Echelon LONWORKS PLT-22, User Manual

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Contents
1 Introduction
1-1
Audience 1-6
Content 1-6
Related Documentation 1-6
2 Using the PLT-22 Transceiver
2-1
Mechanical Dimensions 2-2
PLT-22 Transceiver Pinout 2-3
PLT-22 Transceiver Electrical Specifications 2-4
External Components 2-6
Crystal 2-6
Power Supply Bypassing and Grounding 2-7
Band-in-Use (BIU) and Packet Detect (PKD) LED Connections 2-7
Neuron ® Chip Connections 2-8
Transmit Output Level 2-10
TXON Output Signal 2-10
Application Schematic: Neuron 3150 ® Chip 2-11
Application Schematic: Neuron 3120 ® Chip 2-12
3 PLT-22 Transceiver Programming
3-1
Dual Carrier Frequency Mode 3-2
CENELEC Access Protocol 3-3
Power Management 3-3
Standard Transceiver Types 3-4
LonBuilder ® and NodeBuilder ® PLT-22 Transceiver 3-6
Channel Definitions
4 Coupling Circuits
4-1
Power Line Communications 4-2
Coupling Techniques 4-4
Power Line Coupling Basics 4-4
Power Line Coupling Details 4-8
Safety Issues 4-11
Safety Isolation Considerations 4-11
Ground Leakage Currents 4-13
Capacitor Charge Storage 4-13
Line Surge Protection 4-13
Fuse Selection 4-16
Recommended Coupling Circuit Schematics 4-16
Example 1: Line-to-Neutral, Non-Isolated Coupling 4-18
Example 2: Line-to-Neutral, Transformer-Isolated Coupling 4-20
Example 3: Line-to-Earth, Non-Isolated Coupling 4-22
Example 4: Line-to-Earth, Transformer-Isolated Coupling 4-24
L
ON
W
ORKS
PLT-22 Transceiver User’s Guide i