Azbil 100 Series - Page 70

5-10
Input signal 4-20mA
Input signal
INPUT mA
Input signal
INPUT %IIN
EPM drive signal
INPUT %DUTY
Valve position
signal
OUTPUT
% STROKE
Input current correction
Input signal ranging
PID control calculation
Zero and span ranging
Valve position detection
EPM
Positioner direct/reverse
Pilot relay
Pneumatic signal amplier
Actuator
Actuator direct/reverse
Valve
Valve plug direct/reverse
Forced fully open/fully
closed signal conversion
Flow characteristics
signal conversion
+
-
VTD
Fig. 5-8. SVP I/O flow