Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 21)

Chapter 2
Installing a Network
2–8
5. Inspect the locations where the cable has been run, using a different
person than the installer. Make sure that the cable:
a. Is not run parallel to AC cables (BUILDING POWER) for more
than a few feet at any time. This will avoid induction of AC onto
your low voltage data network. Whenever the network cable must
cross AC power lines, they should cross perpendicular to each
other.
b. Is not allowed to rest on top of fluorescent lamps in the ceiling. The
ballasts from these lamps are worse than AC power lines.
c. Is never spliced in a manner that allows the cable to make a 3-way
junction. Network cables must be a bus. Only the Master
workstation and the last workstation can have a single network
cable going to them; all others will have two cables.
d. Is not located next to or run over large motors, building
transformers, or very large current areas, such as radiology labs.
e. Is not located where it is easily broken or shifted around.
Note: Make sure that the workstations are not next to building
transformers, or large electric motors. Induced voltage spikes can affect
the operation of the network.
6. Inspect visually every connector. It is recommended that a person, other
than the one who connected the wires, inspects the following:
a. Correct COLORS of wire have been connected.
b. Be sure that ALL of the strands of the conductor are properly
inserted into the connector. It is very easy to nick the wire when
stripping it. This results in the strands breaking.
c. Flex the wire at the connector a few times (this is not the time to
prove your strength, THEY CAN BE BROKEN) to see if the wire
has been badly nicked. It will break if this has occurred.
7. Inspect the pins for proper color in the proper hole.
8. Check continuity of the network cable by:
a. Temporarily short pins 4 and 5 of the MASTER workstation’s
network connector together. You can do this with a clip lead, or use
a female 9 pin solder type connector with pins 4 and 5 soldered
together. (You can get solder type connectors at local electrical
retailers.)
b. Set the voltmeter to the 100 OHM scale (or the nearest available
value).
Step By Step Installation
(cont’d)