Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Slide 8 Slide 9 Slide 10 Slide 11 Slide 12 Slide 13 Slide 14 Slide 15 Slide 16 Slide 17 Slide 18 Slide 19 Slide 20 Slide 21 Slide 22 Slide 23 Slide 24 Slide 25 Product List
RS-Slide16

A bidirectional point-to-point RS-422 network can be implemented by adding a return channel along a separate twisted pair. 8-lead full duplex transceivers without enables are typically used for this implementation. Because only one driver is allowed on an RS-422 bus, the master must have an extra receiver – connected to an additional bus - for each slave that it needs to respond to. A bidirectional RS-422 network is commonly used as an RS-232 “extension cord” to connect an industrial PC’s RS-232 port to a corresponding RS-232 port in a piece of remote equipment. The network may be unidirectional, or bidirectional as needed. The typically slow data rates of RS-232 coupled with the noise immunity of differential signaling allows extension cords of up to 4,000’ long. An RS-232 to RS-485 converter is required at both ends of the network, but this can be accomplished using one of Renesas' 2-port dual protocol devices such as the ISL3332.

PTM Published on: 2016-01-04