Standard requirements for the use of belt scales for electrical wiring
If the electrical equipment such as the instrument and the inverter are installed in the same control cabinet, it is recommended to add a first-order filter before the power supply of the instrument. The closer the filter is to the instrument, the better. When multiple instruments are installed together, the instrument power supplies can be connected in parallel and connected to the output of the filter. Adding a high-frequency filter to the inverter before and after to reduce the influence on other equipment, the filter can be made with a large magnetic ring, 4 power lines can be 3-5 turns in the same direction on the magnetic ring, and the inverter input and output The power cables must be twisted together and wired with a 4-wire cable. The three output power cables of the inverter must not be connected to the terminals through different channels. The signal line of the load cell and displacement sensor should be shielded wire of 1.0m m2 or more. The electrical wiring of the electronic belt scale must not use ordinary copper wire. The shielded wire should be laid by metal protection tube or metal bridge as much as possible. Weighing sensor and displacement signal of the sensor shielded conductor shield only at one end, such as ground or chassis ground sensor supply instrument, if installed with several meters, may be the same voltage level, the same type of wiring lines together.
Signal lines of different voltage levels and power lines and switching input and output lines should be laid separately and kept as far as possible.
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