4.4 Hardware Description

The PLCOUP007 board is composed of a transmission branch whose filtering stage has a flat band pass response with typical field impedance. It involves a cost optimization in the BOM.

The PLCOUP007 board is equipped with four test points (V_DD volts, 3.3 volts, ground and PLC signal) and one orange LED for transmission indication.

The PLCOUP007 board could be transformed in an PLCOUP008 board (galvanically non-isolated board version), removing R20 resistor, removing T1 transformer, soldering two 0 ohms resistors in R21 and R22 and soldering a 15 μH coil in L4.

Figure 4-3. PLC Coupling Transmission Schematic

Take into account that, when PLCOUP007 board is set over PL360MB board, V_DD voltage must be 12 volts to maintain the high efficiency consumption; therefore, jumper in J16 must be set (see section Power Supply System).