There are oodles of different types of rs232 cables but the only real difference is which pins of the rs232 port they actually use.
Rs232 9 pin wiring.
Rs232 pinout below is the pinout of a typical standard male 9 pin rs232 connector this connector type is also referred to as a db9 connector.
An rs232 pinout 9 pin cable features nine pins.
A computer s serial com port dte is usually a male port as shown below and any peripheral devices you connect to this port usually has a female connector dce.
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.
Then the rs232 wiring was condensed into the 9 pin connector a victim of evolution if you like.
Wiring and constructional details for rs232 serial data cables.
The reason for the 9 pin and 25 pin connectors is the 25 pin came along first.
Rs232 basics rs232 standard software handshaking signals voltage levels pinouts connectors loopback connections rs232 cables.
This is the second of two unpaired handshake lines.
Pin connections db9 9 way db25 25 way.
Do you need networked serial.
Rs232 pin assignments db25 pc signal set pin 1.