RFScada 4ADI-5DO3 units provide high-reliability, long-range, bi-directional wireless transmission/reception systems for remote monitoring and controlling of discrete signals. The states of four contact or logic level inputs, plus four 4-20mA / 0-10VDC / 0-5VDC analog or digital inputs are transmitted from every unit. Each 4ADI-5DO3 unit also has 5 relay contact outputs.

Internal Antenna
UHF with Whip Antenna
External Antenna with Surge Arrestor

A common system is comprised of 1 to 255 RFScada units, and simple configuration at the factory or in the field allows every output on each unit to be driven from any input on any unit for maximum flexibility. Each unit's Modbus capability is also standard for additional control and monitoring options. The RFScada 4ADI-5DO3 is well suited for SCADA, oil, gas, water, security and other industrial applications.

The RFScada 4 is designed for high-reliability applications, including oilfield tanks, pumps, lift stations, wells, access control, and monitoring. The units provide a cost-effective, alternative solution to overhead or buried cables when connecting to equipment in isolated or inaccessible, remote locations.

Unlike competing models, the RFSCADA devices maintain continuous, encrypted bi-directional communications. This results in the positive verification of correct operation in all units, plus immediate indication of control and monitoring status at every unit. No more guesswork is needed – other models in the field can let you down. Don't have unknowns or failures caused by "report on exception" and "one-way transmit" type units.


  • Up to 252 digital inputs, 252 relay outputs, 252 analog inputs and 248 analog outputs per system. This means you can configure the unit to route any input to any output.
  • Quickly and easily add wireless I/O to existing systems. The 4ADI is compatible with virtually all SCADA systems, with analog, digital and computer interfacing. The unit is easily expandable in the field to meet future requirements and upgrades.
  • High-reliability industrial-grade with wide temperature range components.
  • Fully bi-directional and continuous signal exchange ensures each unit is capable of controlling, monitoring, and verifying signals at all other units – continuous, positive verification of correct operation.
  • Out-of-the-box plug and play operation, preconfigured to your application and needs. Duplicate remote relays, switches and analog signals without interconnecting wires.
  • The 4ADI-5DO3, 8ADI-9DO AND 16ADI-9D2AO can all communicate. Mix the Data Delivery Device units you need to build a complete system.
  • Any unit can be a repeater. Multiple repeater branches and levels may be configured for applications such as pipelines.
  • All units revert to known state upon failure or communication loss – either local or remote – within seconds.
  • Easy to use custom surface-mount design increases reliability, flexibility, cost and saves space.
  • Modbus configuration, monitoring and control is integrated. RS-232 and RS-485 interfaces are standard.
  • LED and additional relay output indicates the system state and verified communication status.
  • Dual power supply standard (115 Volts AC or 10- to 28-Volts DC).
  • Very long range, non-line-of-sight capabilities with several radio options available.
  • Completely pre-packaged solution in a corrosion-resistant NEMA 12 enclosure that is ready to be installed. Installation requires power and signal connection for operation. Most applications will not require an external antenna.
  • Spread-spectrum ISM version uses the 900MHz band at 1 Watt of power – the legal limit in the United States. This provides much greater range and vastly improved interference rejection than the short-range, congested 2.4GHz consumer band.
  • 1-, 2- and 5-Watt VHF and UHF versions available for extreme range, non-line-of-sight applications.
  • Spread-spectrum ISM versions require no license of ownership or operation in the United States. Fully FCC approved.
  • VHF and UHF versions require an FCC license. Let Data Delivery Devices assist with obtaining a license.
  • Highest data integrity with encrypted, secure error-rejecting data communication methods to prevent false signals.
  • LED's indicate every input contact state, every output relay state, RF transmit, RF receive and system/Modbus activity.
  • Integrated control routines for common applications often eliminate the need for additional control logic, PLC or computer.
  • Approximately half the cost of the closest competitive units, and often cheaper than wire.
Call Data Delivery Devices for additional options and custom control routines.


  • 8x Configurable Analog Inputs. Each may be set for 4-20mA, 0-10V, Digital or Pulse
  • 8x Switch / Contact Inputs
  • 115 Volts AC or 10 to 28 Volts DC Power In
  • 14 Volts DC Power Out for External Radio
  • RS-485 Serial Port for External Radio or Network
  • RS-232 Serial Port for External Radio or Network
  • 1 Relay System State Output
  • 8x Relay Outputs
  • 2x 4-20mA Analog Outputs
  • RS-485 Serial Port for PC / Modbus
  • RS-232 Serial Port for PC / Modbus