Isolated Rs232 Circuit

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 rs232 circuit.

The features of the circuit discussed in this application note are. 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. Its output supply range is from 2 7v to 3 6v. Lcd led display oscillators circuit diagrams no comments.

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. Opto isolated rs232 interface schematic circuit diagram. 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. 4kv isolated rs 232 3 3v single supply operation 1 tx and 1 rx 15kv esd protection for rs 232 i o.

Isolated rs 485 analog devices offers a wide range of i coupler isolated rs 485 transceivers to suit many applications. 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. 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. 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.

Isolated rs 232 maxim offers two options that address rs 232 communication where isolation is required.