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Actuator for modulating control AME 435 | Dew Point

Actuator for modulating control AME 435

Actuator for modulating control
AME 435

Actuator for modulating control AME 435

Description

AME 435 actuator is used with two and three-way valves type VRB, VRG, VF and VL up to DN 80 diameter.

The actuator has some special features:

  • It automatically adapts its stroke to the valve end positions which reduces commissioning time (self stroking)
  • Valve flow adjustment feature; flow can be variably-adjusted from linear to logarithmic or opposite.
  • The advanced design incorporates load related ‘switch-off’ to ensure that actuators and valves are not exposed to overload
  • Combinations with other valves could be seen under Accessories.

Main data:

  • Nominal Voltage:
    – 24 VAC/DC, 50 Hz/60 Hz
  • Control Input Signal:
    – 0(4)-20 mA
    – 0(2)-10 V
  • Force:400N
  • Stroke:20mm
  • Speed(selectable):
    – 7.5 s/mm
    – 15 s/mm
  • Max.medium temperature:130°C
  • Self stroking
  • LED signalling
  • External RESET button
  • Output signal
  • Manual Operation

Ordering

Technical

Power supply: 24 VAC/DC; ±10%
Power consumption: 4.5 VA
Frequency: 50 Hz/60 Hz
Control input Y: 0-10 V (2-10 V) Ri = 95 kΩ
                             0-20 mA (4-20 mA) Ri = 500 Ω
Output signal X: 0-10V (2-10V) RL = 650 Ω (maximal load)
Close of force: 400 N
Max. stroke: 20 mm
Speed: 7.5 s/mm or 15 s/mm
Max. medium temperature: 130°C
Ambient temperature: 0 …55°C
Storage and transport temperature: –40 …+70°C
Protection class: II
Degree of protection: IP 54
Weight: 0.45 kg
CE- marking in accordance with
standards: Low Voltage Directive (LVD) 2006/95/EC: EN 60730-1, EN 60730-2-14 EMC Directive 2004/108/EC: EN 61000-6-2, EN 61000-6-3

Installation

Mechanical
No tool is required to mount actuator on the valve. Installation of the valve with the actuator is allowed in horizontal position or upwards. Installation downwards is not allowed.

The actuator must not be installed in an explosive atmosphere, at ambient temperature lower than0 °Core Ambient temperature higher than 55 C. It must not be subject to steam jets, water jets or dripping liquid as well.

Note:
The actuator may be rotated up to 360° with respect to the valve stem by loosening the retaining fixture. Once the actuator is placed, retighten the fixture.

Electrical
Electrical connections can be accessed by removing the actuator cover. Two cable gland entries without thread (Ø16 and combined Ø16/ Ø20) are prepared for cable glands. From factory one entry is provided by rubber cable gland and the other entry is prepared for opening.

Note:
Cable and cable gland used must not compromise the actuator’s IP rating, and must ensure the connectors are fully strain relieved. Rubber cable gland delivered from factory does not compromise IP rating but it does not provide fully strain relieve according to LVD directive. Please observe local rules and regulations as well.

Jumper/DIP switch setting

Jumper
U/I – Input signal type selector
– U position; voltage input is selected
– I position; current input is selected

DIP switches
SW 1: Not used

SW 2: Input signal range selector
– OFF position; the input signal is in the range from 0-10 V (voltage input) or from 0-20 mA (current input)
– ON position; the input signal is in the range from 2-10 V (voltage input) or from 4-20 mA  (current input)

SW 3: Direct or Inverse acting selector
– OFF position; the actuator is in direct acting mode (stem extracts as voltage increases)
-ON position;the actuator is inverse active mode (stem retracts as voltage increases)

SW 4: Fast/Slow – Speed selector
– OFF position; the actuating speed is 7.5 s/mm
– ON position; the actuating speed is 15 s/mm

