Type Modulating actuators

For variable volume flows in air conditioning systems

Actuators for mechanical self-powered CAV controllers Type EN, RN, or VFC, and for flow adjustment dampers Type VFR

  • Setpoint value adjustment
  • Supply voltage 24 V AC/DC
  • Control input signal: Voltage signal 0 – 10 V DC or 2 – 10 V DC
  • Potentiometer or mechanical stops
  • Positive lock connection with CAV controller or flow adjustment damper
  • Retrofit possible

Stellantrieb 224C-024-02 00135586_0


  • Application
  • Description

Application

  • Actuators for variable adjustment
  • Variable adjustment of volume flow setpoint values of mechanical self-powered CAV controllers Type EN, RN or VFC
  • Setting of various damper blade positions of flow adjustment dampers Type VFR

Parts and characteristics

  • Potentiometer or mechanical stops for setting the volume flow rate setpoints
  • Supply voltage 24 V AC/DC
  • Overload protection
  • Setpoint value signal 0 – 10 V DC or 2 – 10 V DC

Technical information

Function, Technical data, Produktbeziehungen

  • Function
  • Technical data

Functional description

The actuator moves the damper blade mechanism to any position between minimum and maximum.

Minimum and maximum positions can be set on potentiometers.

The control input signal is a voltage signal. The output signal indicates the damper blade position rather than the volume flow rate actual value since the CAV controller does not perform any measurements.

Control options and effect of actuator action in case of factory setting

Order code detail Function Control Direction of rotation
Order code detail Function Control 1 2

B70, B72

Variable

Variable control



B70, B72

Min/Max

1-wire control, 2-wire control

Vmin

Vmax

E03

Variable

Variable control




Actuators LM24A-SR and LM24A-SR-F

Supply voltage (AC)

24 V AC ± 20 %, 50/60 Hz

Supply voltage (DC)

24 V DC ± 20 %

Power rating (AC)

2 VA

Power rating (DC)

1 W

Torque

5 Nm

Running time for 90°

150 s

Position feedback

2 – 10 V DC, 1 mA

Control signal

2 – 10 V DC, Ra > 100 kΩ

Connecting cable

4 × 0.75 mm², 1 m long

IEC protection class

III (protective extra-low voltage)

Protection level

IP 54

EC conformity

EMC to 2014/30/EU, RoHS to 2011/65/EU

Operating temperature

–30 to 50 °C

Weight

0.5 kg


Auxiliary switch S2A

Type of contact

2 changeover contacts1)

Max. switching voltage (AC)

250 V AC

Max. switching current (AC)

3 A (resistive load); 0.5 A (inductive load)

Max. switching voltage (DC)

110 V DC

Max. switching current (DC)

0.5 A (resistive load); 0.2 A (inductive load)

Connecting cable

6 × 0.75 mm², 1 m long

IEC protection class

II (protective insulation)

Protection level

IP 54

EC conformity

EMC to 2014/30/EU, low voltage to 2014/35/EU, RoHS to 2011/65/EU

Operating temperature

–30 to 50 °C

Weight

0.250 kg

1) If both auxiliary switches are used the switching voltages must be the same


Actuator 224C-024-02-003

Supply voltage (AC)

24 V AC ± 20 %, 50/60 Hz

Supply voltage (DC)

24 V DC ±20 %

Power rating (AC)

 3 VA

Power rating (DC)

 2 W

Torque

5 Nm

Running time for 90°

20 – 60 s

Control signal

0 – 10 V DC, Ra > 100 kΩ

Connecting cable

3 × 0.75 mm², 1 m long

IEC protection class

III (protective extra-low voltage)

Protection level

IP 42

EC conformity

EMC according to 2014/30/EU, RoHS to 2011/65/EU

Operating temperature

–30 to 50 °C

Weight

0.5 kg


Variants

  • Variants

Any attachments are to be defined with the order code of the CAV controller.

B7*

Application

  • Actuator LM24A-SR for the variable adjustment of volume flow setpoint values of mechanical self-powered volume flow controllers Type RN or EN (only up to a height of 300 mm)

Variants

  • B72: with auxiliary switch for capturing the end positions

Parts and characteristics

  • Supply voltage 24 V AC/DC
  • Control input signal: Setpoint value signal 2 – 10 V DC, corresponds to the total rotation range (90°), working range is limited by mechanical stops
  • Output: Position feedback 2 – 10 V
  • Mechanical stops for setting the volume flow rates
  • Switch for setting the direction of rotation
  • Positive lock connection with damper blade shaft
  • Release button to allow for manual operation

Commissioning

  • Set the mechanical stops according to the minimum and maximum volume flow rates
  • Change the direction of rotation if necessary, using the switch

B*2

Application

  • Auxiliary switch S2A for capturing damper blade end positions (end positions reached through actuator operation)
  • Volt-free contacts for signalling or activating switch functions
  • Two integral switches, e.g. for damper blade OPEN and damper blade CLOSED
  • Potentiometer for setting any switch point

E03

Application

  • Actuator 224C-024-02-003 for variable adjustment
  • Variable adjustment of volume flow setpoint values of mechanical self-powered CAV controllers Type VFC
  • Setting of various damper blade positions of flow adjustment dampers Type VFR

Parts and characteristics

  • Supply voltage 24 V AC/DC
  • Control input signal: Setpoint value signal 2 – 10 V DC, corresponds to the working range (set on potentiometers)
  • Output: Position feedback 0 – 10 V
  • Potentiometer for setting the volume flow rate setpoints
  • Positive lock connection with damper blade shaft
  • Functional test button: Motor drives first to minimum position, then to maximum position, then returns to the set position
  • Indicator light: Actuator has reached setpoint, actuator in motion, actuator blocked

Commissioning

  • Use the potentiometer to set the minimum or maximum volume flow rate

Actuators for volume flow controllers Type RN or EN

Order code detail Actuator Auxiliary switch
Order code detail Part number Type Supply voltage Part number Type

B70

M466DT6

LM24A-SR-F

24 V AC/DC

 


B72

M466DT6

LM24A-SR-F

24 V AC/DC

M536AI3

S2A


Actuators for volume flow controllers Type VFC and for flow adjustment dampers Type VFR

Order code detail Part number Type Setpoint setting Supply voltage

E03

M466EP7

224C-024-02-003

Potentiometer

24 V AC/DC


Electrical connection

  • Electrical connection

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