UTP / STP  Links  Using Optocouplers as Isolators
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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 :.

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


Exemplu de circuit de separare
Exemplu de circuit de separare

Basic Isolation Circuit

( switch-mode)


Optocoupler interface provides dual light barrier to protect the transmitter
Optocoupler Interface provides dual Light-Barrier to protect the transmitter

BALUN :

BALUN = Balanced – UnbalancedMode


Semi duplex link uses optocouplers to isolate both directions
Semi-duplex Link Uses Optocouplers to Isolate Both Directions


Serial interface takes 4 optocouplers to achieve bi directional communication
Serial Interface Takes 4-Optocouplers to Achieve Bi-directional Communication



Current loop variations in line impedance are rejected
Current LoopVariations in line-impedance are rejected



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


Overvoltage protection clamp does not alter isolation and preserves tramsmission speed
Overvoltage protection clampdoes not alter isolation and preserves tramsmission speed


Stronger clamp recommended for higher current utp links
Stronger Clamprecommended for higher current UTP links



Differential utp transmission also providing bi polar clamp
Differential UTP-transmission of transmitting LEDsalso providing bi-polar clamp


For most reliable transmission current loop is recommended
For most reliable transmission of transmitting LEDsCurrent-loop is recommended



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