Echelon PCC-10 Guía de usuario Pagina 52

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A-4 External Power Line Transceivers
Pod Logi
c
Ground
Cable
Shield
Two 5.1V
Zener Diodes
Š 0.1 µF
Figure A.2 PCC-10 Card Shielded Pod Cable Circuit
The two (2) zener diodes allow a 5V offset between the cable shield and pod logic
ground. This circuit in figure A.2 is necessary to ensure proper Vcc sequencing
during pod cable insertion into the PCC-10 Card. The • 0.1µF capacitor can be
placed between the shield and pod logic ground to improve EMI performance.
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