Automation Ebook

Determine Loadcell Wire Color

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Statistical load cell wire color chart of popular load cell brands

How to wire Loadcell

Standard load cells usually have wire colors and connections as follows: power supply is usually from 5 to 12V

The feed will be related to the output value

+ For example, Loadcell 50Kg 1mV/V, 10VDC power supply, when placing 50kg on the loadcell, the mV Out value (Sig+ and Sig-) = 10mV is returned to the loadcell reader.

+ For example, Loadcell 50Kg 2mV/V, 10VDC power supply, when 50kg is placed on the loadcell, the mV Out value (Sig+ and Sig-) =20mV is returned to the loadcell reader.

How to re-identify wires

+ Step 1: Use a meter to measure the resistance of wire pairs together:

+ Step 2: Eliminate pairs with nearly equal measurements. The remaining 2 pairs have different resistances: the pair with the larger resistance is the power supply pair, the pair with the smaller resistance is the signal pair. In this example, source pair: Red-Black, Signal: Green-White

+ Step 3: Install it on the scale head, see if the direction of impact is correct, the number of scales is correct. If it is reversed, reverse 1 of the 2 pairs.

Note: In the case of a 6-wire load cell, it comes with 2 anti-interference wires Sen+ and Sen-, Sen+ is connected to EX+ and Sen- is connected to EX-, it is easy to use a continuity meter to determine.

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