- Check the power supply wiring.
- Check whether the power supply voltage meets the specifications.
- Check the polarity of the input wiring.
- Use a tester to measure the input terminal voltage.
- For current input specifications, confirm that the accessory resistor is connected to the input terminal (applies to the VJ and M series).
- If the output signal is of the current specifications, attach an external 250 Ω resistance and measure the voltage.
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