Design a system by which a control signal of 4 to 20 mA is converted into a force of 200 to 1000 N.
Use a pneumatic actuator and specify the required diaphragm area if the pressure output is to be in the range of 20 to 100 kPa. An I/P converter is available that converts 0 to 5 V into 20 to 100 kPa.