Item Check
When
Completed
Description
39
Resistor
R1
Proper value for discharge time requirements
Proper voltage rating (>1.4*AC
RMS
line voltage)
Proper power rating for hi-pot test (if applicable)
40
Resistor
R2
Value of 82
Ω
minus L4 DC resistance
41
Varistor
RV1
Proper AC or DC voltage rating so as not to clamp AC peaks
Surge rating for application requirements, see chapter 4
No varistors to earth unless hi-pot testing is performed prior
to insertion of varistor and ground leakage current is not an
issue.
42
Diode
D1
1N4935 type
PLT-22 Transceiver Power Supply - General
Item Check
When
Completed
Description
43
If a linear supply has been used skip the remaining power
supply check list sections.
PLT-22 Transceiver Power Supply - Switching Type
Item Check
When
Completed
Description
44
The preferred operating frequency of the switching power
supply is either 80kHz - 110kHz or >155kHz under all line,
load, environmental, and production conditions.
45
A series inductor is used between the power supply input
and the power mains communication channel to avoid
attenuation due to the input stage of a switching power
supply.
46
The value of the series inductor has been selected for the
application requirements as described in chapter 5.
47
The inductor has a current rating adequate to support the
peak currents drawn by the power supply without
saturation.
B-6
Appendix B
Summary of Contents for LONWORKS PLT-22
Page 6: ...iv Echelon...
Page 14: ...1 8 Introduction...
Page 67: ...LONWORKS PLT 22 Transceiver s User Guide 5 7 Figure 5 3 Capacitor Input Power Supply Schematic...
Page 92: ...6 10 Design and Test for Electromagnetic Compatibility...
Page 110: ...7 18 Communication Performance Verification...
Page 114: ...8 4 References...
Page 118: ...A 4 Appendix A...
