EB 8355-2 EN
5-3
Installation
Proceed as follows:
Î
Lay out the necessary material and tools
to have them ready during mounting.
Î
Determine the operating direction of the
positioner control loop (see sec-
tion
Î
Remove the protective cover on the back
of the positioner.
Î
Remove the protective caps from the
pneumatic connections.
5.2.1
Determining the
operating direction of
the positioner control
loop
Operating direction increasing/increasing
<<
−
The signal pressure p
st
rises as the input
signal p
e
(set point) rises
−
The signal pressure p
st
decreases as the
input signal p
e
(set point) decreases
Operating direction increasing/decreasing
<>
−
The signal pressure p
st
decreases as the
input signal p
e
(set point) rises
−
The signal pressure p
st
rises as the input
signal p
e
(set point) decreases
On the turnboard (7), the operating direction
is indicated by symbols (direct
<<
, reverse
<>). Depending on the position of the turn
-
board, the adjusted operating direction and
the associated symbol is visible. If the re-
quired operating direction does not corre-
SUPPL
Y
Actuator stem extends
Actuator stem retracts
Internal signal pres-
sure connection
Side view of connection block
Signal pressure
connection over piping
Connection block
Tip of gasket (16)
Operating
direction >> Left
attachment
Operating
direction <> Left
attachment
With gasket
(new)
With switch plate
(old)
Switch plate (13)
Gasket (16)
Cover
Switchover plate
Signal pressure input
Signal pressure
input for left
attachment
Seal with
filter
With right
attachment
Marking
Marking
Symbol
Actuator stem extends
Actuator stem retracts
Operating
direction <> Right
attachment
Actuator stem extends
>> Operating direction <>
Left attachment
Right attachment
Actuator stem retracts
<> Operating direction >>
Left attachment
Right attachment
Operating
direction >> Right
attachment
Fig. 5-1:
Mounting position and connection of signal pressure for Type 3277 Actuator (top) and
Type 3277-5 Actuator (120 cm²) (bottom)
Содержание 3767
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