The RS-485 communication link between the servo drive and ABS encoder typically requires high data rates up to 16 MHz and low propagation delay timing specifications. The RS-485 cabling typically extends to a maximum of 50 meters, but in some cases can be as long as 150 meters. Motor control encoder applications are challenging environments for data communications, because electrical noise and long cable lengths affect the integrity of RS-485 signaling. This article focuses on key benefits for motor control applications using Analog Devices 50 Mbps (25 MHz) ADM3065E RS-485 transceiver and the ADSP-CM40x mixed-signal control processor.
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