GMB24-SR Belimo Actuator

The Belimo GMB24-SR damper actuator 24V 266inlb 2-10V

Datasheet

Installation Guide

Application

For proportional modulation 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. 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 actuator 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 actuators use a 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.

For low ambient temperatures, the optional supplemental (-H) Heater add-on is available

Specifications

Actuator Type	Non fail-safe
Angle of Rotation	95
Control Type	DC 2…10 V
Degree of Protection	IP54, NEMA 2, UL Enclosure Type 2
Electrical Connection	cable
Manual Override	External push button
Power Consumption (Holding)	2 W
Power Consumption (Running)	5 W
Running Time (Motor)	150 s, constant, independent of load
Safety Function	NO
Shaft Diameter	1/2…1.05″ round, centers on 1/2″ and 3/4″ with insert, 1.05″ without insert
Torque	360 in-lb [40 Nm]
Voltage AC/DC	AC/DC 24 V