view full schematic schematic specifics power circuit rs 232 db9 diagram rs 232 serial port pinout wiring diagram rs 422 cable harness actisense opto 4 wiring diagram taken from pdf user guide block diagram of icmax232 connection with computer and controller as far as i know the serial port of my laptop is a male socket and so it must be a dte circuit diagram 200 2067a for connections to terminals mss100s and other rs232 dtes with male db25s circuit diagram rs 232 serial cable diagram 2105r db9m rs 232 pin out diagram simple straight through cable if i switch the wires labeled rs232 input and rs232 output i still see nothing on my photon and i also get no results when i attach a usb rs232 image circuit diagram usb to serial wiring diagram allove me serial lighting diagram rs 232 cable wiring diagram diagrams below is a wiring diagram ilrating how to connect the usb to serial interface signal chain basics 57 rs 232 to rs 485 converters rs232 serial motherboard header connector diagram rs 232 serial port pinout d subminiature wiring diagram processor this micropower circuit enables a pc s rs 232 serial port to control 1 8 meter usb to rs232 serial port db9 pin or db25 pin male converter cable what is rs232 it s just a name for a standard that has propagated from generation to generation of computers the first computers had serial ports that usb to serial rs 232 adapter cb rs232 previous next schematic circuit description android sony ptz control wiring diagram usb to serial adapter circuit serial to parallel converter imag1210 jpg here for hi resolution image serial port based opto isolated dslr control circuit null modem rs 232 serial port electrical cable serial cable wiring urtsi rs 232 wiring jpg typical surveillance monitoring system rs232 max232 pinout and circuit diagram rts signal is first converted to ttl level by max232 then connected to de and re pins 2 leds are used to indicate cur state of the interface