Fairbanks NexWeigh - Manual (Page 33)

Section 4: Programming Configuration
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4.5.4. 4-20mA output setup
Introduction
The 4-20mA analog output is passive, so therefore it requires the receiving element
to supply the loop with a dedicated, isolated power source from 7-40V DC. The
output is linear throughout the range from 4mA to 20mA, and can be programmed to
increase (upweigh) or decrease (downweigh) as weight is increased.
Connections are as follows:
Pin 1 + 4-20mA
Pin 2 – 4-20mA
Press and hold the UNITS key until the instrument displays 4-20
followed by either GroSS or nEt . This determines whether the
output will follow the gross or net weight. Press
OVER/UNDER/NEXT to toggle between the two choices and
select the desired mode. Press PROGRAM/ENTER to enter
the selected choice.
Instrument will now display 4-20.Lo followed by a weight value with the left digit
flashing, and the primary units LED lit for programming reference. This is the weight
at which the output will be 4mA. Please note that at this time the output will be forced
to 4mA to allow the user to verify that the receiving device is set properly.
Press UNITS to increase the digit, press the 1 key to decrease the flashing digit.
Press OVER/UNDER/NEXT to move the flashing digit to the right or press the
TARE to move it to the left. Press PRINT to move the decimal point to the right.
Press PROGRAM/ENTER when the display shows the desired weight value.
Instrument will now display 4-20.Hi followed by a weight value with the left digit
flashing, and the primary units LED lit for programming reference. This is the weight
at which the output will be
20mA . Please note that at this time the output will be
forced to 20mA to allow the user to verify that the receiving device is set properly.
Press UNITS to increase the digit, press the 1 key to decrease the flashing digit.
Press OVER/UNDER/NEXT to move the flashing digit to the right or press the
TARE to move it to the left. Press PRINT to move the decimal point to the right.
Press PROGRAM/ENTER when the display shows the desired weight value to
return to normal weighing.