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The Allen-Bradley 1756-DHRIOXT is designed for extreme environments as part of the ControlLogix Data Highway Plus/Remote I/O Communication Modules. This module facilitates communication between devices on different networks, offering support for Data Highway Plus (DH+) messaging, Control and Information Protocol (CIP) messaging, and remote I/O communication, with the ability to route messages through up to three chassis and four communication networks. It is equipped with two selectable ports for DH+ or remote I/O, supporting up to 32 logical rack connections and 16 block-transfer connections per remote I/O channel, and it maintains a DH+ communication rate of 57.6 Kbps alongside RIO rates up to 230.4 Kbps. Compatible with multiple ControlLogix Chassis and the 1756-PBXT power supply, the 1756-DHRIOXT operates efficiently within a temperature range of -25 to 70 °C, making it suitable for demanding industrial applications.