Plan a controlnet coax media system, Introduction, Chapter 2 – Rockwell Automation 1786-series ControlNet Coax Media Planning and Installation Guide User Manual
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Publication CNET-IN002B-EN-P - June 2010
17
Chapter
2
Plan a ControlNet Coax Media System
Introduction
The information in this chapter will help you determine your network
requirements. Along with this data, consult engineering drawings of your
facility for specific information concerning the best location for installing
your network.
For example, dusty indoor or harsh outdoor conditions will determine whether
you need IP20 or IP67 components. IP means Ingress Protection, a rating
based on IEC 60529 standard to determine the strength of an enclosure for
electrical equipment. Rugged IP67 equipment is typically priced higher, so you
must plan accordingly to stay within budget.
See
for more information.
The table outlines what you should consider when designing your system.
IMPORTANT
The ControlNet cable system is a ground-isolated coaxial
network. Proper selection of cable, connectors, accessories,
and installation techniques is necessary to make sure it is not
accidentally grounded.
Topic
Page
Determine the Number of Taps You Need
Choose the Connection for Programming Devices
Determine Trunk Cable Section Lengths
Decide the Number of Terminating Resistors
Determine Repeater Requirements
Decide Whether to Use Redundant Media
Decide Whether You Need IP67 Media
Follow Application and Installation Guidelines