A conversation in both directions
Transmit and receive. With TX and RX signals, systems can send commands and follow the responses.
THE ESSENCE OF COM3
Connection is
in our name.
Before it was a brand, COM3 was already a way for systems to communicate.
A reference to serial communication. An identity that reflects what we do: connect technology to the real world.
Discover the meaning01 / ORIGIN OF THE NAME02 / SERIAL CONNECTION03 / OUR ESSENCE
COMMUNICATION INTERFACESERIAL
SOURCESoftwareAn instruction. An intention.
TX · 01000011
THE CONNECTION HAS A NAME
COMMUNICATION PORT
RX · 00110011
DESTINATIONDeviceInformation that becomes action.
01 / THE MEANING
A technical name.
A very human idea.
Getting information
from one side to the other.
On Windows computers, names such as COM1, COM2 and COM3 identify serial communication ports. A program can use these ports to exchange data with a device.
The name COM3 refers to this world: the link between software and hardware, between an instruction and a response, between systems that need to work together.
COMCommunication
3Port identifier
The number identifies the port in the system. It does not necessarily mean the computer's third physical connection.
02 / THE SERIAL CONNECTION
Bit by bit.
System by system.
In serial communication, bits travel through the connection in sequence. This simple foundation allows devices to exchange commands, readings and information.
A CLASSIC REFERENCERS-232
RX · Receive data
The device sends information and the computer receives it through this signal.
DE-9, commonly called DB9. Front diagram of a male RS-232 connector in a DTE configuration. Pin assignments vary by interface and device.
The standard is part of the connection
RS-232 is a serial interface standard. It defines how the electrical signals behave; other serial standards also exist.
The port can also be virtual
USB-to-serial adapters and compatible devices can appear as COM ports. The COM port designation is also used in these cases.
03 / SEE THE IDEA IN MOTION
One message.
Many small signals.
Type a message and watch its characters become bytes. A way to see what happens behind a connection.
MESSAGE
COM3
DESTINATION
BYTES IN BINARY · UTF-80 bytes
MESSAGE AT THE DESTINATION
Ready to transmit.
Visual demonstration at reduced speed. It does not access a real port or send data outside this page.
04 / THE NAME GROWS WITH US
From the serial port
to the connections that
drive operations.
The reference comes from serial communication. The purpose goes further: integrating equipment, networks and software so that technology works together.
Industrial
automation
From the field signal to the information that guides the process.
Networks and
telecommunications
Connections that bring people, teams and operations together.
Software and
integration
Systems that exchange data and work together.
Critical
systems
Technology for operations that require continuity.
COM3.
Connection is just the beginning.
Technical references
The explanations of COM ports and serial communication draw on the following sources. Their connection to the brand is presented as its identity concept.