Point To Point,Transceiver,sensoRAD,DR9031-03,Wilkerson Instrument

Point To Point Transceiver sensoRAD™ DR9031-03

Point To Point Transceiver

DR9031-03Point To Point,Transceiver,sensoRAD,DR9031-03,Wilkerson Instrument


Point To Point,Transceiver,sensoRAD,DR9031-03,Wilkerson Instrument


  • Two DR9031 products make a bi-directional acquisition and control system
  • Send and Receive Data in Both Directions
  • Inputs Available For DC Voltage or DC Current, RTD, or Bridge
  • Dual DC Voltage or Current Inputs—Individually Isolated
  • Bridge Input Provides Precision 10VDC Excitation For 4 Bridges
  • Four Digital Inputs For Contact Closure or NPN Transistor Status
  • Dual 4-20mA outputs
  • Four Optically Isolated NPN Transistor Digital Outputs
  • Each DR9031 can have different analog inputs
  • Plug-In Terminals - DIN Rail Mount - Steel Clip
  • Line of Sight Range to 20 Miles With 915MHz Band Radio
  • Line of Sight Range to 10 Miles With 2.4GHz Band Radio
  • 915MHz ISM* Band - 2 Versions, 14 Hop Sequences
  • 2.4GHz ISM* Band - 1 Version, 7 Hop Sequences
  • Spread Spectrum, Frequency Hopping Technology*
  • 5 Year Warranty (1 Year on Radio Module)


The DR9031 is a 2-way wireless transceiver set which will send 1 or 2 analog channels and 4 digital switch status channels in both directions.

The transmitter input will accept both analog and switch contact inputs. The switch inputs require a standard contact closure or an open collector NPN transistor.

Dual channel DC voltage or current inputs are available. Each channel may be different.

Single channel RTD and Bridge inputs are available. The RTD input accepts 100 ohm platinum, 2 or 3 wire sensors. The Bridge input provides a precision 10VDC excitation supply that will drive four 330 ohm bridges in parallel to provide an average output from the 4 sensors.

The DR9031 provides isolation between analog inputs and power source. The DC Inputs are individually isolated. This isolation makes the product useful for measuring input signals with high common mode voltages and for breaking ground connections to eliminate ground loops.

RTD and Bridge sensors are inherently isolated, therefore the input circuits are only isolated from the power source.

A 12 bit A/D converter is used to digitize the analog data. Analog data and switch status is then transmitted to the companion DR9031 Receiver where the analog signal and switch status is reconstructed.

Dual channel input analog data is reconstructed as dual 4/20mA outputs. Single channel analog inputs are reconstructed as two 4/20mA outputs proportional to the input.

Switch status output is 4 optically isolated NPN transistors.

Three radio modules are available for the DR9031, two 915MHz band versions with 7 Hop sequences each and a 2.4GHz band version with 7 Hop sequences. They use spread spectrum, frequency hopping* technology. These choices provide 21 different Hop sequences that allow 21 systems to work in the same locale without interfering with each other.

A DIP Switch on the Transmitter PC board is used to set the Hop sequence.

With proper antenna and cable selection and a 915MHz band version radio, the DR9031 can transmit up to 20 miles. The 2.4GHz band version can transmit up to 10 miles.

Screw terminal blocks that plug into the case allow easy wiring and removal of products.

All of the DR Series of products provide transient protection to help eliminate damage from lightning and from other transients created on the power and signal leads.



Dual DC Voltage or Current


  • Min Span = 1mA
  • Max Span = 50 mA


  • Min Span = 100 mV
  • Max Span = 150 V


  • ±0.1% of span


  • ±0.05% of span

Strain Gauge


  • 0.5 mV/V to 1000 mV/V


  • ±0.1% of Span


  • ±0.01% of Span


  • 10 VDC Precision Supply for up to 4 Strain Gauges 125 mA Maximum


  • 100 Platinum, 2 or 3 Wire .00385 or .00392 Alpha


  • -200 to +850C Maximum 15C Span Minimum


  • ±0.05% of Span


  • ±0.05% of Span

    Open Sensor

  • Full Scale


  • 100 dB, DC to 60 Hz

Switch Input

    Open Circuit Voltage

    Equals Power Input

  • 12 to 24 VDC

    Closed Circuit Current

  • 4 to 8 mADual DC


  • -13°F to 167°F/-25°C to 75°C


  • ±(0.01% of span)/°C max



  • Dual 4/20 mADC
  • 12 VDC Compliance

Digital Four Optically Isolated

Open Collector NPN Transistors

30 VDC Max Voltage,

30 mA Max Current Operates in Saturated Mode



  • 915 Band
  • 908 or 922 MHz
  • 2.4 GHz Band

    (2.4000 - 2.4835 GHz)

Spread Spectrum Type

  • Frequency Hopping, Direct FM

I/O Data Rate Tx to Rx:

  • 9600 bps

    Update Rate

  • Approximately 8/S

Range (Line of Sight)

  • 915 MHz Band -- Up to 20 Mi.
  • 2.4 GHz -- Up to 10 Mi.

Receiver Sensitivity:

    915 MHz Band

  • -110 dBm @ 9600 baud

    2.4 GHz Band

  • -105 dBm @ 9600 baud

Transmitter Power:

    915 MHz Band

  • 100 mW (20 dBm)

    2.4 GHz Band

  • 50 mW (17dBm)


  • Reverse Polarity SMA Female


  • FCC Part 15.247


  • -15°F to 160°F
  • -25°C to 70°C


  • 12 or 24 VDC
  • 1.5 Watts Max