Sewha SI 480E - RS-232 Serial Interface; RS-232 Connection and Precautions

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SI 480E DIN SIZE WEIGHING CONTROLER
6-1-3. Serial Interface (RS – 232 ordering spec )
Serial communication interface is sensitive to electric noise.
Install isolated place from Power cable or other electric cables and wires,
and please use shielded cable for better performance.
GND(T+)
5 1 4 8 0 e