RS485 is very similar to RS422. So much so that it often causes confusion. Both are multi-drop, and both can communicate via very long distances, so then why choose one over the other? First of all, RS485 is generally a 2-wire system, although some manufacturers may specify 4-wire RS485, which is far less common and very similar to RS422 protocol. RS-485 Cable. Belden offers the industry's widest range of RS-485 cable options. From power limited tray cable (PLTC) and plenum (CMP) rated cable to low smoke zero halogen cable, you get the ideal solution for your automation network. The industrial RS-485 cables are designed with low capacitance, ideal for long distance applications. This information touches on some of the most commonly asked aspects of RS-485 communications. B&B Electronics has a free application note available on RS-422/485 that gives a more complete picture of RS-485 networks. Request B&B's RS-422/485 Application Note, available by mail or on our websites, www.bb-elec.com or www.bb-europe.com.

The RS485 receiver compares the voltage difference between both lines, instead of the absolute voltage level on a signal line. This works well and prevents the existence of ground loops, a common source of communication problems. USB to RS485 Adapter Features. Adds four high speed half-duplex RS-485 serial ports via USB connection. Definition of RS-485 in the Definitions.net dictionary. Meaning of RS-485. What does RS-485 mean? Information and translations of RS-485 in the most comprehensive dictionary definitions resource on the web.. Usage. The Arduino RS485 library enables you to send and receive data using the RS-485 standard with Arduino® RS485 Shields, like the MKR 485 Shield. Please refer to the MKR RS485 Shield documentation for the specific settings about half, full duplex, and termination. This library supports the MAX3157 and equivalent chipsets. To use this library:.
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