Isolated Rs232 Circuit

June 29 2018 in.

Isolated rs232 circuit.

This circuit represents an interface converter between the uart pins of a microcontroller with ttl levels and a standardised rs232 port with symmetric 15 v levels. 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. Its output supply range is from 2 7v to 3 6v. 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.

Isolated rs 232 interface figure7 shows an isolated rs 232 interface using ps9121 optocouplers rated for 3 75kv isolation and up to 15mbps data rate. Isolated rs 485 analog devices offers a wide range of i coupler isolated rs 485 transceivers to suit many applications. The features of the circuit discussed in this application note are. These galvanically isolated rs 485 rs 422 transceivers are available in full duplex and half duplex for use in markets ranging from motor control to industrial automation and process controls.

This reference circuit provides a cost effective low component count solution for isolated rs 232 single channel applications such as for a utility meter reader. In contrast to the commonly used ic solutions such as the max232 it also provides electrical isolation between the two sides of the converter. Isolated rs 232 maxim offers two options that address rs 232 communication where isolation is required. First is the resistive isolated rs 232 transceiver that offers isolation up to 50v which eliminates the need for optocouplers for data transfer and a transformer for isolated power.

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