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Power supply via UPS, leakage sensor, other UART devices
#2
1. i suggest you reduce 13.8v-->12v. because the relay's coin is dc12v, it's long time with 13.8v, will be hot , not good for relay life.

2. sure, if you can jump RXD,TXD to your own PZEM-007T's serial port, it's ok, just confirm the serial level whether is 3.3v level.

3. if you want digital input use dc12v is ok, not suggest to use 13.8v, you can connect several diodes in series to reduce voltage.
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RE: Power supply via UPS, leakage sensor, other UART devices - by admin - 09-18-2023, 02:51 AM

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