The digital control electronics, Type 8605, serves to operate proportional solenoid control valves in the power range from 40 - 2000 mA. The electronics converts an external standard signal into a pulse-width modulated (PWM) signal with which the opening of the proportional valve and hence a fluidic output parameter (e.g. flow rate) can be infinitely varied. An internal current control with the duty factor of the PWM signal as manipulated variable ensures that every value of the input signal, irrespective of the thermal condition of the coil, is unambiguously assigned a given value of the effective coil current. A display and operating keys allow the electronics to be easily adapted to a particular proportional valve and to the concrete conditions of an application.

• Programmable digital electronics
• Converts an anaog input signal to a PWM output signal
• Adjustable PWM frequency
• Cable plug and DIN rail version

Thanks to its compact design, the universal 8611 controller is especially designed for compact control system applications.It is compatible and tested with all Bürkert proportional valves and sensors and can be connected with every none-Bürkert Control valve by standard signal (4-20 mA, 0-10 V or PWM-output). The proportional & Integral (PI) process controller is equipped with many additional functions. The process value feedback can be supplied as one of three analog inputs; a standard signal (4-20 mA/0-10V), frequency or RTD signal; directly to the universal controller. The process switching points can be set via a 4-20 mA or 0-10 V signal or with the keypad For temperature specific control, it is possible to set a cascade structure with both temperature and flow as inputs. Thanks to the proportional control capabilities, a wide range of control functions can be performed in a variety of liquids and gas medias.

• Continuous, 2-point, 3-point and On/Off control
• Ratio control function
• Sensor inputs (4-20 mA, 0-10 V, frequency, RTD)
• Control of proportional, process and motor valves
• Bürkert proportional valves and flow meters are memorized