Advertisement
These Actuators are designed to control a 2- or 3-way
valve in respons to the output from a HVAC controller
or BAC system.
All NEC-440 actuators can be controlled in
modulating or 3-point floating modes.
Features:
• Manual operation mechanical and/or electrical
• Position indication, LED signalization
• Selectable speed 2 or 6 s/mm
• Automatic adaptation of stroke to valve's end
positions (self-adjustment).
• Integrated auxilliary switch
• Characteristics optimization
• Adjustable stroke limitation
• Anti-oscillation function
• Pulse or continuous output signal
• Voltage or current feed-back signal
• External reset button
• Auto detection of control signal
• 3-point or modulating control selection
• Galvanic insulation Y, X and output terminals 4&5
• Thermal and overload protection
• Precise control and fast response in 3-point mode
(0,01 s)
Technical data:
• Power supply: (AC or DC):
24 V, 50 Hz/60 Hz
• Control input: modulating or 3-point
0/2 - 10 Vdc 4 -20 mA
• Force: 440 lbs (2000 N)
• Stroke: 2" (50 mm)
• Speed (selectable): 2 or 6 s/mm
• Max. pipe temperature: 392 °F (200 °C)
Electric Actuators 440 lbs Stem Force
NEC-440 Non-Spring Return
NEC-440FC Spring Return Stem Down
NEC-440FO Spring return Stem Up
Advertisement
Table of Contents
Related Manuals for Danfoss NEC-440
Summary of Contents for Danfoss NEC-440
- Page 1 These Actuators are designed to control a 2- or 3-way valve in respons to the output from a HVAC controller or BAC system. All NEC-440 actuators can be controlled in modulating or 3-point floating modes. Features: • Manual operation mechanical and/or electrical • Position indication, LED signalization...
- Page 2 Actuators Power supply Type NEC-440 NEC-440FC NEC-440FO Actuator type NEC-440 NEC-440FC NEC-440FO Power supply 24 +10 /–15 %; AC or DC 25 (24 V) 40 (24 V) 40 (24 V) Power consumption Transform. 40VA Transform. 75VA Transform. 75VA Frequency 50/60 Modulating 0-10 (2-10) [Ri = 40 kΩ] Control input Modulating 0-20 (4-20) [Ri = 500 Ω] 3-point floating mode ( auto-detection) 0-10 (2-10) [Ri = 10 kΩ]...
-
Page 3: Installation
After self-adjustment they indicate end positions of the stroke. Electrical connection Electrical connections can be accessed by removing the service cover. NEC-440 Four cable entries are provided for M 16×1,5 (5/8”) or M 20×1,5 (3/4”) cable glands. Note that in order to maintain the enclosure rating, appropriate cable connectors must be used. For steam installations always tilt the actuator minimum 45°. - Page 4 GND 0 V Control Gnd. 0(2)-10 V Input 0(4)-20 mA 0(2)-10 V Output (feedback) 0(4)-20 mA NEC-440 connected as 3-point floating Y terminal not used (Applies to all models) CONTROLLER Neutral 24 V AC/DC Power supply SP output 4, 5 SP(AC) -max 4A...
-
Page 5: Led Signalling
The three-color (green/yellow/red) LED function indicators are located on the Constantly lit Positioning mode - Actuator is retracting, stem up actuator cover. They indicate different operating modes. RESET button Constantly lit Positioning mode - Actuator is extending, stem down Actuators NEC-440 all have a RESET button which is located on top cover of Green LED: the actuator next to LED indicators. With Flashing Self adjustment mode - Actuator is retracting, stem up this button you can enter or exit (1 s cycle) -
Page 6: Dip Switch Settings
DIP switch settings The actuator has a selection of DIP switches (Fig. 1) under the service cover. DIP1: FAST/SLOW – Speed selection - FAST; 2 s/mm Fig. 1 - SLOW; 6 s/mm DIP2: DIR/INV – Direct or inverse acting selector (Fig. 2): - INV; the actuator is direct acting to input signal (stem down on increased signal). - DIR; the actuator is inverse (reverse) acting to control signal (stem up on increased signal). DIP3: 2-10 V/0-10 V – Input/output - OFF: 2-10 V; the input signal is in the range from 2-10 V (voltage input) or from 4-20 mA (current input) - ON: 0-10 V the input signal is in the range from 0-10 V (voltage input) or from 0-20 mA (current input) Signal range selector sets Y... - Page 7 DIP switch settings DIP7: Smart function selector: - OFF ; the actuator does not try to detect oscillations in the system. - ON ; the actuator enables special anti-oscillation algorithm: see section on anti-oscillation algorithm. DIP8: Uy/Iy –Input signal selector: - Uy; input signal Y is set to voltage (V) - Iy; input signal Y is set to current (mA) NOTE: Y detection is disabled if DIP8 is set to ON and DIP3 is set to OFF. DIP9: Ux/Ix –Output (feedback) signal selector: - Ux; output signal X is set to voltage (V) - Ix; output signal X is set to current (mA) Anti-oscillation algorithm Valve position X signal (V)
-
Page 8: Manual Operation
Manual operation All NEC-440 actuators can be manually Actuator Mechanical Electrical positioned when in Stand-By mode or when type operation operation there is no power supply (mechanically). NEC-440 NEC-440FC/FO Mechanical manual operation Electrical manual operation Actuators have a knob & crank on the top of the Actuators have two buttons on the top of the... - Page 9 AME 655 AUTO 3,5-4,5 mm × T 10 4 mm 0,7 mm AME 658 SD 1× AME 658 SU 1×...
-
Page 10: Cable Connections
Cable connections AUTO 3,5–4,5 mm × T 10 0,7 mm 5/8” 3/4”...
Need help?
Do you have a question about the NEC-440 and is the answer not in the manual?
Questions and answers