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WebThe RS-485 standard allows half-duplex and full-duplex communications. A half duplex arrangement connects all receivers and drivers to the same 2-wire bus as shown in Figure 2. In a full-duplex network, a driver can communicate with one or more devices and then another driver can use the bus to report results or send commands to other receivers. http://www.rs485.com/rs485spec.html my story and i 包包
RS-485 - Wikipedia
Webmechanical, and electrical specifications, RS-485 only defines the electrical characteristics of drivers and receivers that could be used to implement a balanced multipoint … RS-485 is also used in building automation as the simple bus wiring and long cable length is ideal for joining remote devices. It may be used to control video surveillance systems or to interconnect security control panels and devices such as access control card readers. See more RS-485, also known as TIA-485(-A) or EIA-485, is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced, and multipoint systems … See more RS-485 supports inexpensive local networks and multidrop communications links, using the same differential signaling over twisted pair as RS-422. It is generally accepted that RS-485 can be used with data rates up to 10 Mbit/s or, at lower speeds, distances … See more RS-485, like RS-422, can be made full-duplex by using four wires. Since RS-485 is a multi-point specification, however, this is not necessary or … See more RS-485 signals are used in a wide range of computer and automation systems. In a computer system, SCSI-2 and SCSI-3 may use this … See more The EIA once labeled all its standards with the prefix "RS" (Recommended Standard), but the EIA-TIA officially replaced "RS" with "EIA/TIA" to help identify the origin of its standards. The EIA has officially disbanded and the standard is now maintained by the … See more Converters between RS-485 and RS-232 are available to allow a personal computer to communicate with remote devices. By using See more RS-485 does not define a communication protocol; merely an electrical interface. Although many applications use RS-485 signal levels, the … See more WebWatco moves any commodity, and on this railroad, it’s primarily products for the metals, forest products, building materials, chemicals, propane, and fuel industries. Track Miles. … my story a tale down under