1.3.1 Electrical equipment
The electrical equipment is located under-
neath the removable housing cover.
In addition to the torque switches
DE-S1
and
DE-S2
as well as three travel switches
WE-S3,
S4
and
S5
, the actuator can be equipped with
the following switching elements and measur-
ing instruments:
– One travel switch
WE-S6
– Two potentiometers
POT R1
and
POT R2
– One electronic position transmitter
ESR
– One
positioner
The axial movement of the actuator stem is
transferred via adjusting lever and slider to
the driving lever. The driving lever then pro-
duces a proportional rotary motion via gear
wheel as a measure for the two
R1
and
R2
potentiometers or the
ESR
positioner. The cam
discs located on the axis of the gear wheel
operate the switches
WE-S3, WE-S4, WE-S5
and
WE-S6 .
- DE-S1, DE-S2, WE-S3
DE-S1 switches off the motor depending on
the torque when the actuator stem extends
(final control element "CLOSED") .
DE-S2 switches off the motor depending on
the torque when the actuator stem retracts
(final control element "OPEN"), provided that
the final control element can be subjected to
load in "ON" position.
WE-S3 switches off the motor depending on
the travel when the actuator stem retracts
(final control element "ON"), provided that
the actuator stem has completed its travel as
indicated in the ordering text.
- WE-S4, WE-S5, WE-S6
The travel switches
WE-S4
,
WE-S5
and some-
times
WE-S6
are not adjusted. If required,
they can be adjusted/retrofitted as limit or
signal switch (see section "7 Adjustment and
calibration").
Fig. 2
⋅
Function of switches and potentiometers,
travel transmission
NOTE!
The
switching points
of
DE-S1
and
DE-S2
are
factory default and cannot be modified.
!
"#