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