The hardware includes quick-disconnect screw-terminal blocks for wiring to the load cells' strain-gage bridges
. In addition, instead of keeping the load cells fully energized at all times, which invites problems with thermal drift, especially in the poorly controlled environment of the shop floor, the hardware applies full excitation to a load cell only when its output is being measured.
The electrical design features two strain-gage bridges
, two instrumentation amplifiers, Tattletale control board, and a digital-to-analog converter.
Sensors can include full, half and quarter strain-gage bridges
, as well as inductive transducers, voltage and current inputs, thermocouples, potentiometers, or speed and torque sensors.