The Wilkerson Instruments DR9051R wireless signal transmitter is a polling RF transmitter that will accept
both analog and switch contact inputs. A 12 bit A/D converter is used to digitize the analog data. Analog
data and switch status is read when requested by the companion DR9050 Control Unit. The DR9050 polls the
DR9051R wireless signal transmitter and outputs the data in Modbus RTU format. A single DR9050 can poll up
to 247 DR9051R's utilizing a single Hop sequence.
The DR9051R wireless signal transmitter from Wilkerson Instruments has a repeater capability that is useful
for data monitoring in areas where the DR9050 cannot communicate directly with a DR9051R due to distance or
obstructions in the transmission path. The switch inputs require a standard contact closure or an open
collector NPN transistor.
Three radio modules are available for the Wilkerson Instruments DR9051R wireless signal transmitter, 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.
With proper antenna and cable selection and a 915MHz band version radio, the DR9051R wireless signal transmitter
can transmit up to 20 miles. The 2.4GHz band version can transmit up to 10 miles. The DR9051R provides isolation
between input and power source. The DC inputs are individually isolated. This isolation makes the DR9051R wireless
signal transmitter useful for measuring input signals with high common mode voltages and for breaking ground
connections to eliminate ground loops.
There are three types of inputs available to the Wilkerson DR9051R wireless signal transmitter - dual DC, bridge,
and RTD. Please refer to the data sheets for further information.
