2
（４～２０ｍＡ）
（４～２０ｍＡ）
ＥＳＣ
Ａ／Ｄ
Ｉｎｐｕｔ Ｓｉｇｎａｌ
Ｏｕｔｐｕｔ Ｓ ｉｇｎａｌ
Ｔｏｒｑｕｅ Ｍｏｔｏｒ Ｐｉｌｏｔ Ｒｅ ｌａｙ
Ｅ／Ｐ ｔｒａｎ ｓｌａｔｏｒ
Ｓｅｎｓｏｒ
Ｏｐｅｒａｔｉｏｎ Ｐｒｉｎｃｉｐｌｅ
Ｏｕｔｐｕｔ／Ｉｎｓｕｌａｔｉｏｎ ｃｉｒｃｕｉｔ
Ｃｏｎｔｒｏｌｌｅｒ
Ｓｕｐｐｌｙ ｐｒｅｓｓｕｒｅ
PWM
HARTA/D
3. Operation principle
MP100 controls the degree of opening of the control valve in response to the input signal of 4 to
20mA, which is originating from the signal source, such as an electronic controller. Internal sensor
detects the degree of opening of the control valve.
MP100 captures the input signal and sensor information to the microprocessor. After the calculation,
the MP100 supplies the current necessary for the Torque Motor, and converts it to a pneumatic signal.
This pneumatic signal moves Pilot Relay, to adjust the air pressure that is output from the positioner.
It moves the driving portion of the control valve by the air pressure.
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