800-543-9038
USA
866-805-7089
CANADA
203-791-8396
LATIN AMERICA
197
GMB24-SR-T N4
NEMA 4, Proportional Control, Non-Spring Return, Direct Coupled, 24V, for 2 to 10 VDC and 4 to 20 mA
Technical Data
GMB24-SR-T N4
Power supply
24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption
4.5 W (2.0 W)
Transformer Sizing
6.5 VA (Class 2 power source)
Electrical connection
screw terminal (for 26 to 14 GA wire)
½” conduit connector
Overload protection
electronic throughout 0 to 95° rotation
Operating range Y
2 to 10 VDC, 4 to 20 mA
Input impedance
100 k
Ω
(0.1 mA), 500
Ω
Angle of rotation
max. 95°, adjustable with mechanical stop
Torque
360 in-lb [40 Nm]
Direction of rotation
reversible with
switch
Position indication
dial
Running time
150 seconds
constant independent of load
Humidity
5 to 100% RH (UL Type 4)
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
UL Type 4X, NEMA 4X, IP66
Housing material
polycarbonate
Agency listings†
cULus acc. to UL 60730-1A/-2-14,
CAN/CSA E60730-1, CSA C22.2 No. 24-93,
CE acc. to 89/336/EEC
Noise level
<45dB(A)
Servicing
maintenance free
Quality standard
ISO 9001
Weight
9.8 lbs [4.45 kg]
† Rated Impulse Voltage 800V, 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 proportional modulation of dampers in HVAC systems. Actuator sizing
should be done in accordance with the damper manufacturer’s specifi cations.
The actuator is mounted directly to a damper shaft up to 1.05" in diameter by
means of its universal clamp.
The actuator operates in response to a 2 to 10 VDC, or with the addition of a
500
Ω
resistor, a 4 to 20 mA control input from an electronic controller or
positioner. A 2 to 10 VDC feedback signal is provided for position indication or
master-slave applications.
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 GMB24-SR-T N4 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 after the cover is removed.
The GMB24-SR-T N4 actuator uses a sensorless brushless DC motor, which
is controlled by an Application Specifi c 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])
172 [6.77]
D3
12
M40024 - 05/10 - Subject to change.
© Belimo
Aircontrols (USA),
Inc.
