Download Operating Instructions Type 8694 Positioner TopControl Basic

Transcript
Type 8694
System description
5.4.3
Function diagram of the positioner with single-acting
actuator
The illustrated function diagram describes the function of the positioner (Type 8694).
external
position
set-point value
Positioner
Actual
position
Position
controller
Control system
1
Position
measuring
system
2
Control system
1: Aeration valve
2: Bleed valve
Pressure
supply
Exhaust air
Pneumatic actuator
(single-acting)
Valve
(actuator)

Figure 3:
Function diagram
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