forward for IoT may be complicated. As with any technology in its early stages, cybersecurity concerns will be prevalent. There have already been instances of hackers wreaking havoc by infiltrating connected IoT devices.

In light of the essential need for security, EtherWAN’s AiR GUARD is an advanced IIoT cellular gateway and 4G LTE PoE device specifically optimized for secure IoT data transmission, running with Microsoft’s Azure Sphere. Offering not only secure connectivity, it also provides industrial protocols and easy to use data pre-processing and conversion for efficient and low-cost edge to cloud connectivity. AiR GUARD is your IoT guardian.

EtherWAN — "When Connectivity is Crucial."


Built-in Microsoft security technology

    • AiR GUARD's built-in Azure Sphere chip provides secure connectivity based on a hardware root of trust, and its OS adds layers of protection with continuous updates to ensure a trustworthy platform.

Highly-reliable network connection

    • Offers multiple internet access methods: 10/100 BASE-T(X) & Gigabit Ethernet; Global 3G/4G LTE Cat.4 networks

Convenient 30W PoE to power connected devices

    • Offers one port of 10/100/1000 BASE PoE
    • IEEE802.3at Power over Ethernet

Data processing and conversion ability

    • Built-in Data Tag Engine
    • Easy integration of equipment data into middleware with secured data conversion to optimize efficiency with connected equipment

Automatic OTA firmware upgrade

    • The ability to add new software features to a product after a device has been deployed in the field to improve functionality over time
    • The opportunity to rapidly respond to bugs and security updates

Supports RESTful API

    • Easy to acquire data or remote configure settings

Azure Sphere certified microcontroller

    • Azure Sphere MT3620

Hardware-based root of trust

    • Prevents device forgery or spoofing

Defense in depth

    • Multiple layers of security - each layer of soft-ware (Azure Sphere OS) verifies that the layer above it is secured

Certificate-based authentication

    • Signed certificates validated by cryptographic Key

Renewable security

    • Device software is automatically updated to correct known vulnerabilities or security breaches

IIoT Connectivity with Azure Sphere Security Service

    • Microsoft secures the Firmware with timely updates for 10 years
    • Protects your devices and your customers with certificate-based authentication of all devices and communication
    • Detects emerging security threats through automated processing of on-device errors

Frequency Bands Region Code Optional

 4G LTE3G2GRegion
TAB1(2100)/3(1800)/ 4(AWS)/5(850)/7(2600)/ 8(900)/28(700 APT)B40(2300)B1(2100)/2(1900)/ 5(850)/8(900)B2(1900)/3(1800)/ 5(850)/8(900)Taiwan & Australia
EAB1(2100)/3(1800)/5(850)/ 7(2600)/8(900)/20(800)B38(TD 2600)/40(TDV 2300)/ 41(TD 2500)B1(2100) / 5(850)/ 8(900)B3(1800)/8(900)EU & APAC*/ Singapore / Thailand


  • Standards
    • 4G LTE: FDD-LTE, TDD-LTE, Transfer rate (max): 
      • LTE FDD: 150Mbps down; 50Mbps up
      • LTE TDD: 130Mbps down; 35Mbps up
    • 3G: WCDMA, Transfer rate (max): 42Mbps down; 5.76Mbps up
    • 2G: GSM/EDGE, Edge Transfer rate (max): 236.8Kbps down & up
  • SIM Slot
    • 1 x nano SIM card slot
  • Antenna connector
    • 2 x SMA Female


  • Standards
    • IEEE 802.3 10BASE-T
    • IEEE 802.3u 100BASE-TX/100BASE-FX
    • IEEE 802.3ab 1000BASE-T
    • IEEE802.3at Power over Ethernet
  • Ports
    • 1 x 10/100/1000 PoE 802.3at PSE + 1x 100/1000 BASE-T(X) + 1 x 10/100BASE-T(X)


  • Ports
    • 2 x RS485


  • DI/DO
    • 1 x Digital In (“Logic 0”: 0-2V, “Logic 1”: 5-30V)
    • 1 x Digital Out (Relay Mode, up to 30V/1A)

Micro SD

  • Capacity
    • Max. Storage of 64GB

LED Indicators

  • System
    • Power , System status, LTE status , AZS (Azure Sphere) , COM 1, COM 2


  • Input
    • 12-24VDC
  • Power consumption
    • 18 Watts (without PoE active)


  • Casing Material
    • Metal case
  • IP Rating
    • IP30
  • Dimensions
    • 138 x 110 x 45mm (HxDxW)
  • Weight
    • 0.7Kg
  • Installation Type
    • DIN-Rail mounting

Environment Limits

  • Operating Temp.
    • -40 to 75°C (-40 to 167°F)
  • Storage Temp.
    • -40 to 85°C (-40 to 185°F)
  • Relative Humidity
    • 5% to 95% (non-condensing)

Regulatory Approvals

  • Safety
    • EN IEC 62368-1:2020+A11:2020
  • Emissions/Immunity
    • EU: CE
    • UK: UKCA
    • US: FCC part 15B
    • Taiwan: NCC
    • Singapore: IMDA
    • Thailand: NBTC
    • Australia: RCM


  • Cellular
    • 3GPP, 3G/4G
  • Ether-WAN
    • Dynamic IP, Static IP, PPPoE
  • Protocols
    • DHCP Server. LLDP
  • Port Forwarding
    • NAT, Virtual Server/Computer

Network Management

  • Configuration
    • Web Console, SSH, HTTPS
  • System
    • Firmware upgrade, configuration backup & restore, reboot & reset default
  • Diagnostic
    • Ping, Traceroute


  • VPN
    • OpenVPN:
      • Server / Client

Field Communication

  • Modbus
    • Modbus TCP, Modbus RTU Master
  • Data Interchange
    • MQTT Client
  • RESTful API
    • Easy to acquire data or remote configure settings
  • Data Tag Engine
    • Front-end device raw data to convert to be logical data by Tag based and specified Tag data format combination to the cloud.


  • OTA F/W upgrade automatically
    • Use Cellular or Ethernet WAN to update new version system firmware and Azure Sphere Security

4G LTE Gateway

AiR GUARD-TAIndustrial IoT Cellular Smart Security Gateway4G LTE Cat.4Taiwan & Australia
AiR GUARD-EAIndustrial IoT Cellular Smart Security Gateway4G LTE Cat.4EU & APAC* / Singapore / Thailand