38 THE BLUE BOX LT MAKING UP CAT. 5 CABLE WITH RJ45 CONNECTORS
LCDBBMUCAT03Sept08
LC&D ships all relay panels with caps for the RJ45 connec-
tors to get rid of the possibility of contamination.
SUMMARY
There is a lot to know about making good Cat.5 cables
with RJ45 connectors. The purpose of this guide is to
cover the basics of crimping Cat.5 cable; which is vital to
LC&D system installation, operation and maintenance.
Please follow the steps outlined in this guide thoroughly; if
you have any questions or need assistance call Tech Sup-
port (800) 345-4448.
STABLE DATUMS ON CRIMPING CAT.5
Ethernet cabling standards are different from our GR 1.
2400 Cat. 5 cabling. Ethernet cables max out at 100m
(330ft). RS485 can go to 4000ft.
A cable can pass a LAN cable test but still cause an un-2.
stable bus, no matter how expensive the cable tester.
Inconsistent crimping causes problems in a network. The 3.
expression “weakest link in the chain” really applies on a
DAISY CHAINED system. If there is a bad connection in
the chain, nothing on the far side of that connection can
communicate back to the beginning of the chain.
Inconsistent crimps that may work fine on an Ethernet 4.
network may yet cause problems on a “multi-drop” or
“daisy chained” bus.
Professionally made wires use stranded RJ45 cable. Al-5.
ways use stranded wire. It is only slightly more expen-
sive than solid cable and yet can save hours and hours
of tracking down and correcting bad crimps.
LC&D can only recommend EZ-RJ45 brand modular 6.
connectors.
The EZ-RJ45 brand crimper that also cuts off the wires is 7.
NOT recommended since it still produces bowed crimps
no matter how many times you hit the crimp. The recom-
mended crimper is provided in the LC&D crimper kit.
It’s also widely available from other suppliers who private
label the same crimper. They all look the same.
MISCELLANEOUS INFORMATION (Continued)
When you crimp an RJ45, always crimp it down multi-8.
ple times to ensure properly aligned and evenly seated
contacts on the connector.
Never bend Cat. 5 with a radius of less than 1". Cut out 9.
and throw away sections of cables that have been kinked
and straightened out. They can cause drop outs.
Always VISUALLY inspect crimps. This one action can 10.
save a lot of work. Always follow up with a cable tester
once both ends of the cable have been crimped.
LC&D CRIMP KIT - Ships with 50EZ RJ45 Connectors and
is provided at LC&D cost.
RECOMMENDED CRIMPER - Patented Taiwan
LIGHTING CONTROL & DESIGN
905 Allen Ave • Glendale, CA 91201 • Support 800-345-4448 • www.lightingcontrols.com
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