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193
GMX120-3
On/Off, Floating Point, Non-Spring Return, 100 to 240 VAC
Technical Data
GMX120-3
Power supply
100 to 240 VAC, 50/60 Hz (nominal)
85 to 265 VAC, 50/60 Hz (tolerance)
Power consumption
4 W (2 W)
Transformer sizing
7 VA (Class 2 power source)
Electrical connection
18 GA appliance rated cable
1/2” conduit connector
protected NEMA 2 (IP54)
3 ft [1m] 10 ft [3m] 16 ft [5m]
Overload protection
electronic throughout 0 to 95° rotation
Control
on/off, fl oating point
Input impedance
600
Ω
Angle of rotation
max. 95°, adjustable with mechanical stop
Torque
360 in-lb [40 Nm]
Direction of rotation
reversible with
switch
Position indication
refl ective visual indicator (snap-on)
Manual override
external push button
Running time
150 seconds, constant independent of load
Humidity
5 to 95% RH non condensing (EN 60730-1)
Ambient temperature
-22°F to 122°F [-30°C to 50°C]
Storage temperature
-40°F to 176°F [-40°C to 80°C]
Housing
NEMA 2, IP54, UL enclosure type 2
Housing material
UL94-5VA
Agency listings†
cULus acc. to UL 60730-1A/-2-14,
CAN/CSA E60730-1:02,
CE acc. to 2004/108/EEC and 2006/95/EC
Noise level
<45dB(A)
Servicing
maintenance free
Quality standard
ISO 9001
Weight
3.4 lbs [1.55 kg]
† Rated Impulse Voltage 2.5kV, Type of action 1, Control Pollution Degree 3.
Torque min. 360 in-lb for control of damper surfaces up to 90 sq ft.
Application
For on/off and floating point control of dampers in HVAC systems. Actuator sizing
should be done in accordance with the damper manufacturer’s specifications.
The actuator is mounted directly to a damper shaft up to 1.05” in diameter by means
of its universal clamp. A crank arm and several mounting brackets are available for
applications where the actuator cannot be direct coupled to the damper shaft.
Operation
The actuator is not provided with and does not require any limit switches, but is
electronically protected against overload. The anti-rotation strap supplied with the
actuator will prevent lateral movement.
The GMX series provides 95° of rotation and a visual indicator indicates position of the
actuator. When reaching the damper or actuator end position, the actuator
automatically stops. The gears can be manually disengaged with a button on the
actuator cover.
The GMX120-3 actuators use a sensorless brushless DC motor, which is controlled by
an Application Specific Integrated Circuit (ASIC). The ASIC monitors and controls the
actuator’s rotation and provides a digital rotation sensing (DRS) function to prevent
damage to the actuator in a stall condition. Power consumption is reduced in holding
mode.
Add-on auxiliary switches or feedback potentiometers are easily fastened directly onto
the actuator body for signaling and switching functions.
Dimensions
(Inches [mm])
2.9”
[72.9]
4.55”
[115.6]
7.02” [178.4]
5.37” [136.4]
1.42”
[36]
5.6” [142.4]
2” [50.8]
1/2” to 1.05” [12.7 to 26.67]
2/5” to 1.05” [10 to 26.67]
To center of
mounting slot.
D
12
3
M40024 - 05/10 - Subject to change.
© Belimo
Aircontrols (USA),
Inc.
