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Is there a max length that will work for serial communication?


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  • MVP 2021

In real field installation - RS232 with shielded cable can work at full speed for approx 20-50m.

Best way - use isolated RS485 (port 2) card inside V130 and use isolated PC USB to RS485 converter.

In this case on the lower speed (9600) and  even with unshielded cable - distance can be approx 1200m.

At high speed - shielded twisted wire (only two twisted  conductor inside) cable recommended but distance approx 500m is possible or even more.

Ideal solution - use optical RS232 extender but it is not cheap solution.

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