Specifications

Chapter 4 – Coupling Circuits
106 PL 3120/PL 3150/PL 3170 Power Line Smart Transceiver Data Boo
k
Introduction
This chapter includes example coupling circuits that address most application requirements. For those who wish to
understand the background behind coupling circuit design, a tutorial covering the design principles follows the detailed
example circuits.
Recommended Coupling Circuits
This section provides schematics and component information for coupling the PL Smart Transceiver to the power mains.
The schematics are divided into classes based on coupling type, isolation and application. Table 4.1 provides a summary
which can be used as a guide to determine the appropriate coupling circuit for a given application.
For each schematic the required component specifications and example suppliers/part numbers are provided. Vendor part
number information is provided as a way to reduce component selection times - because the data sheets for the suggested
parts have already been checked to confirm that the published specifications for these parts meet all of the required
specifications. Alternate component suppliers can be used provided that all of the required specifications listed for each
component are met. While line surge testing must be performed for every new product design, using the first vendor/part
number listed for each component in the tables has the additional advantage that they were the parts used by Echelon for
surge verification.