Operating Instructions

Table Of Contents
Chapter 1Introduction
APOGEE Automation Networking
| 118
Siemens Industry, Inc.
Owner's Manual
553-104
Building Technologies
2018-10-01
Figure 1: Figure. Commanding Over an Automation Level Network.
RS-485 P2 Automation Level Network
The RS-485 ALN is a proprietary token-passing network that communicates over RS-
485 cabling. It is Protocol 3 (P3) at and above 38,400 bps, and Protocol 2 (P2) below
38,400 bps.
An Insight workstation is optional with this ALN.
Up to 100 field panels (99 with an Insight workstation) can be connected and can
communicate by means of an RS-485 peer-to-peer network.
Information can be sent and retrieved across the RS-485 ALN from any connected
field panel.