The device Type 8793 digital process controller is designed with standardisation

according to IEC 60534 - 6 - 1 or VDI/VDE 3845 (IEC 60534 - 6 - 2) for assembly to

linear and rotary actuators. The variant with remote position sensor can also be

used to control Bürkert process control valves. The process controller processes

all standard current and voltage signals and can also be equipped with the fieldbus

interface. The actual process value is supplied directly to the device as 4 - 20 mA,

PT100 or as a frequency signal. The process controller calculates the position

setpoint for the subordinated positioner via variance comparison. The parameterisation

of process and position controllers can be carried out automatically via the

Tune function. Operation is simple via the graphical display with keypad or via

Bürkert Communicator. The process controller is equipped with diagnostic functions

to monitor the valve. The diagnostics can be used to monitor the operating

conditions of the control valve which makes maintenance decisions predictable

and optimises the availability of the plants as required. The pneumatic actuating

system can be used equally for single-acting and double-acting actuators. It is

characterised by a defined safety response in the event of the failure of the electrical

or pneumatic auxiliary power and possesses an enormous air capacity range

with pressure supply up to 7 bar.

Type description