RS232 pinout and cables layout
Serial port interface
Serial port interface
introduction
RS232 to RS232, RS232C
RS232 to RS232 connection using DB9 connectors.
RS-232 - RS-232 connection using DB25 connectors.
Serial Port to Serial Port. Possible variants and cables. DTE-DCE, DTE-DTE.
Serial port pinout and signal
The serial port is an I/O (Input/Output) device. An I/O device
is just a way to get data into and out of a computer. There
are many types of I/O devices such as serial ports, parallel
ports, disk drive controllers, ethernet boards, universal
serial buses, etc. Most PC's have one or two serial ports.
Connectors and
signals
RS232 pinout and signals
Serial port pinout and signals
Full DB25 serial (RS232) port pinout and signals
DB9 pinout and signals
DB25 pinout and signals
PC DB25 serial
(RS232) loopback (CheckIt)
PC DB25 serial
(RS232) loopback (Norton)
PC DB9 serial
(RS232) loopback (CheckIt)
PC DB9 serial
(RS232) loopback (Norton)
Serial printer
Serial port cables and signals
While the normal PC hardware might well run with just Tx,
Rx and Ground connected, most driver software will wait forever
for one of the handshaking lines to go to the correct level.
Depending on the signal state it might sometimes work, other
times it might not.
Serial port and
RS232 port cables and signals
Serial and RS232
port monitor cables
Serial data transfer
cable
Serial (RS232) two-wire
modem cable (DB25-DB25)
Serial (RS232) two-wire
modem cable (DB9-DB25)
Serial (RS232) modem
cable (DB25-DB25)
Serial (RS232) modem cable
(DB9-DB25)
Serial (RS232) modem cable
(DB9-DB15)
Null modem cable
(DB25-DB25)
Null modem cable (DB9-DB25)
Null modem cable (DB9-DB9)
Serial
printer cable (DB25-DB25)
Serial
printer cable (DB9-DB25
USB cables and signals
USB port sockets, connectors, cables: pinouts and signals