Serial cable

A serial cable is a cable used to transfer information between two devices using a serial communication protocol. The form of connectors depends on the particular serial port used. A cable wired for connecting two DTEs directly is known as a null modem cable.

Serial cables are typically used for RS-232 communication.

Maximum cable lengths

The maximum working length of a cable varies depending on the characteristics of the transmitters and receivers, the baud rate on the cable, and the capacitance and electrical impedance of the cable. The RS-232 standard states that a compliant port must provide defined signal characteristics for a capacitive load of 2500 pF. This does not correspond to a fixed length of cable since varying cables have different characteristics. Empirically tested combinations of bit rate, serial ports, cable type, and lengths may provide reliable communications, but generally RS-232-compatible ports are intended to be connected by, at the most, a few tens of metres of cable. Other serial communications standards are better adapted to drive hundreds or thousands of metres of cable.


gollark: *WORK*, krist node!
gollark: Yes, and yet they have loads of dependents.
gollark: We must make MORE!
gollark: It's the ecosystem's fault for *using* the stupid things.
gollark: `Takes a string and an array of strings and concatenates the first string to each string in the array.`

See also

References
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