Technical data sheet
NF24A-MOD
www.belimo.com
NF24A-MOD • en-us • 2022-03-15 • Subject to change
1 / 7
Communicative rotary actuator fail-safe for
adjusting dampers in technical building
installations
• Air damper size up to approx. 2 m²
• Torque motor 90 in-lb [10 Nm]
• Nominal voltage AC/DC 24 V
• Control modulating, communicative, Hybrid
• Conversion of sensor signals
• Communication via BACnet MS/TP, Modbus
RTU, Belimo-MP-Bus or conventional control
Technical data
Electrical data Nominal voltage
AC/DC 24 V
Nominal voltage frequency
50/60 Hz
Nominal voltage range
AC 19.2...28.8 V / DC 21.6...28.8 V
Power consumption in operation
7 W
Power consumption in rest position
3.5 W
Power consumption for wire sizing
9.5 VA
Connection supply / control
cable 3 ft. [1 m], 6 x 0.75 mm²
Data bus communication Communicative control
BACnet MS/TP
Modbus RTU (default setting)
MP-Bus
Number of nodes
BACnet / Modbus see interface description
MP-Bus max. 8
Functional data Torque motor
90 in-lb [10 Nm]
Torque Fail-Safe
10 Nm
Operating range Y
2...10 V
Operating range Y variable
0.5...10 V
Position feedback U
2...10 V
Position feedback U note
Max. 1 mA
Position feedback U variable
Start point 0.5...8 V
End point 2...10 V
Position accuracy
±5%
Direction of motion motor
selectable with switch L/R
Direction of motion fail-safe
selectable by mounting L/R
Manual override
by means of hand crank and locking switch
Angle of rotation
Max. 95°
Angle of rotation note
adjustable starting at 33% in 2.5% steps (with
mechanical end stop)
Running Time (Motor)
150 s / 90°
Running time motor variable
40...150 s
Running time fail-safe
<20 s @ -4...122°F [-20...50°C], <60 s @ -22°F
[-30°C]
Adaptation Setting Range
manual
Adaptation Setting Range Variable
No action
Adaptation when switched on
Adaptation after using the hand crank
Override control, controllable via bus
communication
MAX (maximum position) = 100%
MIN (minimum position) = 0%
ZS (intermediate position) = 50%
Override control variable
MAX = (MIN + 32%)...100%
MIN = 0%...(MAX – 32%)
ZS = MIN...MAX
