Satchwell Modem Interface Unit (MIU) Manual

This document describes the Satchwell Modem Interface Unit (MIU), which links a modem to Satchwell Networking controllers on a remote site via RS232 and RS422/485 ports, supporting up to 31 controllers or acting as a repeater for up to 63 controllers. It provides opto-isolation and galvanic isolation for LAN connections, includes LED status indicators, and details specifications, installation, commissioning steps, and wiring precautions.