1 / 15

Exemplu de circuit de separare

UTP / STP Links Using Optocouplers as Isolators Transmisii de date pe cabluri UTP / STP cu separare prin optocuploare. Exemplu de circuit de separare. Basic Isolation Circuit ( switch-mode). Optocoupler Interface provides dual Light-Barrier to protect the transmitter. BALUN :.

beata
Download Presentation

Exemplu de circuit de separare

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. UTP / STP Links Using Optocouplers as Isolators Transmisii de date pe cabluriUTP / STP cu separare prin optocuploare

  2. Exemplu de circuit de separare Basic Isolation Circuit ( switch-mode)

  3. Optocoupler Interface provides dual Light-Barrier to protect the transmitter BALUN : BALUN = Balanced – UnbalancedMode

  4. Semi-duplex Link Uses Optocouplers to Isolate Both Directions

  5. Serial Interface Takes 4-Optocouplers to Achieve Bi-directional Communication

  6. Typically distorted rectangular wave shows reflections

  7. Current LoopVariations in line-impedance are rejected

  8. Signal Formats

  9. Simple : Unbalanced termination of an UTP link uses a voltage signal for transmission, and an optocoupler to isolate the receiver from the line

  10. Overvoltage protection clampdoes not alter isolation and preserves tramsmission speed

  11. Stronger Clamprecommended for higher current UTP links

  12. Differential UTP communication also allows mutual protection of transmitting LEDs

  13. Differential UTP-transmission also providing bi-polar clamp

  14. For most reliable transmission Current-loop is recommended

  15. Current-mode link termination can be easily made bi-polar by using a Graetz-bridge

More Related