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245X Communications Converter Units Installation and Operation Manual

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This document provides installation, operation, and application instructions for ABB catalog series 245X Communications Converter Units, which convert between RS-232, RS-485, and fiber-optic interfaces for relay communications. It covers precautions, mounting, connections, and testing for three converter types: RS-232 to RS-485, RS-232 to fiber-optic, and RS-485 to fiber-optic.

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