Samson 3730-2, Mounting And Operating Instructions

Page: 60 / 128

60 EB 8384-2 EN
Operating controls and readings
6 Operating controls and
readings
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
: confirm 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 fixed 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
VA
LV
E
ACTUA
TES
MIN SIDE MAX BACK MIN BACK
MAX SIDE
Q
%
S
mm
%
S
mm
SERIAL INTERF
ACE
%
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. 21: Operating controls