Opto Isolated Rs232 Circuit

This design is for a simple half duplex optically isolated interface that converts a 20 ma current loop connected to j2 into an rs232 signal on j1 which can be monitored by say a laptop pc.

Opto isolated rs232 circuit.

This 3 wire rs232 opto isolator features 5000v opto isolation circuitry and optically isolates three 3 rs 232 lines tx rx and gnd which effectively protects your rs 232 devices from ground loops noise problems transient surges remote lightning and spikes. Part of the 80c31 8051 sbc even though i had isolation at the sensors and actuators to make doubly sure the pc also has been isolated. Hi all can anyone point me to a suitable circuit for implementing optically isolated rs232 via max 3232 and the propeller. Your maximum baud rate is 4800 so 208 µs per bit.

Isolated rs 232 transceiver ics provide up to 50v isolation or drive optocouplers for higher voltage isolation. Part of the 80c31 8051 sbc. Circuit for opto isolated rs232. In the author s case the system operates at 1200 baud.

Since the idle level is space you want to detect the mark state by turning on a opto isolator. The iso 232 3p9 is an industrial grade high speed port powered bi directional 5000v 5000vrms min ac optically isolated rs232 port 3 wire isolator in a 9 pin format which will operate reliably up to almost 1 mbps. Rs232 with opto isolation i had to once interface an high voltage circuit to pc the uc had to communicate thru rs232 comm port serial port. 2009 06 29 19 57 41 edited 2010 10 14 22 33 18 in propeller 1.

I had to once interface an high voltage circuit to pc the uc had to communicate thru rs232 comm port serial port. Proper rs 232 logic levels are from below 5 v for space to above 5 v for mark. July 15 2016 delabs digital circuits discrete circuits embedded systems 0. Isolated rs 232 analog devices offers a wide range of rs 232 transceivers to suit many applications.