Transcription of Technical Article #11 Page 1/1 - B&B Electronics
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Technical Article #11 Page 1/1 - B&B Electronics
Technical Article #11 Page 1/1 cable SELECTIONFOR RS-422 AND RS-485 SYSTEMSM aking sense of the specificationsSelecting data cable for an RS-422 or RS-485 system isn tdifficult, but often gets lost in the shuffle of larger system should be taken, however, because intermittent problemscaused by marginal cable can be very difficult to the obvious traits such as number of conductorsand wire gauge, cable specifications include a handful of lessintuitive Impedance (Ohms): A value basedon the inherent conductance, resistance, capacitanceand inductance of a cable that represents theimpedance of an infinitely long cable . When the cableis cut to any length and terminated with thisCharacteristic Impedance, measurements of the cablewill be identical to values obtained from the infinitelength cable . That is to say that the termination of thecable with this impedance gives the cable theappearance of being infinite length, allowing noreflections of the transmitted signal.
Technical Article #11 Page 1/1 CABLE SELECTION FOR RS-422 AND RS-485 SYSTEMS Making sense of the specifications Selecting data cable for an RS-422 or RS-485 system isn’t ...
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