blapcb
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I have a number of RJ45 connectors on a project, that are used either for serial communication or SPI. I cannot change the pinout. If the wrong device is plugged in to the wrong socket on the board, some bad connections can happen, and I am wondering how to protect against those conditions such as:
1. A Tx pin (-6v) on the board socket that might get connected to Ground pin of a device that is plugged in.
2. A pin on the board socket that supplies Vcc/3.3v to an external connected device, might get connected to Tx (-12v) of another external device (that is connected by mistake).
I can add protection elements either on the board or on the (cable of) the connected device, but can't change the pinouts.
Any solutions greatly appreciated
Thanks
1. A Tx pin (-6v) on the board socket that might get connected to Ground pin of a device that is plugged in.
2. A pin on the board socket that supplies Vcc/3.3v to an external connected device, might get connected to Tx (-12v) of another external device (that is connected by mistake).
I can add protection elements either on the board or on the (cable of) the connected device, but can't change the pinouts.
Any solutions greatly appreciated
Thanks