Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 58)

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3.7 Adding a Slave Drop to the
Remote I/O Network
Use the following procedure to add a Multibus rack, a Shark rack, a
Remote I/O Head, or a Remote Drive Interface Head as a slave drop
on the coaxial cable network:
Step 1.
Identify the route for the new cable segment(s). Refer to
the recommendations provided in section 3.3. If the new
drop is to be added at the end of the network, only one
new cable segment will be necessary. Otherwise, two new
cable segments may be needed.
Step 2. Calculate the new cable segment length. Ensure the new
total cable length does not exceed the maximum cable
length of 3,000 feet as defined in the network cable
specifications in Appendix F. If it exceeds 3,000 feet,
consult with Reliance Electric before going on to the next
step.
Step 3. Cut, install, terminate, and test the new cable segment
following the instructions provided in sections 3.4.
Step 4. Stop all application tasks.
Step 5. Refer to figure 3.26 and use the following procedures if a
new rack drop is to be added to one of the ends of the
network. Go to step 6 if a rack drop is to be added along
the cable route.
a.) Disconnect the terminating load from the tap of the
existing drop and replace it with one end of the new
cable segment.
b.) If you are adding a slave rack drop, connect the
terminating load to a new tap. If you are adding a
Head drop, connect the terminating load to a new BNC
Tee Adapter. Connect the other end of the new cable
segment to this tap (or BNC connector).
c.) Using a drop cable, attach the Remote I/O module or
the Shark Interface module to the new tap. For Head
drops, connect the BNC Tee Adapter directly to the
Remote I/O Head or Remote Drive Interface Head.
d.) Go to step 7.