Serial Pin Diagram. This cable may be used to connect any rs 232 equipped device to computer connect two computers via com serial port and so on. The original pin layout for rs232 was developed for a 25 pins d sub connector.
9 pin to 9 pin serial cable. The most recent version of the protocol is known as rs232c. Out of these four pins two are power supply pins such as vcc and gnd.
Sck it stands for serial clock.
Figure 3 is an rs485 wiring diagram for rs485 pinout db9 connectors. Figure 3 is an rs485 wiring diagram for rs485 pinout db9 connectors. Standard 9 pin rs232 serial wiring standard 9 pin rs232 null modem wiring. Connecting together two serial devices involves connecting the rx of one device to the tx of the other and vice versa.