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Triac speed controllers ERV ..TMB

The triac speed controllers ERV ..TMB are designed to change the motor rotation speed by changing the output voltage. Controllers have function of the triac thermoprotection. The regulation of the motor rotating speed is stepless from the set minimum inside of the controller up to the full supply voltage on the controllers output. The rotating speed setpoint can be done with knob which is located on the cover of the controller or with the external control signal 0-10VDC, by the interface RS485 MODBUS. The controller work mode can be changed with the external relay contacts. The controllers also have ON/OFF switch with the green power supply indication. The fuse is installed in the controller for a safety work. More then one motor can be connected to the controller, if total current of all motors is less than maximum controller current.