Danfoss ABNM-LOG, ABNM-LIN Data sheet

Data Sheet

Actuator Type ABNM-LOG/LIN for AB-QM, 0-10 V Proportional

Application

Function

The ABNM actuator is a thermoelectric actuator for opening and closing valves in the fields of heating, ventilation and air conditioning systems (HVAC).

The actuator mechanism of the ABNM actuator uses a positive temperature coefficient (PTC) resistorheated wax element and a compression spring. The wax element is heated by applying the operating voltage and moves the integrated piston. The force generated by this movement is transferred to the piston, thus opening or closing the valve.

The closing force of the compression spring (100 N actuating force) is matched to the closing force of the valves and keeps the valve closed when de-energized. When the control voltage is applied (0-10 V), the wax element is heated under electronic control. The actuator provides active regulation in a defined range (see characteristic curve between 0.5 V and 10 V).

In the range of 0 – 0.5 V, the actuator remains in a quiescent state in order to ignore ripple voltage occurring in long cables. The relation between control voltage and actuator travel is balanced by optical path measurement, allowing very accurate positioning. When the control voltage is outside of the active range, the valve is kept closed by the closing force of the compression spring.

Control is done by a 0-10 V signal, which is provided either by a room thermostat or, in most cases, by a central direct digital control (DDC) system. The actuator converts the 0-10 V signal into a proportional actuator travel, which can be either linear (ABNM LIN) or logarithmic (ABNM LOG).

Ideal use in heating/cooling systems and in

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combination with central direct digital control (DDC) systems in building management systems (BMS).

ABNM LOG for actuating valves controlling

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the flow of liquid to air heat exchanges, e.g. cooling fan coils or air handling units.

ABNM LIN for actuating valves controlling

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the flow of liquid to liquid heat exchangers.

First open function (for NC only)

In its delivery condition, the ABNM is kept open when de-energized due to the first open function (filling). This enables heating/cooling operation during the carcass construction phase even when the electric wiring is not yet complete. During the later electrical start-up, the first open function is unlocked by applying the operating voltage for more than 6 minutes and the ABNM will then be completely operable.

Automatic calibration

During the electrical start-up the valve closing point is detected. This ensures an optimum match with the specific valve used.

Function display

The function display (all-round display) of the ABNM shows at the first glance whether the valve is “open” or “closed”.

Danfoss Heating Solutions VDSKF202 © Danfoss 10/2011 1

Data Sheet Actuator Type ABNM-LOG/LIN for AB-QM, 0-10 V Proportional

Code Nos. and Technical Data

Accessories

Type Supply voltage Control voltage Valve function

ABNM LOG with VA50 adapter

ABNM LIN with VA50 adapter

ABNM LOG without adapter

ABNM LIN without adapter

* Halogen free Note: For theft protection order 082F1091

Valve adapters

Connection Code no. Danfoss AB-QM VA50 082F1075

Cable (halogen free)

Length Code no. 1 meter 082F1081 5 meter 082F1082 10 meter 082F1083

24 V AC 0-10 V DC

NC (normally

closed)

NC (normally

closed)

NC (normally

closed)

NC (normally

closed)

NC (normally

closed)

Cable* length

1 m 082F1191

5 m 082F1192

1 m 082F1193

no 082F1198

no 082F1199

Code no.

Data

Version Closed when de-energized Voltage 24 VAC 50/60 Hz (-10% to +20%) Max. inrush current <300 mA during approx. 2 min. Operating current 90 mA Operating power 0.4 W Control voltage 0-10 V DC Proportional conversion range of

control voltage Input resistance 100 kΩ (also 10 kΩ factory setting, if ordered) Actuator travel In the range 0.5-10V the actuator proportional controls (LOG or

Average actuation delay 30 s/mm Actuating force 100 N +/- 5% Operating temperature 0 - 60 °C Fluid temperature 0 - 100 °C Storage temperature -25 to 65 °C Ambient temperature 0 to 60 °C Relative humidity max. 80% Degree/class of protection IP54 (only when connected to cable)/Safety extra-Iow voltage CE conformity according to 60730 Housing/housing colour Polyamid/white RAL 9003 Weight 100 g without adapter and cable Connecting cable/cable length

0.5-10 V DC

LIN) a 0-4 mm stroke, starting from the closing point of the valve. The stroke is mechanically limited at 4.5 mm.

3 x 0.22 mm2 PVC, white, halogen free/1 meter, 30 g

Data Sheet Actuator Type ABNM-LOG/LIN for AB-QM, 0-10 V Proportional

Characteristic Curves

ABNM-LOG, transformation curve

Relative stroke

Input signal (volt)

ABNM-LIN, transformation curve

Relative stroke

Input signal (volt)

ABNM actuator

The actuator converts the 0-10 V signal into a proportional actuator travel of 0-4.5 mm.

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