Rational Products has already a Digital Pass Throug Modem (DPAT) in the product range. This module is suitable to communicate Modbus RTU over the powerline. In addition to a serial RS232 interface, this module is now adapted to a RS485 interface. This module is available from stock.
To use the application of Modbus Passthrough directly over three phases, Rational Products have taken the step to adjust there Segment Builder. Because the segment builder communicates simultaneously on thee fases it doesn’t matter anymore on which phase the DPAT is connected.
A subsequent development is that the current Din logger will be adjust that existing signals like (pulse-)measurements , temperatures and switching functions can be passed to a higher system / platform via Modbus This makes it very easy to combine your existing installation with a powerline communication system. We expect to offer this solution in Semptebuer 2013.