Rockwell Automation 1797-Series ControlNet Ex Media Plannng Installation Manual - Manual (Page 40)

Publication CNET-IN003A-EN-P - January 2006
2-18 Plan a ControlNet Ex Media System
Plan Your Network
Refer to this list when you plan your network.
•
Maximum of 99 nodes (excluding fiber repeater hubs)
•
Fiber repeater hubs require a tap but are not counted as nodes
(they are included in the number of devices allowed per
segment [48])
•
Fiber repeater hubs may be installed at any tap location along a
segment
•
There can be only one path between any two points on a
network
•
The configuration of both sides of a redundant segment must be
the same
•
The total cable difference between the two sides of a redundant
network cannot exceed 800 m (2640 ft)
Order Parts
The following table contains a list of ControlNet Ex Components.
Refer to the ControlNet and ControlNet Ex Media System Components
List, publication AG-PA002, for a list of other ControlNet parts.
Item Cat. No. Guidelines
Required Quantity 1
Taps
Straight T-tap
Straight Y-tap
Right-angle T-tap
Right-angle Y-tap
1797-TPS
1797-TPYS
1797-TPR
1797-TPYR
You need a tap for each connection to the
trunk cable (nodes and repeaters).
Each tap kit contains: two BNC connector
kits, one dust cap, one universal mounting
bracket, ControlNet Ex cable labels and
two screws
Number of repeaters x 2
+
Number of nodes
Trunk Terminators 1797-XT
(quantity of 50)
You need a terminator for each end
of each segment.
Number of segments x 2
Trunk Cable Use the ControlNet Ex Media System
Component List, publication AG-PA002,
to order your required length of cable.
Follow guidelines on page 2-4
of this document to determine
cable length
Tap Terminator 1797-TCAP
(quantity of 5)
Use the dummy load to plug into drop
cables that are not attached to a node. One for every drop cable that is
not attached to a node