AMX120-SR | Belimo | Actuators & Dampers

Damper Actuator, 180 in-lb, Non-Spring Return, 100 to 240V, Modulating




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product specifications

Actuator Series


Agency Listings

cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC and 2006/95/EC

Ambient Temperature Range

-22 to 122 °F (-30 to 50 °C)

Angle of Rotation


Application Type


Electrical Connection

18 GA applicance rated cable with 1/2 in conduit connector protected NEMA 2 (IP54) 3ft 1m 10ft 3m and 16ft 5m

Feedback Output U

2 to 10 VDC, 0.5 mA max


NEMA 2, IP54, UL Enclosure Type 2


5 to 95% RH non condensing (EN 60730-1)

Input Impedance

100 k Ω for 2 to 10 VDC (0.1 mA), 500 Ω for 4 to 20 mA

Manual Override

External Push Button

Position Indication

reflective visual indicator (snap on)

Power Consumption Holding

1 W

Power Consumption Running

4 W

Power Supply

nominal 100 to 240 VAC, 50/60 Hz, tolerance 85 to 265 VAC 50/60 Hz

Quality Standard

ISO 9001

Running Time

95 seconds


maintenance free

Shaft Diameter

1/2 in to 1.05 in round, centers on 1/2 in and 3/4 in with insert, 1.05 in without insert

Storage Temperature Range

-40 to 176 °F (-40 to 80 °C)

Supply Voltage

100-240 VAC


180 in-lb

Transformer Sizing

7.5 VA (class 2 power source)

Unit of Measure


Supply Va

5 VA

Control Signal

2-10 V

product series specifications

    Supply Voltage:
  • 24 VAC ±20% 50/60 Hz, 24 VDC ±10%, 100 VAC, 240 VAC
  • Brushless DC
  • 3' (0.9 m) plenum cable, 18 AWG, terminals
  • Non-spring return
  • 95 degrees, Rev. with switch
    Manual Override:
  • Pushbutton disengage
  • <45 db @ 3' (1m); <35 db @ 3' (1m) (LMB models)
  • 100 steps
    Life Expectancy:
  • 100,000 cycles, 1 million repositions
    Operating Temperature:
  • -22° to 122°F (-30° to 50°C)
    Operating Humidity:
  • 5 to 95% RH
  • , UL94-5VA
  • 5 years

product series features

  • Manual override for testing and verification
  • Reversing switch for control flexibility
  • CSA and CE approved for worldwide application
  • Plenum-rated housing and cable connections
  • NEMA 4 models available for outdoor locations

more information & related documents

Series Description

The Belimo LMB, NMB, AMB, GMB Series direct coupled damper actuators and valve actuators provide damper control and valve control for non-spring return applications in Building Automation Systems, BAS, or HVAC environment. Each actuator comes in two-position, tri-state (floating), proportional, and Multi-Function Technology (MFT) models. All actuators include a manual release mechanism for manual override.

Kele Description

ACT/NSR/180IN-LB(20NM)/ 100-240VAC/ON/OFF