Rockwell Automation 1786-series ControlNet Coax Media Planning and Installation Guide - Manual (Page 22)

22 Publication CNET-IN002B-EN-P - June 2010
Chapter 2 Plan a ControlNet Coax Media System
Choose the Cable Type There are several types of RG-6 quad-shield cable that are appropriate for your
installation. Choose the appropriate cable with environmental factors
associated with your application and installation site in mind. You can use the
Mechanical Ingress Climatic/Chemical and Electromagnetic
( MICE ) concept
in the IEC 61918 standard to help determine your environmental conditions.
You should install all wiring for your ControlNet cable system in accordance
with the regulations contained in the National Electric Code (or applicable
country codes), state codes, and applicable municipal codes.
Determine Trunk Cable
Section Lengths A segment is comprised of several sections of coax trunk cable, taps, and two
terminating resistors.
See page 23 to determine the number of devices and allowable cable length.
For this application
Use this cable type
(1)
(1) See the ControlNet Media System Components List, publication AG-PA002 , for information on part numbers.
Industrial applications Standard-PVC CM-CL2
Heavy industrial applications Lay-on armoured and interlocking armour
High and low temperature applications,
corrosive areas (harsh chemicals),
fire safety Plenum-FEP CMP-CL2P
Festooning or flexing applications High-flex
Moisture resistant applications; direct
burial, with flooding compound,
fungus resistant Flood burial
IMPORTANT
When determining the cable length of trunk-cable sections,
make sure you measure the actual cable path as it is routed in
your network. Consider vertical dimensions as well as
horizontal dimensions. You should always calculate the
three-dimensional routing path distance when determining
cable lengths.
If your cable has foot or meter markers as part of the cable
legend, the length used may be determined by reading the
legends at both ends of the section.