Echelon LONWORKS PLT-22, User Manual

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5 Power Supplies for the PLT-22 Transceiver
5-1
Introduction 5-2
Power Supply Design Considerations 5-2
Power Supply-Induced Attenuation 5-2
Power Supply Noise 5-3
Energy Storage Power Supplies 5-3
Energy Storage Capacitor-Input Power Supplies 5-5
Capacitor-Input Power Supply Schematic 5-7
Energy Storage Linear Supplies 5-8
Traditional Linear Power Supplies 5-9
Switching Power Supplies 5-9
Power Supply-Induced Attenuation 5-9
Noise at the Power Supply Input 5-12
Switching Power Supply Frequency Selection 5-12
Switching Power Supply Input Noise Masks 5-12
Switching Power Supply Output Noise Masks 5-17
Options 5-21
Pre-designed Switching Supplies 5-21
Off-the-Shelf Switching Supplies 5-22
Custom Switching Supplies 5-22
6 Design and Test for Electromagnetic Compatibility
6-1
EMI Design Issues 6-2
Designing Systems for EMC (Electromagnetic Compatibility) 6-2
ESD Design Issues 6-4
Designing Systems for ESD Immunity 6-4
Conducted Emissions Testing 6-6
7 Communication Performance Verification
7-1
Why Verify Communication Performance? 7-2
Verification Strategy 7-2
Power Line Test Isolator 7-3
Test Equipment 7-4
Good Citizen Verification 7-6
Unintentional Output Noise Verification 7-6
Excessive Loading Verification 7-7
Transmit Performance Verification 7-10
Receive Performance Verification 7-11
Packet Error Measurement with Nodeutil 7-11
Verification Procedure 7-12
8 References
8-1
Reference Documentation 8-2
Appendix A PLT-22 Transceiver Isolation Transformer
A-1
Specifications
PLT-22 Transceiver Isolation Transformer Schematic A-2
PLT-22 Transceiver Isolation Transformer Electrical A-2
Specifications
PLT-22 Transceiver Isolation Transformer Vendors A-3
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