NETio: Analog and Digital I/O

The NETio™ is an integrated and scalable family of Wireless I/O communication and IP networking transceivers that allow users to interface both analog and digital I/O; including sensors for pressure and flow as well as controls for pumps or alarms. NETio™ can wirelessly generate I/O signals or use standard IP/Ethernet and serial protocols to communicate with controllers such as PLCs, RTUs, and SCADA systems.

NETio Benefits:

  • Direct connectivity to analog and digital devices without the need for a controller
  • Unlicensed long range communication of IP/Ethernet or serial data
  • Supports multiple industry-standard protocols including Modbus TCP and DNP3
  • Reduces the high cost of wiring and terminations
  • Reduces integration, configuration, and support costs found with multi-box solutions
  • Seamless connectivity to network access points
  • Industrially hardened: Operation from -40ºC to 70ºC, Class 1 Div 2 hazardous location approval, fully-isolated I/O
  • Application Flexibility
    • Handles diverse I/O configurations including analog 4-20 mA, 0-5 V or 0-10 V and digital 5-36 VDC
    • Long range Wireless communication up to 30 miles (900 MHz) and 15 miles (2.4 GHz)
    • Wirelessly expand I/O coverage 3,000 feet using the 802.15.4 wireless option
    • IP/Ethernet, serial, and I/O functions simultaneously on the same network
    • Backwards compatible with entraNET and TransNET networks
  • Reliable and Scalable
    • License-free spread spectrum technology in both 900 MHz and 2.4 GHz bands
    • Point-to-Multipoint, 2-way communication
    • High receive sensitivity for noisy environments and long distances
    • Handles multiple industry protocols including Modbus, Modbus-TCP, and DNP3
  • Secure
    • Authorized access point and remote lists prevent unauthorized access
    • Password protected access and lock down
    • Built-in 128-bit encryption

Protocol Addressability:

NETio™ interfaces I/O from sensors and devices using multiple industrial protocols including Modbus RTU, Modbus TCP and DNP3. This allows a SCADA system or host controller to communicate directly with NETio using IP/Ethernet or serial protocols when PLCs and RTUs are not necessary. NETio allows serial communication using DNP3 or Modbus RTU without the need for an access point for simple point-to-multipoint applications between remotes or over WeXP.

I/O Extension:

Using I/O extension, NETio regenerates analog and digital signals between multiple field devices and controllers resulting in significant savings on wiring and termination costs. NETio supports cost-effective remote to remote communication for small point-to-point or point-to-multipoint requirements that do not require an access point.


NETio is available in the 900 MHz or 2.4 GHz frequency bands for IP/Ethernet and serial communication. Each NETio has built-in connections for one analog input, one analog output, two digital inputs, and two digital outputs. Each NETio can be configured for multiple operating modes; including I/O extension for regenerating I/O signals between devices, protocol address-ability for interfacing I/O using industry-standard protocols (Modbus-TCP), and SCADA communications to remote RTUs and PLCs using IP/Ethernet and a NETio Access Point.

Expansion Module:

Expansion Modules expand the number of I/O points to meet your requirements. Expansion modules can be connected directly to the NETio via a fully integrated power/communication back-plane connector or they can be located up to 3,000 feet away and wirelessly connect to NETio over WeXP. Expansion Modules are available in 6 different configurations and deliver connectivity for up to 128 I/O signals at any one location.

For More Information Call Access Technologies

(505) 341-0202