Hp terminal to db9 serial printer pinouts

The RS protocol specifies the operation mode, electrical standards, number of bits, and voltage levels to be used when transferring data between a DTE and DCE. Serial communication devices make use of 9 or 25 pin D-type connectors for their cabled connections. They are commonly designated as DB-9 or DB with the number used to differentiate between the pin counts. The plugs contain sockets and pins, with each pin numbered and labeled. A serial pinout diagram is presented below. The RS protocol uses a 9 pin serial port that can have either male or female connectors.

The most recent version of the protocol is known as RSC. RSC retains the features of RS but uses 25 pins rather than a 9 pin serial pinout. Whether a DB9 serial pinout or a 25 pin connection is used, only three of the pins are required to connect terminal devices. Each pin in a 9 or 25 serial connector pinout has its own distinct function. You can also learn RS pinout.

In addition to defining electrical characteristics, RS specifies the signals used in serial cable pinouts and serial ports. Familiar items such as timing signals and ground are included in these specifications. Macintosh serial cables may also work for terminal connections if lines 2 and 3 are crossed, as in a null-modem cable , but not for modem connections, since the Macintosh cable has no DCD line. There are several different Mac modem cables, so check that the pinout matches what you need.

Note that DB25 pin 6, 15, 22, 24, and 25 are not supported on the Sun serial port adapter cable. Not all will work. Reprinted from the Sun Microsystem Inc. This is seldom necessary with modern serial devices, because most devices can use either voltage set. But, there are those rare times when some strange device cares about the serial port voltage.

The 2 ports are wired in the same way. The serial port connector provides asynchronous serial communications. Use a splitter cable Sun part XA to access port B. The serial port connector provides synchronous and asynchronous serial communications.

The serial ports support baud rates of 50 to Pinouts for the adapters are given below. Have you found the serial port pinout for a Sun machine not listed here? If so, send it to the Webmaster with a pointer to the information, so we can verify it before adding it to this list. This is usually the pinout found in null modem cables for DB25 to DB This is usually the pinout found in null modem cables for DB9 to DB9.

This is usually the pinout found in null modem cables for DB25 to DB9. All forum topics Previous Topic Next Topic. New member. Message 1 of 2. HP Recommended. Tags 2. Tags: Archived. Level Message 2 of 2. Was this reply helpful?