The QTech QDR are low power radios that provide wireless RS232 or RS485 serial cable replacements.
The QDRs are lower power and more cost effective than conventional radio systems. They use a sophisticated digital modulation technology, have an outstanding receiver sensitivity and can operate at up to 9600bps data rate.
QDRs are ideal for transmitting instrumentation signals or concentrating several remote sensors into a central control room. The QDRs can also be used with the DATRAN telemetry system to connect extra I/O modules to the RTU instead of using serial cables.
The QDR radios are powered from our range of DC power supplies including plug packs and power packs.
Workbench is the software application used to configure the QDR radios via USB.
The QDRs can be configured in Point to point, point to multipoint and repeater configurations. This helps extend the system design options and increase the potential transmission range. The radios also have “radio ID” settings – these settings tie the QDR modules to a specific customer and a specific system. This helps ensure security and you can use multiple radios all in the same area.
The design for this Water Treatment Plant telemetry system used eight of our 900MHz QDR digital radios in a point to multipoint RS485 configuration.
We have a selection of high gain antennas compatible with the QDR, these give you options to increase the range to several kilometres. In the Water Treatment Plant design above, the master QDR in the control room used the 6dB whip antenna and all the bore sites used our Yagi antennas.
Please check out our YouTube channel
which includes this short video on selecting antennas.
The products used for this project are:
Qty 8x QDR Radio RS485 – Part number PD9119-485
Qty 7x Yagi Antenna – Part number PD9225
Qty 1x 6dB Whip Antenna – Part number PD9242 (for the control room)
Workbench config software – Download here
So if you need RS232 or RS485 cable replacements using radio,