Samson 373 Series User Manual

EB 8384-2 EN 91
Operation
6 Operation
Rotary pushbutton
The rotary pushbutton is located underneath
the front protective cover. The positioner is
operated on site using the rotary pushbutton:
Turn : Select codes and values
Press
:conrmsetting.
AIR TO OPEN/AIR TO CLOSE slide switch
− AIRTOOPENappliestoavalveopening
as the signal pressure increases.
− AIRTOCLOSEappliestoavalveclosing
as the signal pressure increases.
The signal pressure is the pneumatic pressure
at the output of the positioner applied to the
actuator.
Volume restriction Q
The volume restriction serves to adapt the air
output capacity to the size of the actuator.
Depending on the air passage at the actua-
tor,twoxedsettingsareavailable.
− Foractuatorssmallerthan240cm²and
with a signal pressure connection at the
side(Type3271-5),setrestrictiontoMIN
SIDE.
− Foraconnectionattheback(Type3277-
5), set restriction to MIN BACK.
− Foractuators240cm²andlarger,setto
MAX SIDE for a side connection and to
MAX BACK for a connection at the back.
%
mm
AIR TO
OPEN CLOSE
INIT
CAUTION
VALVE
ACTUATES
MIN SIDE MAX BACK MIN BACK
MAX SIDE
Q
%
S
mm
%
S
mm
SERIAL INTERFACE
%
mm
Initialization key Cap and rotary switch Metal tag of proximity switch
SSP interface
SwitchforAIRTO
OPEN/AIRTO
CLOSE
Volumerestriction
Rotarypushbutton
Fig.34: Operating controls

Samson 373 Series Specifications

General

Brand	Samson
Model	373 Series
Category	Valve Positioners
Language	English