Figure 3-6. PLC Bands Supported by PL485
G3-PLC
CEN-A
0
100
200
300
400
500
Frequency
(kHz)
G3-
PLC
CEN-B
CENELEC [3...148,5 kHz]
G3-PLC ARIB
ARIB [10...450 kHz]
G3-PLC FCC
FCC [10...490 kHz]
USA
JAPAN
EUROPE
CH3
CH4
CH5
CH6
CH7
CH8
CH3
CH4
CH5
CH6
CH7
PRIME 1.4
CH1
PRIME 1.3 & 1.4
PRIME 1.4
The coupling circuit of the PL485-EK kit is described with more detail in the chapter
read the application note
Using PL485 to implement a fully featured G3-PLC/PRIME modem
.
3.3.2
PLC Coupling Circuitry Description
The PL485-EK evaluation board communicates in the band between 95 kHz and 125 kHz (CENELEC B-Band). The
PL485-EK board implements a circuit to couple the PLC signal to the transmission line. This design is based on
Microchip reference design for a non-isolated coupling in CENELEC-B band without external amplifier, including
some modifications to couple the PLC signal to a DC BUS instead to the 220 Vac mains. PL485-EK operates with
PL485 internal PLC driver, with no additional external amplification.
The following figure shows the PLC coupling circuit implemented in PL485-EK, which is composed of three sub-
circuits:
1.
Filtering Stage
2.
Coupling Stage
3.
Reception Stage
PL485-EK
PL485-EK Board
©
2020 Microchip Technology Inc.
User Guide
DS50002954B-page 15
