There are two types of wiring for weighing sensors: 4-wire and 6-wire. There are also two types of wiring for modules or weighing transmitters: 4-wire and 6-wire. Whether to connect 4-wire or 6-wire depends on your hardware requirements. The principle is that sensors that can be connected to 6-wire should not be connected to 4-wire, and those that must be connected to 4-wire should be short circuited.

Generally, weighing sensors are six wire systems. When connected to a four wire system, the power lines (EXC -, EXC+) and feedback lines (SEN -, SEN+) are respectively short circuited. SEN+and SEN - are used to compensate for circuit resistance. SEN+and EXC+are pathways, while SEN - and EXC - are pathways.

EXC+and EXC - are used to power the weighing sensor, but due to circuit losses between the weighing module and the sensor, the voltage received by the sensor will actually be lower than the supply voltage. Each weighing sensor has a characteristic of mV/V, and the mV signal it outputs is closely related to the received voltage. SENS+and SENS - are actually high impedance circuits inside the weighing sensor, which can feedback the actual voltage received by the weighing module to the weighing module. Assuming EXC+and EXC - are 10V, with a line loss of 2mV/V for the sensor, the maximum output signal of the sensor is () * 2=19mV instead of 20mV. At this point, the weighing sensor will use 19mV as the maximum range internally, provided that the sensor must feedback the actual voltage to the weighing module through a feedback loop. Short circuit EXC+to SENS+and EXC - to SENS - on the weighing sensor is only suitable for situations where the sensor is close to the weighing module and the voltage loss is very small, otherwise there may be measurement errors.