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Actuator LM24A-SR-F TR
RN_img_03psd.png
CAV controller variant RN, with actuator for switching between setpoint values

RN with actuator

img_pro_000445.png
Actuator for switching between setpoint values

EN (Generation 2) with actuator

B70_img_01_2023_07_DE_depsd.png
RN_img_03psd.png
img_pro_000445.png

B70

For motorised setpoint value adjustment on CAV terminal units and flow adjustment dampers, e.g. switching between qvmin and qvmax

Actuators for mechanically automatic CAV terminal units RN and the older EN version (Generation 2)

  • Motorised, variable setpoint value adjustment on the CAV terminal unit
  • 24 V AC/DC supply voltage
  • Control input signal: Voltage signal 2 – 10 V DC
  • Specification of setpoint value range by mechanical stops
  • Positive lock connection with CAV terminal unit
  • Retrofit possible

General Information

Application

  • Variable setpoint adjustment for mechanically automatic CAV control units RN
  • Variable setpoint adjustment for mechanically automatic KVS control units EN in generation 2 (with setpoint adjustment on angular scale)
  • Variable control: Setpoint signal 2 - 10 V DC, corresponds to the total angle of rotation (0 - 95°)
  • Min-max switching (2-point operation) with alternative wiring possible
  • Working range min/max mechanically adjustable


Commissioning

Alternatively:
B72 variable actuator with additional auxiliary switch; separate product data sheet


Parts and characteristics

  • Overload-proof drive LM24A-SR-F TR
  • Release button to allow for manual operation
  • Positive lock connection with the scale adjustment
  • Mechanical stops for setting the volume flow rate setpoints
  • Switch for reversing the direction of the actuator
  • 24 V AC/DC supply voltage
  • Setpoint and position signal 2 - 10 V DC (based on 0 - 95°)


Commissioning

  • Set the mechanical stops according to the minimum and maximum volume flow rates
  • For further information on setting and control, see installation instructions, e.g. CAV control unit RN

Technical information

Functional description, Technical data, Specification text, Order code

  • FUNCTIONAL DESCRIPTION
  • TECHNICAL DATA
  • SPECIFICATION TEXT
  • ORDER CODE
Actuator LM24A-SR-F TR B70_07_gc_2023_DE_desvg.png

1 Positive lock connection for scale adjustment
2 Mechanical stops for rotation stop
3 Direction of rotation switch
4 Gear release
5 Connecting cable

Actuators for CAV control units make it possible to motorise the setpoint adjustment, which would otherwise have to be carried out manually on the setting scale. The actuator B70, B72 moves the scale adjustment variably between a minimum and a maximum position.

The setpoint adjustment on the scale is controlled by a 2 - 10 V DC voltage signal. In the B70/B72 actuator, this voltage signal is mapped to the entire angle of rotation 0 - 95° of the actuator.

The scale range to be used for the setpoint specification must be set during commissioning of the CAV control unit using mechanical stops. This limits the scale range that can actually be used. The value of the setpoint signal must be adjusted to the mechanically selected angle range.

The 2 - 10 V DC output signal of the CAV actuator is merely a position feedback and not an actual volume flow rate value. The output signal is mapped to the entire rotation angle 0 - 95° of the actuator.

Actuators for volume flow controllers type RN and EN (Generation 2)

Order code detailActuatorAuxiliary switch
Part numberTypeSupply voltagePart numberType
B70M466DT6LM24A-SR-F TR24 V AC/DC––

,

Actuator LM24A-SR-F

Supply voltage (AC voltage)24 V AC ± 20%, 50/60 Hz
Supply voltage (DC voltage)24 V DC ± 20 %
Power consumption operation1 W
Power consumption idle position0.4 W
Power rating for cable sizing2 VA
Control signal2 – 10 V DC, Ra > 100 kΩ
Position feedback2 – 10 V DC, 1 mA
Torque5 Nm
Runtime for 90°150 s
Connecting cable

4 × 0.75 mm², approx. 1 m long

IEC protection classIII (Protective extra-low voltage)
Protection levelIP 54
EC conformityEMC according to 2014/30/EU, RoHS according to 2011/65/EU

Operating temperature (depends on the operating range of the control unit)

10 to 50 °C

Weight0.5 kg

Category

  • Constant actuator


Application

  • Variable setpoint specification for constant volume flow controllers


Supply voltage

  • 24 V AC/DC


Interface/signalling

  • 2 – 10 V DC for setpoint position
  • 1-wire control for min/max position
  • 2-wire control for min/max position


Connection

  • Connection cable 4-wire


Interface information

  • Min / Max setpoint position can be set on site with mechanical stops


Factory condition

  • Actuator factory-mounted on CAV controller


NR-VAV–RN-B70
| |
1 2
1 Type
NR-VAV Retrofit kit
2 Variant
RN-B70 modulating actuator 24 V AC/DC for CAV terminal unit RN
EN-B70 modulating actuator 24 V AC/DC for CAV terminal unit EN Generation 2 (setpoint value adjustment with angle scale)


Note:
This is the order code for retrofitting the actuator for a CAV terminal unit.
As a rule, the actuator is specified in the initial order via the order code of the basic device under the section Actuator for setpoint adjustment with the order codes B70.

Variants, VARIANTS

  • VARIANTS
LM2424A-SR-F TR Connecting cable core identification
B70_04_gc_2023_DE_desvg.png

1 ⊥, -: Ground, Zero
2 ~, +: Supply voltage
3 Y: Setpoint value signal
5 U: Position feedback

B70_04_gc_2023_DE_desvg.png
B70_01_gc_2023_DE_desvg.png
B70_03_gc_2023_DE_desvg.png
B70_02_gc_2023_DE_desvg.png
B70_06_gc_2023_DE_desvg.png
B70_05_gc_2023_DE_desvg.png
Platzhalterpng.png

Downloads

product information

  • Prodcut data sheet B70

    B70_PD_2024_04_08_DE_en Prodcut data sheet 400 KB pdf
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