Function.diagram; Diagram Illustrating Single-Acting Actuator - EBRO ARMATUREN EP 501 C Operating Instructions Manual

7.2. Function diagram
7.2.1.

Diagram illustrating single-acting actuator

The black lines in "Figure 2" specify the function of the positioner circuit in Type EP 501.
The grey part of the diagram indicates the additional function of the superimposed process control circuit in Type
EP 501 C.
Position set-
point value
Process.
set-point.
value
Process.
actual.
value
Sensor
Figure 2: Structure, positioner Type EP 501 / process controller EP 501 C
The remote design has the position sensor situated outside the device directly on the continuous valve
and is connected to the latter by a cable.
16
Type.EP.501./.EP.501.C
Positioner
Actual position
Nominal position
Process.
controller
* Control system
english
Compressed-
air supply
1
2
Control
system*
Exhaust air
Position
sensor
1: Aeration valve
2: Bleed valve
Typ EP 501
Description of System
Continuous.valve.with..
single-acting.actuator