EX301 and EX302 I/O Bus Expansion Modules Manual

This document describes the EX301 and EX302 expansion modules used to segment a 2010 I/O bus, allowing up to 99 modules to be addressed from a single CPU across a maximum of 10 bus segments. It covers technical specifications, status LEDs, address setting via a BCD number dial, and cabling requirements for the expansion master and slave modules.