Burkert 3280 - Page 12

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Product description
Type 3280, 3285
Both valve end positions are indicated by the LED status. Moreover, the position actual value recorded using the
position measuring system is output via the M12 circular plug-in connector.
It is possible to communicate with the device digitally via CANopen* or büS**.
* CANopen - A CAN-based fieldbus (Controller Area Network) used in automation technology to link
devices.
** büS - A CANopen-based fieldbus with additional functions.
The positioner version also features some special functions (see chapter “8.3.1”), which can be set up using the
Bürkert Communicator.
The operating instructions for the Bürkert Communicator can be found at www.burkert.com
Process controller:
The additionally implemented PID controller can perform not only the actual position control but also a process
control in the sense of a cascade control.
Position controller
Position control circuit
CMD CTRL POS
Z1
POS
Valve opening
+
Xd1
-
Position measuring
system
Continuous valve
Electromotive
actuator
Position
set-point
value
Process controller
Position
control
circuit
SP
CMD
Z2
PV
Process variable
+
Xd2
-
Transmitter
Process
Process
set-point
value
Valve
opening
Figure 4: Signal flow diagram process controller
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