Rockwell Automation 1786-series ControlNet Fiber Media Planning and Installation Guide - Manual (Page 49)

Rockwell Automation Publication CNET-IN001C-EN-P - October 2011 49
Guidelines for Fiber-optic Installation Chapter 3
7. Place a one-sheave cable block or snatch block within 0.3 m (1 ft) of the
pole at the end of the pull. Make sure the winch is positioned to avoid steep
angles exiting the block.
8. Thread the towline through the all of the cable blocks and the cable guide
to the end of the cable for aerial placement.
9. Attach the towline to the cable by using direct or indirect attachment as
your application dictates.
10. Establish communications between the cable payoff station, intermediate
hand assist stations, and the pulling station.
11. Pull the cable slowly by using the towline and winch.
12. Reverse the payoff reel by hand to rework any excessive sag between guide
blocks after the pull is completed and the pulling end is anchored. Use the
payoff break to maintain the proper tension.
13. Measure and record the optical cable attenuation and length by using
either an
OTDR (optical time domain reflectometer) or an optical test.
14. Tighten the strand suspension clamps at the poles where the cable is to
be lashed.
15. Lashing should begin immediately after the cable has been placed.
16. Pull the lasher toward the cable reel.
Always take up the slack of the unlashed spans by reversing the payoff reel
slowly by hand.
17. Remove the cable blocks as the lasher progresses towards the payoff reel.
18. Secure the strand wire to keep it from loosening on the previously lashed
span as the lasher is transferred from strand to strand.
19. Proceed with the lasher until each lash is complete.
20. Leave enough extra cable to route to the equipment rack, put connectors
on, and allow for future repairs when your pull is complete.
21. Seal the ends of the cable with endcaps until they are terminated.
IMPORTANT Do not exceed the maximum pulling tension as specified by the
manufacturer of your cable.