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RS-485

RS-485, also known as TIA-485(-A) or EIA-485, is a standard, originally introduced in 1983, defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced, and multipoint systems are supported. The standard is jointly published by the Telecommunications Industry Association and…

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Available signals
A, B, C
Connector types
Not specified
Maximum devices
At least 32 unit loads
Maximum distance
Not specified
Mode of operation
Different receiver levels: binary 1 (OFF) (Voa–Vob < −200 mV) binary 0 (ON) (Voa–Vob > +200 mV)
Network topology
Point-to-point, multi-dropped, multi-point

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Overview

Standard

Full duplex operation

Converters and repeaters

Protocols

Applications

Signals

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RS-485

Nodes66
Edges65
Triples59
Avg. degree1.97
Density0.030303
Components1

How this topic connects Entity context

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RS-485

Top relations

related to External links · 15
RS-485 → Analog, External Fail-Safe Biasing, Guidelines, Idle Bus, Maxim, Proper Wiring, Renesas, RS-485 Circuit Implementation Guide, RS-485 Frequently Asked Questions, RS-485 Network, RS-485 Networks, RS-485 Passive Failsafe, RS-485 Resistor Calculator, TI, TIA-485-A
related to Standard · 12
RS-485 → April, EIA RS-485, EIA/TIA, It, Other, RS, The, The EIA, The Telecommunications Systems Bulletin, TIA, TIA-485, TSB-89
related to overview · 10
RS-485 → As, If, In, It, Mbit/s, RS-422, Star, The, This, Thus
has application · 3
RS-485 → In, SCSI-2, SCSI-3
related to Converters and repeaters · 3
RS-485 → By, Converters, RS-232
related to Full duplex operation · 2
RS-485 → RS-422, Since RS-485
related to Protocols · 2
RS-485 → Although, Interoperability
Available signals · 1
RS-485 → A, B, C
Connector types · 1
RS-485 → Not specified
Maximum devices · 1
RS-485 → At least 32 unit loads

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Important terminology

standard used signal data devices systems also cable logic may electrical bus using communications network use control characteristics applications signals

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
RS-485Available signalsA, B, C1.00infobox
RS-485Connector typesNot specified1.00infobox
RS-485Maximum devicesAt least 32 unit loads1.00infobox
RS-485Maximum distanceNot specified1.00infobox
RS-485Mode of operationDifferent receiver levels: binary 1 (OFF) (Voa–Vob < −200 mV) binary 0 (ON) (Voa–Vob > +200 mV)1.00infobox
RS-485Network topologyPoint-to-point, multi-dropped, multi-point1.00infobox
RS-485Physical mediaBalanced interconnecting cable1.00infobox
RS-485StandardANSI/TIA/EIA-485-A-1998 Approved: March 3, 1998 Reaffirmed: December 7, 20121.00infobox
RS-485is amulti-point specification0.90text
access control card readers.It is also used in Digital Command Controlinstance ofIt may be used to control video surveillance systems or to interconnect security control panels and devices0.80text
RS-485has applicationIn0.60section
RS-485has applicationSCSI-20.60section

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