Application Notes

EAP-031035

I am measuring motor temperature. An RTD is connected to the motor and I like to transmit the data to a PLC located off site over the Modbus communication. A PLC may be used to control the load to the motor or to shut down the motor as needed to prevent burnout.

M-System's Mini-M model M2XUM is a universal input signal conditioner with Modbus RTU communication output. M2XUM is also incorporated with analog output. The load resistance is available max. 750 ohms with the 4-20mA output which can drive a local indicator.

Standard	Conforms to RS-485, EIA
Transmission distance	500 meters max.
Baud rate	38.4 kbps max.
Communication	Half-duplex, asynchoronous, no procedure
Protocol	Modbus RTU
Transmission media	Shielded twisted-pair cable (CPEV-S 0.9 dia.)

Circuit Diagram of model M2XUM

M-System has flexible solutions to meet your specific application and requirements. Consult our Signal Conditioners Data Library.