2/26/2023 0 Comments Checksum error serial portThe wide range of voltages used by the RS-232 port makes possible the compatibility with different types of A/V equipment. Besides, RS-232 ports can work with voltages as low as -5V to +5V. The voltage swings, occurring while transporting data, can total 30V. Another type of connector, terminal block, is becoming more end more popular as it enables simple installation without soldering.Ī standard voltage for all RS-232 signal pins ranges from -15V to +15V. For instance, it may happen that the pins 2 and 3 are reversed which allows the connection to be made with pin-to-pin wiring between a 9-pin connector and a 9-pin cable. At the same time, the pinouts on your controlling system or computer can differ from those used on the A/V devices. A/V equipment usually comes with a 9-pin connector. Some of them serve for port loopback testing. If you want to use the DB-25 connector, just replace the pin numbers of the connector according to the conversion table below.Īs for the 25-pin connector, not all of its pins are used for sending and receiving serial data. In mixed programmes, a 9 to 25 pins converter can be used to unite connectors of different sizes. However, since the introduction of the smaller serial port on the IBM-AT, 9 pins RS232 connector has become more widely used. The original pinout for RS232 was developed for 25 pins connector. RS-232 Pinoutsīelow you’ll see the typical pinouts of RS232 connectors. Your communication software usually overrides the parameters set by Windows Device Manager. There is a set of parameters that needs to be configured for the serial communication – baud rate, parity, number of data bits, stop bits, flow control, etc. Basic characteristics about COM Port protocol
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