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Connection method of Lyme LT208-S7 current sensor
You can ask the technical support engineer of LEM directly.

Actual wiring: 1 is connected to the positive power supply, which can be between+12V and+15V.

2 Connect negative power supply, which can be between-12V and-15V. Symmetrical power supply will improve accuracy.

3 is the output, and the current signal needs to be sampled as a voltage signal through resistance sampling.

No answer, hanging in the air.

Personally, I prefer to use Honeywell's current sensor. Honeywell's current sensors are more cost-effective than LEM, and they are all international brands. You can also compare similar products from Honeywell.