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Smart Distributed System (SDS) protocol was developed byHoneywell and is supported byHoljeron. SDS is an openevent-driven protocol used overController area network based industrial networks. It is used for a highly reliableSmart device-level network. The SDS Application Layer Protocol is optimized forsmart sensors and actuators, whereconfiguration, diagnostic, andprocess information can be embedded cost-effectively in a very smallfootprint.

• Supports communication rates up to 1 Mbit/s.
• 1500 ft maximum distance at 125kbit/s (longer with Bridge).
• Can support 64 maximum electrical loads (Nodes) per network withoutrepeater & 126 with repeater.
• Uses 12-24VDC, 2 power wires + 2 communication wires + shield
• Multiplephysical layer topologies
• Can have 126logical addresses (logical devices) - not related to physical location on the network
• Eachlogical device can have 32 objects containingattributes, actions andevents
• Proven event driven architecture for maximumthroughput (<1ms)
• Event-Driven,Master-Slave,Multicast andPeer-to-peer Services
• Networkheartbeat to ensure device health every 2.5 seconds
• HaveRobust Network Management capabilities (Microsoft architecture)

• SDS Testing

• Industrial computing
• Serial buses
• Industrial automation

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