Keep in mind that if more than one laod sensor is connected to the same power supply you only need to connect the ground screw to only one ground otherwise a ground loop may be created causing additional noise.
Load cell wiring connection.
The following diagram will demonstrate the correct wiring configuration for a load cell to a differential input.
For example di 145 di 149 and di 155 units are economical choices.
It is a common misconception that the possibility to sense the actual voltage at the load cell is the only difference between 4 wire and 6 wire load cells.
The sense wires of the 6 wire load cell can be connected to the sense terminals of the weight indicator to measure and adjust the amplifier on the actual voltage of the load cells.
A six wire cable besides having excitation and signal lines also has and sense lines.
When connecting a 6 wire load to a 4 wire system the sense wires should be connected to the same place as the input wires.