Spring return function
If the positioning signal is interrupted, or in the event of a power failure, the valve’s return spring will automatically close the control path A to AB.
Manual control
By pressing (a) and turning (b) the hand wheel
As soon as the hand wheel is pressed and turned, neither the forced control signal Z, nor the input signal Y or the phase-cut signal acts on the actuator. The green LED will flash. For automatic control, the hand wheel must be set to the Auto position. The green LED will be lit. |
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Operating and display elements in the electronics housing | ||
| 1 | Connection terminals |
2 | LED for indication of operating state
| |
3 | Slot for autocalibration | |
4 | DIL switch for mode controls
| |
DIL switch
Switch | Function | ON/OFF | Description |
|---|---|---|---|
| Positioning signal and range Y | ON | [mA] |
OFF (Factory setting) | [V] | ||
| Positioning range Y and U | ON | 2...10 V, 4...20 mA |
OFF (Factory setting) | 0...10 V, 0...20 mA | ||
| Valve characteristic | ON (Factory setting) | V̇̇lin (linear) |
OFF | V̇log (equal-percentage) |
Positioning signal and range Y
Voltage and current
Positioning range Y and U
Output signal U (position feedback signal) is dependent on the load resistance Ri.
- Ri > 500 Ω, voltage signal
- Ri < 500 Ω, current signal
Valve characteristics selection
Equal percentage or linear
Forced control input Z
Function | Transfer | Connections | Position |
|---|---|---|---|
Z is not connected The valve will follow the Y-signal or phase-cut signal |
|
| No function |
Z connected to G The valve will fully open via control path A to AB |
|
| Fully open |
Z connected to G0 • The valve will close via control path A to AB |
|
| Closed |
Signal priority
- Hand wheel position Man (open) or Off
- Forced control signal Z
- Phase-cut signal
- Signal input Y
Calibration
If the electronics module is replaced or the actuator turned by 180 °, the valve electronics must be recalibrated. For that, the hand wheel must be set to Auto.
The printed circuit board has a slot. Calibration is made by bridging the contacts located behind the slot using a screwdriver. The valve will then travel across the full stroke to store the end positions.
While calibration is in progress, the green LED will flash for about 10 seconds.
Operating state indicators
LED | Indicator | Function | Troubleshoot |
|---|---|---|---|
Green | LIT | Control mode | Normal operation, everything o.k. |
Flashing | Calibration | Wait until calibration is finished (green or red LED will be lit) | |
Manual operation | Hand wheel in Man or Off position | ||
Red | LIT | Calibration error | Recalibrate (bridge contacts behind the calibration slot) |
Internal error | Replace electronics module | ||
Flashing | Mains fault | Check mains network (outside the frequency or voltage range) | |
DC Supply - / + | Connect DC supply + / - correctly | ||
Both | Dark | No power supply | Check mains network, check wiring |
Electronics faulty | Replace electronics module |