A Chapter of the
- RS-232 — TIA/EIA-232
- RS-485 — TIA/EIA-485
- RS-422 — TIA/EIA-422
- 100BASE-FX Ethernet
- 100BASE-TX Ethernet
The RS-232 (Recommended Standard-232) or also known EIA-232 (Electronic Industries Alliance-232) is a standard for the serial transmission of data in industrial applications.
The standard defines the timing, electrical characteristics and meaning of signals as well as the physical size and pinout of connectors.
The RS-485 (Recommended Standard-485) or also known EIA-485 (Electronic Industries Alliance-485) standard defines the characteristics of an electrical interface for serial communications in industrial control systems.
In contrast to the older RS-232, it allows to balance electrical signals and connect multiple device to the network, which can stretch over longer distances and harsher environments.
The RS-422 (Recommended Standard-422) or also known EIA-422 (Electronic Industries Alliance-422) standard defines the characteristics of an electrical interface for serial communications in industrial control systems.
It was designed to replace the older RS-232C standard in order to provide higher speed (up to 10 Mb/s), better immunity from noise, and longer cable lengths (up to 1,500 meters).
100BASE-FX is a physical layer specification for Fast Ethernet over fiber optics using two multi-mode fiber optic strands for both links, reception and transmission.
The maximum length is 412 meters for half-duplex connections (to ensure that collisions are detected) or 2 kilometers for full-duplex.
100BASE-TX is the most common Fast Ethernet physical layer, transmitting data through two twisted wire-pairs (one for each direction), which provide full duplex operation with 100 Mbit/s of throughput in each direction.
Cabling distances are limited to 100 metres (328 ft) for each network segment.
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