ESBE ALH 4 Series, Руководство пользователя

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18
GB
Picture 3, chapter 5a
Dip
Switch
Description OFF ON
1
Feedback signal
Select between 2-10V and 0-5V feedback voltage output.
2-10V DC 0-5V DC
2
Control signal—MOD / INC
Series ALHxx4 is either controlled by a variable direct
voltage, for a modulating signal (MOD), or by a 3-point
increase/decrease signal (INC).
Prop. control signal,
picture A 3-Point Floating control signal, picture
B
3
Sequence or parallel control— – – – / SEQ (2)
With sequence (or parallel) control (SEQ), two actuators/
valves can be controlled with one control signal. For each
actuator using part signal control it is possible to determi-
ne which voltage range to use (See switch 5).
If the switch NORM / INV is in the NORM position, the
higher voltage corresponds to 100% flow and the lower
voltage to 0%. With the INV position selected the opposi-
te function is obtained
Normal operation SW 2 off, SW 3 on, SW 4 select base
range
(0-10 or 2-10) SW 5 select sequence
range.
4
Input Voltage range—0-10 / 2-10
Choice of either 0-10V or 2-10V input control voltage
signal. 0-10V DC 2-10V DC
5
Operational voltage range (SEQ / SPLIT) sequence
(3)
When switch 3 (SEQ) ON Choice to split operational
voltage range as follows:
Off: low: 0 - 5 V (2 - 6 V), On: high: 5-10V (6 - 10 V)
0-5V DC or 2-6V
DC
5-10V DC or 6-10V DC
6
Running time—60 s / 300 s (floating control only)
On increase/decrease control, it is possible to select the
running time between 60s or 300s.
With modulating control, the running time is always 15 s
/ 20 s / 30 s depending on stroke.
60 s 300 s
7
Direction of movement—NORM / INV
The Norm / INV switch reverses the actuator direction
of movement relative to signal change. With the switch in
the NORM position, the actuator spindle moves up when
the signal decreases. With the switch in the INV, the
actuator spindle moves down when the signal decreases.
This switch will
change the
proportional or
floating input
signal to direct or
reverse action. This switch will change the proportional
or floating input signal to direct or
reverse action similar to switch 1.
8
Flow Curve Linearization—NORM / LIN/LG
With the linearization switch then valve flow
characteristic can be modified. Selecting LIN/LG
will change characteristics of an equally modified
percentage (EQM) valve to behave in a linear function.
It will also change a valve designed for linear flow to
operate with ”Quick opening characteristics”. i.e. with a
small control signal, the valve will open quickly to allow
high flow control.
Normal Used to adjust the actuators linear
or logarithmic characteristics. With
this setting, the characteristics of an
equally modified percentage valve can
be modified to almost linear and a linear
valve can operate with “quick open”
characteristics based on the application
requirements.
9
Input signal and stroke Calibration OP / ADJ
Switch used to calibrate the actuator stroke with the
valve end positions during the actuators commissioning.
By momentarily placing the switch in the ON position,
the actuator will automatically find the end positions of
the valve. At the end of the adjustment all the other dip
switch settings (1 to 8) will be registered again.
Stroke calibration will only be initiated once power is
applied to the actuator and the user has triggered this
switch. The ALH actuator is delivered pre-programmed
for valves with a 20mm stroke
Normal
Note: Switch 9
must be in the
off position for
normal operation. Used to calibrate the valve stroke limits.
With the actuator powered, turn switch
9 on, then off.
DIP SWITCHES
5b