RS-485 Transceivers

Intersil Corp. (See Renesas)Request Info
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MILPITAS, Calif., Sept. 12, 2017 — The ISL32741E and ISL32740E high-speed RS-485 transceivers from Intersil provide 40 Mbps of bidirectional data communication for industrial Internet of Things networks.

The ISL32741E offers 1000 VRMS working voltage and 6 kV of reinforced isolation, more than twice that of competitive solutions. The higher working voltage and reinforced isolation is required for rigorous medical and high-speed motor control applications. The ISL32740E with 2.5 kV of isolation and 600 VRMS working voltage comes in a small package, enabling high channel density for programmable logic controllers in factory automation applications.

The ISL3274xE transceivers provide additional advantages over other isolation technologies, including ultra-low radiated emission and electromagnetic interference susceptibility, support for up to 160 devices on the bus, and an extended 125 °C temperature range. These devices leverage giant magnetoresistance technology that provides galvanic isolation to keep the communication bus free from common-mode noise generated in electrically noisy factory and building automation environments. In addition, Intersil’s giant magnetoresistance isolation does not require the elaborate encoding schemes found in capacitive- and transformer-based isolators that use radio frequency carriers or pulse-width modulation to transfer direct-current and low-frequency signals across the barrier.

The ISL3274xE transceivers are ideally suited for the equipment-to-bus interface in PROFIBUS DP and high-speed RS-485 networks that connect PLCs to instruments, robots, motor control drives, as well as data acquisition and digital input/output modules.

Published: September 2017
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