Danfoss AME 438 SU Data sheet

Data sheet

Actuator for modulating control AME 438 SU – safety function (spring up)

Description

AME 438 SU actuator is used with two and threeway valves type VRB, VRG, VF and VL up to DN 50 diameter.

The actuator has some special features:

• it automatically adapts its stroke to the valve end positions which reduces commissioning time (self stroking);

• advanced design incorporates load related ‘switch-o’ to ensure that actuators and valves are not exposed to overload;

• Safety function (spring up): In case of power failure or power switch o spring up function retracks actuator stem to end position; Further manual stem positioning is not disabled.

Main data:

• Nominal voltage:

- 24 VAC, 50 Hz/60 Hz

• Control input signal:

- 0(4)…20 mA

- 0(2) … 10 V

• Force: 450 N

• Stroke: 15 mm

• Speed: 15 s/mm

• Max. medium temperature: 150 °C

• Self stroking

• Output signal

Ordering

Technical data

DH -SMT/S I

Actuator

Typ e Supply voltage Code No.

AME 438 SU 24 VAC 082H 0121

Power supply V 24 AC, ±10%

Power consumption VA 14

Frequency Hz 50/60

Control input Y

Output signal X V 0-10 (2-10) [min. load = 5 kΩ]

Close of force N 450

Max. stroke mm 15

Speed s/mm 15

Max. medium temperature

Ambient temperature 0 … 55

Storage and transport temperature –40 … +70

Protection class III (24 V)

Degree of protection IP 54

Weight kg 2,3

- marking in accordance with

standards

VD.LE.O4.02 © Danfoss 09/2015

V 0-10 (2-10) [Ri = 200 kΩ]

mA 0-20 (4-20) [Ri = 500 Ω]

°C

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

Accessories

Typ e Code No.

Stem heater (for valves DN 15-50) 065Z0315

150

Data sheet Actuator for modulating control AME 438 SU

Installation

Wiring

Mechanical

Use 4 mm Allan key (not part of actuator delivery) 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 than 0 °C or at 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 xture. Once the actuator is placed, retighten the xture.

Electrical

Electrical connections can be accessed by removing the actuator cover. Two cable gland entries with thread (M20 x 1.5 and M16 x 1.5) are prepared for cable glands.

Note: Cable and cable gland used must not compromise the actuator’s IP rating, and must ensure the connectors are fully strain relieved. Please observe local rules and regulations as well.

24 V AC

Wiring for modulating control (SW 6 in position OFF - factory set)

SP 24 VAC .........................................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)

Wiring for 3-point control (SW 6 in position ON)

Wiring length

0-50 m 0.75 mm

> 50 m 1.5 mm

Recommended crosssectional area of the wiring

Disposal

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

VD.LE.O4.02 © Danfoss 09/2015

DH -SMT/S I

Data sheet Actuator for modulating control AME 438 SU

Commissioning

DIP switch setting

Complete the mechanical and electrical installation, set 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 rst time or

- afterwards by changing of DIP switch 9 setting (from OFF to ON and back to OFF)

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.

DIP switches

• SW 1: U/I - Input signal type selector

- OFF position; voltage input is selected

- ON position; current input is selected

• SW 2: 0/2 - Input signal range selector

- OFF position; the input signal is in the range from 2-10 V (voltage input) or from 4-20 mA (current input)

- ON position; the input signal is in the range from 0-10 V (voltage input) or from 0-20 mA (current input)

• SW 3: D/I - Direct or inverse acting mode selector

- OFF position; the actuator is in direct acting

mode (stem extracts as voltage increases)

- ON position; the actuator is in inverse acting

mode (stem retracts as voltage increases)

• SW 4: —/Seq - Input signal range in sequential mode

- OFF position; the actuator works in

complete input range 0(2)-10 V or 0(4)-20 mA

- ON position; the actuator works in

sequential range; 0(2)-5(6) V (or 0(4)-10(12) mA) or 5(6)-10 V (or (10(12)-20 mA))

• SW 5: 0-5V/5-10V - Normal or sequential mode selector

- OFF position; the actuator works in

sequential range 0(2)-5(6) V or 0(4)-10(12) mA

- ON position; the actuator works in

sequential range 5(6)-10 V or 10(12)-20 mA

SW 3

• SW 6: Prop./3-pnt - Modulating or 3-point mode selector

- OFF position; the actuator works according

to control signal

- ON position; the actuator works as 3-point

actuator

• SW 7: LOG/LIN - Equal percentage or linear

ow through valve selector

- OFF position; the ow through valve is equal

percentage according to control signal

- ON position; the ow through valve is linear

according to control signal

• SW 8: 100% KVS/Reduced KVS - Flow

reduction through valve selector

- OFF position; the ow through valve is not

reduced

- ON position; the ow through valve is

reduced by half of increment standard KVS values (example: valve with KVS 16 and SW8

set to ON – maximum ow through the valve is K

13 (middle between standard KVS 16 and

VS

KVS10)

• SW 9: Reset

Change of DIP switch setting (from OFF to ON

and back to OFF) starts self stroking mode

NOTE: To be used only i n combination with valves with e qual

percentage characteristic.

DH -SMT/S I

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