RS-485: Imported from Wikipedia (overwrite)

2026-05-02T19:07:10Z

Imported from Wikipedia (overwrite)

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{{Short description|List of single collision domain electronic communication bus systems}}
List of electrical characteristics of single [[collision domain]] [[Network segment|segment]] "slow speed" network [[Bus (computing)|buses]]:
{| class="wikitable sortable" style="width:100%;"
! Name !! Multidrop !! Max nodes !! Electrical type !! Cable type !! data-sort-type="number" |Max bitrate [[[kbit/s]]]
! data-sort-type="number" |Length at max bitrate!! data-sort-type="number" |Max length [m]
! data-sort-type="number" |Bitrate at max length
|-
| [[RS-485]] {{nowrap|([[Universal asynchronous receiver/transmitter|UART]] based)}} || Y || 256 || [[Differential signalling|Differential]]|| [[Twisted pair]] || {{nowrap|1000 kbit/s}}
| || {{nowrap|1330 m}}
|{{nowrap|64 kbit/s}}
|-
| [[SCSI|SCSI-1/2]] || Y || 8 || [[Open collector]] || [[Ribbon cable]] || {{nowrap|20 000 kbit/s}}
|{{nowrap|3 m}}|| {{nowrap|6 m}}
| data-sort-value="5000" |{{nowrap|5 Mbit/s/ch}}
|-
| [[SCSI|SCSI Ultra2]] || Y || 16 || [[Differential signalling|Differential]] || [[Ribbon cable]] with twisted pairs || {{nowrap|40 000 kbit/s}}
|{{nowrap|12 m}}||
|
|-
| [[Local Interconnect Network|LIN]]<ref>{{Cite web|url=https://www.lin-cia.org/en/standards/|title=LIN Standards (older versions are free to download, newer to be bought on ISO web site)|website=www.lin-cia.org|access-date=2019-07-31}}</ref>|| Y || 16 ||[[Open collector]]||open collector with pull-up to 12V car supply
|{{nowrap|19.2 kbit/s}}
|{{nowrap|40 m}}||
|
|-
| [[Serial Input/Output eXchange|SIOX]] || Y || 62 || || || {{nowrap|19.2 kbit/s}}
| ||
|
|-
| [[I²C]] || Y || 127 or 1023 || [[Open collector]] || || {{nowrap|5000 kbit/s}}
| || {{nowrap|7.6 m}}
|
|-
| [[SMBus]] || Y || 128 || [[Open collector]] || || {{nowrap|100 kbit/s}}
| ||
|
|-
| [[PMBus]] || Y || 128 || [[Open collector]] || || {{nowrap|400 kbit/s}}
| ||
|
|-
| [[10BASE5]] || Y || 100 || [[Single-ended signalling|Single ended]] || [[RG-8|RG-8X coaxial]] || {{nowrap|10 000 kbit/s}}
|{{nowrap|500 m}}||{{nowrap|500 m}}
|
|-
| [[10BASE2]] || Y || 30 || [[Single-ended signalling|Single ended]] || [[RG-58|RG-58 coaxial]] || {{nowrap|10 000 kbit/s}}
|{{nowrap|185 m}}||{{nowrap|185 m}}
|
|-
| [[Controller–area network|CAN]] || Y || 128 || [[ISO 11898-2]] Differential || [[Twisted pair]] || {{nowrap|20 000 kbit/s}}
|{{nowrap|40 m}}|| {{nowrap|1000 m}}<ref name="ucpros_com-Microcontroller_20Communication_20Interfaces_203">{{cite web|title=Microcontroller Interfaces, Part 3|url=http://www.ucpros.com/work%20samples/Microcontroller%20Communication%20Interfaces%203.htm}} 090114 ucpros.com</ref>
|{{nowrap|50 kbit/s}}
|-
| [[DMX512-A]] || N || 32 || [[Differential signalling|Differential]] ([[RS-485]]) || [[Twisted pair]] {{nowrap|120 Ω}}<ref name="dmx512-online_com-physl">{{cite web|title=Ujjal's DMX512 Pages....DMX512 Physical properties|url=http://www.dmx512-online.com/physl.html|archive-url=https://web.archive.org/web/20010407203303/http://www.dmx512-online.com/physl.html|url-status=usurped|archive-date=April 7, 2001}} 090610 dmx512-online.com</ref> || {{nowrap|250 kbit/s}}
| {{nowrap|548 m}}|| {{nowrap|548 m (1800ft.)}}<ref name="lanbox_com-chapter5">{{cite web|title=DMX Wiring and Practice Quick Reference|url=https://www.pathwayconnect.com/index.php/support/reference-articles/99-dmx-wiring-and-practice-quick-reference}}</ref>
|{{nowrap|250 kbit/s}}
|-
|-
| [[Digital Command Control#How DCC works|DCC]] || Y || 127 || [[Single-ended signalling|Single ended]] ||
|{{nowrap|5 kbit/s}}||
| ||
|-
| [[RS-232]] || N || 2 || [[Single-ended signalling|Single ended]] || || {{nowrap|128 kbit/s}}
|{{nowrap|1.5 m}} (approx)|| {{nowrap |15 m
|{{nowrap|19.6 kbit/s}}
|-
| [[Peripheral Sensor Interface 5|PSI5]] || Y || || || [[Twisted pair]] || {{nowrap|189 kbit/s}}
| || {{nowrap|12 m}} (approx)
|
|-
| [[1-Wire]] || Y || 2<sup>48</sup> || [[Open collector]] || Single conductor, with ground || {{nowrap|16.3 kbit/s}}
| ||{{nowrap|300 m}}
|
|-
| [[X10 (industry standard)|X10]] || Y || 256 || || [[Power line communication|Power line]] || {{nowrap|0.05 kbit/s}} / {{nowrap|0.06 kbit/s}}
| ||
|
|-
| [[FlexRay]] || || || || [[Twisted pair]] || {{nowrap|20 000 kbit/s}}
| ||
|
|-
| [[SENT (protocol)|SENT]]<ref>http://www.diva-portal.org/smash/get/diva2:1162587/FULLTEXT02 "Implementing and Analyzing SingleEdge Nibble Transmission (SENT)Protocol for Automotive Applications", Master thesis of Naseem Ullah, 2014</ref>||N
|2
|[[Single-ended signalling|Single ended]] || Single conductor, with {{nowrap|5 V}} power supply and ground || data-sort-value="39.216" |async. transmission,
min. 39.216 kbits/s

