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4 modbus master with built-in rs485, Modbus master with built-in rs485 – In-Situ RDO PRO Process Optical Dissolved Oxygen Sensor Manual User Manual

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5.4

Modbus Master with Built-in RS485

Signal

Color

Ground/Return

Black

External Power (12-36 VDC) Red

RS485 (-)

Green

RS485 (+)

Blue

 Cable length must not exceed 1219 m (4000 ft.)

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Controller Requirements and Connections

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