ANSI 709.1 is an intelligent distributed networking infrastructure designed for control applications. It allows devices to communicate directly with each other on a peer-to-peer basis, without the need for a PLC or central controller. This makes it easy to add devices to the network and does not require any changes to existing wiring. ANSI 709.1 also provides an open, interoperable network that can communicate with IP-based Ethernet networks.
This document explains how Echelon combines industrial Ethernet with the ANSI 709.1 open, interoperable, distributed‑control architecture. It describes the benefits of using non‑shielded twisted‑pair cabling, low‑cost nodes and a client‑server management system to achieve reliable, low‑cost networking for sensors, actuators and controllers.
The paper also compares typical industrial Ethernet implementations with ANSI 709.1/709.3 physical layers, outlines network configuration tools, and provides example routing solutions that support both peer‑to‑peer and master‑slave communication over TCP/IP. This manual is written in Chinese.
| Connector type | Industrial RJ‑45 vs two‑wire |
|---|---|
| Cable type | Unshielded twisted pair (Belden 85102, Belden 8471, Cat‑5) |
| Cable gauge | 24 AWG (0.3 mm) for Ethernet, 16‑24 AWG (0.12‑0.3 mm) for ANSI709 |
| Maximum segment distance | 100 m point‑to‑point (Ethernet) vs 500 m multi‑drop (ANSI709) up to 2700 m bus |
| Devices per segment | Up to 64 devices on an ANSI709 network |
A typical ANSI 709 bus can support up to 64 devices per segment.
When produced in appropriate volumes, a node can cost less than $10 each.