Then the rs232 wiring was condensed into the 9 pin connector a victim of evolution if you like.
Rs232 9 pin wiring.
Rs232 wiring using the cpu 9 pin serial port the rmc100 cpu module has a dte db9 serial port labeled rs 232 monitor both rmcwin and the rmclink activex control and net assembly component use this port.
Its original function was.
Rs232 basics rs232 standard software handshaking signals voltage levels pinouts connectors loopback connections rs232 cables.
Data carrier detect after a data terminal is detected a signal is sent to the data set that is going to be transmitted to the terminal.
Wiring and constructional details for rs232 serial data cables.
Pin connections db9 9 way db25 25 way.
Rs232 connections and wiring up serial ports.
Rs232 pin assignments db25 pc signal set pin 1.
The reason for the 9 pin and 25 pin connectors is the 25 pin came along first.
This is the second of two unpaired handshake lines.
Do you need networked serial.
An rs232 pinout 9 pin cable features nine pins.