Opto Isolated Rs232 Circuit

I had to once interface an high voltage circuit to pc the uc had to communicate thru rs232 comm port serial port.

Opto isolated rs232 circuit.

I have searched the web and found bits of a circuit here and there but i m sure some prophead has done. July 15 2016 delabs digital circuits discrete circuits embedded systems 0. As rs 232 cable networks and the systems to them can be vulnerable to voltage spikes and ground loops we have developed a number of innovations that protect against these issues and create an isolated rs 232 environment. Isolated rs 232 analog devices offers a wide range of rs 232 transceivers to suit many applications.

Proper rs 232 logic levels are from below 5 v for space to above 5 v for mark. Your maximum baud rate is 4800 so 208 µs per bit. 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. 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.

Part of the 80c31 8051 sbc. Since the idle level is space you want to detect the mark state by turning on a opto isolator. Hi all can anyone point me to a suitable circuit for implementing optically isolated rs232 via max 3232 and the propeller. Isolated rs 232 transceiver ics provide up to 50v isolation or drive optocouplers for higher voltage isolation.

In the author s case the system operates at 1200 baud. Rs232 to rs485 converter and adapter wiki diy kit kc485 kc485c electronic circuit diagram opto isolated rs422 with wiring terminals cn0373 note analog devices forum for electronics irs422hv 4 wire full duplex 3kv phoenix contact interface psm me p 2744416 be 0440 standard rs 485 rs232 to rs485 converter and adapter wiki diy kit kc485 kc485c rs232 to read more. Circuit for opto isolated rs232. 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.