How to wire the weighing sensor

How to wire the weighing sensor

The wiring methods of weighing sensors mainly include four wire and six wire systems. The advantage of the four wire wiring method is that it has loose requirements for instruments and is easy to operate. However, when the cable is long, it may be affected by external factors such as environmental temperature fluctuations. The six wire wiring method can effectively resist interference such as environmental temperature fluctuations, and is particularly suitable for precision measurement and long-distance measurement scenarios. However, the instruments used in conjunction with it need to have feedback input interfaces. ‌

Four wire wiring method

Power cord: red (positive excitation) and black (negative excitation).
Signal line: green (positive signal) and white (negative signal).
Shielded wire: used to reduce electromagnetic interference.

Six wire system wiring method

Power cord: red (positive excitation) and black (negative excitation).
Signal line: green (positive signal) and white (negative signal).
Feedback lines: blue and yellow.
Shielded wire: used to reduce electromagnetic interference.

Precautions for wiring

The use of shielded cables: All wires leading to or from the display circuit should use shielded cables, and the connection and grounding points of the shielded wires should be reasonable.
Prevent interference: The sensor output signal readout circuit should not be placed in the same box as devices that can cause strong interference (such as thyristors, contactors, etc.). If this cannot be guaranteed, consideration should be given to setting up barriers for isolation between them.
Electrical bypass: Sensors should use hinged copper wires (with a cross-sectional area of approximately 50mm ²) to form an electrical bypass to protect them from the hazards caused by welding currents or lightning strikes.
Electrical connection: In terms of electrical connection, the signal cables of sensors should not be arranged in parallel with strong power lines or control lines. If they must be placed in parallel, the distance should be kept at least 50cm, and the signal lines should be covered with metal tubes.
Overload protection: Although the weighing sensor has a certain overload capacity, it should still be prevented from overloading during the installation of the weighing system. During the installation process, if necessary, a pad of the same height as the sensor can be used to replace the sensor first, and then the sensor can be replaced.