Rockwell Automation 1797-Series ControlNet Ex Media Plannng Installation Manual - Manual (Page 17)

Publication CNET-IN003A-EN-P - January 2006
Overview of the ControlNet Ex Media System 1-9
Two insulator kits are available:
•
Catalog number 1797-BOOT provides standard BNC trunk cable
insulators.
•
Catalog number 1797-INS provides a variety of the preformed
boots and insulators used with the ControlNet Ex system
products.
ControlNet Ex System
Installation Requirements You can connect a maximum of 48 ControlNet Ex taps with a total of
250m of coax cable when using fiber hub architecture. The maximum
distance increases to 1000m when you use only 2 taps.
Refer to Determine Trunk Cable Section Lengths on page 2-4 and see
the table below for more information.
Catalog
Number Catalog Name Description
1797-RPA ControlNet Ex
Modular
Repeater Adapter Represents one ControlNet Ex
node and must be connected to a
coax trunk cable by
1797-TPx
1797-RPFM ControlNet Ex
Fiber Repeater
Module, Medium
Distance Allows connection of a maximum
of two devices per 1797-RPA and
is powered directly by 1797-RPA
1797-ACNR15 Redundant
Media
ControlNet Ex
Adapter Represents one ControlNet Ex
node and must be connected to a
coax trunk cable by
1797-TPx -each one with two
redundant output channels that
are connected to different
ControlNet Ex networks (coax
cables and 1797-TPx)
1797-BCNR FLEX Ex
Redundant
ControlNet
Barrier Module Galvanic isolation barrier for
signal between the non-intrinsic
ControlNet system an
intrinsically-safe ControlNet Ex
system.
1797-TCAP ControlNet Ex
Tap (Dummy)
Terminator Represents one ControlNet Ex
node and is a simple capacitor
(56pF) with a coax connector
1797-TPx ControlNet Ex
Coax Tap Four types of connections
available: S (straight T-tap), R
(right angle T-tap), YS (straight
Y-tap), and YR (right angle Y-tap) -
a maximum of 48 taps can be
connected by coax trunk cable
1797-XT ControlNet Ex
Trunk Terminator Simple resistor (75
Ω
) with coax
connector that must be on each
end of the ControlNet Ex coax
trunk for termination