Rockwell Automation 1797-Series ControlNet Ex Media Plannng Installation Manual - Manual (Page 33)

Publication CNET-IN003A-EN-P - January 2006
Plan a ControlNet Ex Media System 2-11
•
Install the cable system so that the trunk cables at any physical
device location can be easily identified and labeled with the
appropriate icon or letter. Each redundant ControlNet Ex device
is labeled so you can connect it to the corresponding trunk
cable.
•
Both trunk cables (trunk cable A and trunk cable B) of a
redundant-cable network must have identical configurations.
Each segment must contain the same number of taps, nodes and
fiber repeaters. Connect nodes and fiber repeaters in the same
relative sequence on both trunk cables.
•
Either side of a redundant-cable network may differ in cable
length. The total difference in length between the two trunk
cables must not exceed 800 m (2640 ft).
Trunk Cable A =
Trunk Cable B =
41683
Node 1
Node 1
Node 1
1 Node Supporting Redundant Media
Trunk Cable A =
Node 1
Segment 1
Segment 2
1797 Fiber
Repeater Hub
Trunk Cable B =
1797 Fiber
Repeater
Hazardous Area
Node 1
1
.
.
.
.
1 2 4 3 +V -V +V -V
Q UAL IT Y B - A Allen-Bradley 1797 - RPA
ControlNet E x REPEATER ADAPTER Comm
Status Module
Status PWR
.
.
.
Recv Xmit Recv Xmit
Chan 2 Chan 1
1797 - RPFM Q UAL I TY B - A Allen-Bradley
ControlNet E x FIBER MODULE
MEDIUM RANGE
.
1
.
.
.
.
1 2 4 3 +V -V +V -V
Q UAL IT Y B - A Allen-Bradley 1797 - RPA
ControlNet E x REPEATER ADAPTER Comm
Status Module
Status PWR
.
.
.
Recv Xmit Recv Xmit
Chan 2 Chan 1
1797 - RPFM Q UAL I TY B - A Allen-Bradley
ControlNet E x FIBER MODULE
MEDIUM RANGE
.
1
.
.
.
.
1 2 4 3 +V -V +V -V
Q UAL IT Y B - A Allen-Bradley 1797 - RPA
ControlNet E x REPEATER ADAPTER Comm
Status Module
Status PWR
.
.
.
Recv Xmit Recv Xmit
Chan 2 Chan 1
1797 - RPFM Q UAL I TY B - A Allen-Bradley
ControlNet E x FIBER MODULE
MEDIUM RANGE
.
1
.
.
.
.
1 2 4 3 +V -V +V -V
Q UAL IT Y B - A Allen-Bradley 1797 - RPA
ControlNet E x REPEATER ADAPTER Comm
Status Module
Status PWR
.
.
.
Recv Xmit Recv Xmit
Chan 2 Chan 1
1797 - RPFM Q UAL I TY B - A Allen-Bradley
ControlNet E x FIBER MODULE
MEDIUM RANGE
.