Rockwell Automation 1786-series ControlNet Coax Media Planning and Installation Guide - Manual (Page 45)

Publication CNET-IN002B-EN-P - June 2010 45
Install a ControlNet Coax Media System Chapter 3
Plan the Taps Installation Follow these guidelines when selecting where to mount the taps based on your
topology design. Protection of the tap should always be considered when
selecting a location to mount the tap.
•
If minimum spacing between taps is desired, use a 1786-BNCP barrel to
connect the taps together.
•
Consider trunk routing, cable bend radius, and device location when
locating and mounting the tap. The bend radius is 1.5 in. for all fixed-tap
drop cables and 3 in. for drop cables pulled through conduit.
•
Be sure the location where you are going to mount a tap does not cause
any cable bend radii to exceed the limits listed on
page 44 .
•
Do not mount a tap in a position that routes the drop cable over any
AC power terminals on nearby modules.
Mounting the Taps
You can mount your ControlNet taps (Y-tap and T-tap) in several ways.
•
Use a universal mounting bracket, and then mount the tap and bracket
as an assembly.
•
Use the body holes in the tap to mount with screws and flat washers or
a tie wrap.
ATTENTION
Do not allow any metal portions of the tap, connectors, or
cable shields to contact any conductive surfaces. This
contact could cause noise on the ControlNet network.
TIP
See Appendix A for universal mounting bracket and tap
mounting dimensions.