RS-485: Imported from Wikipedia (overwrite)

2026-05-03T14:13:20Z

Imported from Wikipedia (overwrite)

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{{too technical|date=March 2013}}
'''Smart Distributed System (SDS)''' protocol was developed by [[Honeywell]] and is supported by [[Holjeron]]. SDS is an open [[Event-driven programming|event-driven]] protocol used over [[Controller area network]] based industrial networks. It is used for a highly reliable [[Smart device]]-level network. The SDS Application Layer Protocol is optimized for [[Smart transducer|smart sensor]]s and actuators, where [[Computer configuration|configuration]], diagnostic, and [[Process (computing)|process]] information can be embedded cost-effectively in a very small [[Memory footprint|footprint]].

==Key features==
* Supports communication rates up to 1 Mbit/s.
* 1500 ft maximum distance at 125 [[Bit rate|kbit/s]] (longer with Bridge).
* Can support 64 maximum electrical loads (Nodes) per network without [[Multiport repeater|repeater]] & 126 with repeater.
* Uses 12-24VDC, 2 power wires + 2 communication wires + shield
* Multiple [[physical layer]] topologies
* Can have 126 [[logical address]]es (logical devices) - not related to physical location on the network
* Each [[logical device]] can have 32 objects containing [[Attribute (computing)|attribute]]s, actions and [[Event (computing)|event]]s
* Proven event driven architecture for maximum [[throughput]] (<1ms)
* Event-Driven, [[Master/slave (technology)|Master-Slave]], [[Multicast]] and [[Peer-to-peer]] Services
* Network [[Heartbeat (computing)|heartbeat]] to ensure device health every 2.5 seconds
* Have [[Robustness principle|Robust]] Network Management capabilities (Microsoft architecture)

==External links==
* [http://content.honeywell.com/sensing/prodinfo/sds/verificationtesting.stm SDS Testing]

{{List of automation protocols}}

[[Category:Industrial computing]]
[[Category:Serial buses]]
[[Category:Industrial automation]]

SDS Protocol - Revision history

RS-485: Imported from Wikipedia (overwrite)