Hardy HI 6500 Series - Manual (Page 33)

Installation 25
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Connecting to a Hardy Junction Box or Summing Card
Junction Box Wiring Diagram
NOTE When connecting two IT Junction Boxes together to connect 8 load points, you must run an
external 5 Volt DC power supply if you will run C2 cabling a long distance. You cannot use
a higher voltage power supply due to over voltage damage to your Hardy controller. For
more information, visit the Hardy Knowledgebase Answer #1370 or search under external
excitation voltage.
Excitation monitor is the current draw on the excitation voltage from the weight controller.
When using an external power supply the excitation monitor will not function properly. The
internal excitation voltage is not being used, therefore no current draw, and the excitation
monitor will improperly report a failure. You should ignore the error bit or turn the
excitation monitor off.