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RS485-Slide3

A wide variety of network configurations exist for RS-485. However, for high speed application in particular, the point-to-point link is probably the most common structure applied. Single and parallel point-to-point links are applied when high data throughput is needed across long distances. Full-duplex point-to-point links are used in applications requiring low latency and high data throughput by allowing for simultaneous transmitting and receiving. Half-duplex point-to-point links are used for low cabling cost, while ensuring high data rates without stringent latency requirements. Half-duplex multipoint data links are utilized in longer distance networks where multiple nodes are addressed via a single signal-pair. Here data rates are in the lower Mbps range (despite the claim of PROFIBUS for 12 Mbps capability). Full-duplex multipoint networks favor high speed applications because of removed latency due to simultaneous transmitting and receiving between multiple nodes.

PTM Published on: 2015-10-27