SW 5: Not used

SW 6: Not used

SW 7: LIN/MDF – Linear or equal-percentage flow through valve selector
– OFF position; the valve position is linear acc. to the control signal
– ON position; the valve position is equal-  percentage acc. to the control signal. This relation is adjustable – see Equal-percentage valve-flow adjustment section

SW 8: Smart function selector
– OFF position; the actuator does not try to detect oscillations in the system
– ON position; actuator enables special anti oscillations algorithm – see Anti oscillations algorithm section

Equal-percentage valve-flow adjustment
(SW 7 in position ON)
The actuator has a special valve-flow adjustment feature. Flow can be, by turning
the potentiometer clockwise (CW) or counter clockwise (CCW), variably-adjusted from linear to logarithmic or opposite. For details see
Instructions.

Anti oscillations algorithm
(SW 8 in position ON)
The actuator has special anti oscillations algorithm. In case control signal Y on certain point oscillate (Fig. 2) – looking from time perspective, algorithm starts to lower the amplification of the output to the valve. Instead of having static characteristics actuator changes to dynamic characteristics (Fig. 1) – certain output stroke area changes to new slope (decrease amplification).

After control signal does not oscillate anymore output to the valve slowly returns back to static characteristics.

Commissioning
Complete the mechanical and electrical installation, set jumper and DIP-switches, then perform the necessary checks and tests:

  • Apply power
    Note that the actuator will now perform automatic self stroking function
  • Apply The Appropriate Control Signal And check:
    – if the valve stem direction is correct for the application and
    – the actuator drives the valve over the entire stroke length

The unit is now fully commissioned

Automatic self stroking feature
The actuator automatically adapts its stroke to
the valve end positions :
– when power is applied for the first time or
– afterwards by pressing the STAND BY/RESET
button for 5 seconds

Testing entire valve stroke length
The actuator can be driven to the fully-open or closed positions (depending on valve type) by connecting SN to terminals 1 or 3.

Led signalling/ Actuator operating modes

LED function indicator
The bi-colour (green/red) LED function indicator is located on the actuator cover. It indicates the operating modes.

External button
Actuator has external STAND BY/RESET button which is located next to LED indicator. By pressing on this button in different ways different operating modes are initiated:

  • Self stroking mode
    Pressing the STAND BY/RESET button for 5 sec. causes the actuator to start self stroking procedure:
    The bi-colour LED flashes green at 1 sec. intervals during calibration procedure, which begins by extracting the stem. When the maximum force is detected (at the end valve position), the actuator then retracts the stem, until the maximum force is once again detected (on the other valve end position). The actuator will then enter to normal mode and respond to the control signal.
  • Positioning mode
    The bi-colour LED is green and stays on during positioning of the actuator according to the control signal
  • Normal mode
    When the positioning of the actuator is finished the LED flashes green every 6 seconds.
  • STAND BY mode
    Pressing the STAND BY/RESET button switches
    the actuator to STAND BY mode. The actuator keeps its last position in this mode and does not react to any control signal. This mode can be used for manual operation during the commissioning of other equipment, or for
    service purposes.
    The bi-colour LED flashes red at 2 sec. intervals.
    After pressing the STAND BY/RESET button again actuator switches to normal mode.

Manual override
Manual override is done by means of control knob on actuator housing:

  • Disconnect power supply or press STAND BY/ RESET button
  • Adjust valve position using the control knob (observe the rotation direction)

After manual override is not needed:

  • Restore power supply or press STAND BY/ RESET button again

Remark:
When the manual override has been used, the output signal (X) is not correct until the actuator reaches its end position.

Wiring

SP 24 VAC/DC………….. Power supply
SN 0 V………….. Common
Y 0-10 V…………… Input signal
  (2-10 V)
  0-20 mA
  (4-20 mA)
X 0-10 V……………Output Signal
   (2-10 V)
1, 3 Override Input Signal
       (can not be used for 3-point control)

Disposal
The actuator must be dismantled and the elements sorted into various material groups before disposal.

Actuator – valve combinations

Dimensions

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