Satchwell NIU Network Interface Unit Specification Sheet

This document is a specification sheet for the Satchwell NIU (Network Interface Unit), a device that provides serial communication ports (RS 232 and RS 485) for connecting terminals and modems to a Building Automation System (BAS) Local Area Network (LAN). It details the unit's features, technical specifications (including power supply, communication speeds, memory, and environmental limits), construction, wiring precautions, and typical connection diagrams for multi-terminal systems using modems.