Rockwell Automation 1797-Series ControlNet Ex Media Plannng Installation Manual - Manual (Page 44)

Publication CNET-IN003A-EN-P - January 2006
3-2 Install a ControlNet Ex Media System
Wire Inside Enclosures
When the RG-6 type coax cable is not being pulled through conduit,
follow these specifications.
The 1797-EXMK Cable Marking kit is available for clearly marking
drop cables and trunk cables as intrinsically-safe.
Mount the Taps First select where you want to mount the taps, then use this mounting
procedure.
Select Where to Mount the Taps
There is no spacing requirement between taps; you can install two
adjacent taps if necessary by using a barrel connector (1786-BNCP).
Be certain that:
•
you choose a convenient location to mount and route the cable.
•
the location does not cause any cable bend-radii to exceed the
limits listed on pages 3-1 and 3-2.
•
you route the cable in accordance with intrinsically-safe cable
routing specifications.
•
you do not mount the tap in a position that routes the drop
cable over any ac power terminals on nearby modules.
For This Coax Cable The Bend Radius Should Not Exceed
PVC 38.1 mm (1.5 in.)
Tap drop-cable 25.4 mm (1.0 in.)
IMPORTANT
If the barrel connector (1786-BNCP) is used, use an
intrinsically-safe insulator, the light-blue dust caps
we provide, or tape having a 500V insulation rating
to cover exposed metal parts. Local agencies require
their use for intrinsically-safe certification.