Opto Isolated Rs232 Circuit

July 15 2016 delabs digital circuits discrete circuits embedded systems 0.

Opto isolated rs232 circuit. Isolated rs 232 transceiver ics provide up to 50v isolation or drive optocouplers for higher voltage isolation. I had to once interface an high voltage circuit to pc the uc had to communicate thru rs232 comm port serial port. Part of the 80c31 8051 sbc. I have searched the web and found bits of a circuit here and there but i m sure some prophead has done.

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. Proper rs 232 logic levels are from below 5 v for space to above 5 v for mark. Hi all can anyone point me to a suitable circuit for implementing optically isolated rs232 via max 3232 and the propeller. Isolated rs 232 analog devices offers a wide range of rs 232 transceivers to suit many applications.

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. 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. 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.

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. Your maximum baud rate is 4800 so 208 µs per bit. Circuit for opto isolated rs232. 2009 06 29 19 57 41 edited 2010 10 14 22 33 18 in propeller 1.