|5 m
|
|
|-
|[[Short PWM Code|SPC]]<ref>{{Cite book|last1=Strasser|first1=Michael|last2=Rasbornig|first2=Friedrich|last3=Platzdasch|first3=Hagen|last4=Gastinger|first4=Ferdinand|last5=Eggiman|first5=Christoph|last6=Beaurenaut|first6=Laurent|title=SAE Technical Paper Series |date=2009-04-20|chapter=Single-Edge Nibble Transmission: Challenges and Evolutions|volume=1 |chapter-url=https://www.sae.org/publications/technical-papers/content/2009-01-0125/|language=English|location=Warrendale, PA|doi=10.4271/2009-01-0125 }}</ref>
|Y
|5
|[[Single-ended signalling|Single ended]] or
[[Open Collector|Open collector]]
|Single conductor, with {{nowrap|5 V}} power supply and ground, shielded when using higher speeds
| data-sort-value="150" |sync. and async. transmission,
variable up to ~150 kbit/s
|~0.5 m
|5 m
|same as SENT
|-
| [[MIPI I3C sensor interface standard|I3C]] || Y || 127 || [[Single-ended signalling|Single ended]] or
[[Open drain]]
| || 12 500 kbits/s
| ||
|
|-
| [[Serial Peripheral Interface Bus|SPI]] || Y || || [[Single-ended signalling|Single ended]]|| || data-sort-value="10000" |variable up to ~10000 kbit/s

(depends strongly on physical setup)
| ||
|
|}


The number of nodes can be limited by either number of available [[Network address|addresses]] or bus capacitance. None of the above use any analog domain modulation techniques like [[MLT-3 encoding]], [[Pulse-amplitude modulation|PAM-5]] etc.

PSI5 designed with automation applications in mind is a bit unusual in that it uses [[Manchester code]].

== See also ==
* [[Multidrop bus]]
* [[Characteristic impedance#Transmission line model|Characteristic impedance]]
* [[Category 5 cable#Electrical characteristics for Cat.5e UTP|Category 5 cable]]
* [[Telegrapher's equations]]
* [[Single-ended signaling]]
* [[Network segment]]
* [[CEBus]]
* [[KNX]] (EIB)

== References ==
{{reflist}}

== External links ==
* [http://www.bipom.com/applications/micro_interfacing.pdf bipom.com - Micro interfacing.pdf]

[[Category:Computer networks]]
[[Category:Serial buses]]

List of network buses - Revision history

RS-485: Imported from Wikipedia (overwrite)