CalAmp Guardian-100 User Manual

CalAmp Guardian-100 User Manual Manual pdf 17 page image

001-5006-000_FCC.docx Page 1722 SSYYSSTTEEMM AARRCCHHIITTEECCTTUURREE AANNDD NNEETTWWOORRKK PPLLAANNNNIINNGGThis section briefly discusses network architecture (including basic network types),interfacing modems and DTE, data protocols for efficient channel operation, addressing, andrepeaters.Guardian is designed to replace wire lines in SCADA, telemetry and control applications. TheRS-232 serial port allows direct connection to Programmable Logic Controllers (PLCs) orRemote Terminal Units (RTUs). A SCADA system is defined as one or more centralizedcontrol sites used to monitor and control remote field devices over wide areas. Forexample, a regional utility may monitor and control networks over an entire metropolitanarea. Industry sectors with SCADA systems include energy utilities, water and wastewaterutilities, and environmental groups.The Guardian is intended for use in the Industrial Monitoring and SCADA market. The rangeof the Guardian is dependent on terrain, RF (radio frequency) path obstacles, and antennasystem design. This section provides tips for selecting an appropriate site, choosing anantenna system, and reducing the chance of harmful interference.2.1 SINGLE COVERAGE AREAIn a network topology with only a single coverage area (all units can talk to one anotherdirectly), there are several common system configurations.The most common is for one unit to be designated as a master and the rest designated asremotes. Another system configuration is Report-by-Exception.2.2 NETWORK ARCHITECTURE2.2.1 Point-to-PointA point-to-point network is the most simple of all networks, and may be used for connectinga pair of PC's, a host computer and a terminal, a SCADA polling master and one remote,mobile applications (like in-vehicle GPS receivers and base stations) or a wide variety ofother networking applications.Figure 2.1 – Point-to-Point Network