Wilkerson Instruments DR9021 Wireless Point-to-Point Receiver

Receives signals from the Wilkerson Instruments DR9011 transmitter and reconstructs analog and switch signals.

Features

  • Frequency:
    • 915 MHz 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: 10/S
  • Range / Line of Sight
    • 915 MHz Band - Up to 20 Mi.
    • 2.4 GHz Band - 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)
    • 2.4GHz Band: 50 mW (17dBm)
  • Analog Output: Dual 4/20 mADC, 12 VDC Compliance
  • Digital Output:
    • Four Optically Isolated
    • Open Collector NPN Transistors
    • 30 VDC Max Voltage,
    • 30 mA Max Current (Operates in Saturated Mode)

The Wilkerson Instruments DR9021 wireless point-to-point receiver receives signals from the Wilkerson Instruments DR9011 transmitter and reconstructs the analog signals as 4-20 mA outputs. When the transmitter has a dual channel input, the DR9021 has a 4-20 mA output for each channel. If the transmitter has a single channel analog input, the DR9021 provides two 4-20 mA outputs proportional to the single input.

Switch outputs are provided as discrete open collector NPN transistors. A DIP switch on the Wilkerson Instruments DR9021's PC board allows selection of normal acting or reverse acting (failsafe) outputs. Three radio modules are available, 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 Wilkerson Instruments DR9021's PC board is used to set the hopping sequence. With proper antenna and cable selection and a 915MHz band version radio, the DR9021 can receive from a DR9011 up to 20 miles away. The DR9021 provides isolation between the output and the power source. 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.