Cumberland 074-11772, Owner'S Manual

Page: 31 / 102

Chapter 3: Basic connections
IMPORTANT: Make sure each loadcell is connected to the proper signal. False alarms can result if the
wires are not properly connected.
CAUTION
Disconnect supply before servicing.
WARNING
Lock the enclosure by screwing when wiring is complete or when servicing.
WARNING
Installation must only be performed by qualified service personnel.
Refer to the wiring diagrams for more information.
Grounding
The EDGE Bin Scale only needs a functional Earth at the EDGE Bin Scale side. The functional Earth con-
nector is located at J5.
The Bulk Feed Tank and the loadcells must use a Protective Earth. The Bulk Feed Tank and the loadcells
must be grounded directly on the Earth. The silo metal body should be grounded locally by using rods.
The ground rod resistance must not exceed 5 Ohm. Make The Bulk Feed Tank installation in accordance
with local and national safety codes. Certain codes and standards must be followed when lightning pro-
tection systems are installed. Standards and sources are listed below:
LPI-175: The lightning protection code, published by the Lightning Protection Institute.
NFPA 78: National Fire Protection Association Lightning Protection Code.
ASAE EP381: American Society of Agricultural Engineers, Engineering Practice.
96AUL: Requirements for Master Label for Lightning Protection, developed by Underwriters'
Laboratories.
891–00577 EDGE Bin Scale 3 Wires LC 31