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The "USB" port is really an RS232 serial port that is powered by the host computer. 12Vdc. The other ports are RS485. The coil is a Common mode choke for RFI blocking in and out.
Interesting! 👏
The "USB" port is really an RS232 serial port that is powered by the host computer. 12Vdc.
The other ports are RS485.
The coil is a Common mode choke for RFI blocking in and out.
Interesting! 👏