Product Overview

The Allen-Bradley 1738-IB8M8​ is a versatile, eight-channel, mixed digital input/output (I/O) module belonging to the highly regarded ArmorBlock MaXum family of 1738 Compact I/O modules from Rockwell Automation. This module is designed for distributed, machine-level I/O applications where space is at a premium and environmental ruggedness is required. The defining feature of the 1738-IB8M8​ is its flexible configuration; its eight discrete channels are not fixed as either inputs or outputs. Instead, each channel can be individually configured via software as either a 24V DC sinking input or a 24V DC sourcing output, providing exceptional adaptability to match the exact I/O requirements of the application without the need for different hardware modules. This makes it an ideal solution for control panels, machine segments, or process stations where the mix of sensors and actuators may vary or evolve over time.As part of the ArmorBlock series, the 1738-IB8M8​ is built to withstand harsh industrial environments, featuring a robust IP67-rated enclosure that protects against dust ingress and temporary immersion in water. This allows for direct mounting on machinery without the need for an additional protective cabinet, significantly reducing installation costs and complexity. The module connects seamlessly via the CompactBus interface to other ArmorBlock modules or a network adapter, creating a highly distributed, modular I/O system. The value of the Allen-Bradley 1738-IB8M8​ lies in its ability to consolidate both input and output functions into a single, rugged, and compact unit, offering engineers a powerful tool to simplify wiring, reduce cabinet footprint, and deploy flexible, reconfigurable control at the very point where it is needed on the factory floor.