Belimo TRANE TAF Series, Technical Documentation Manual

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88
I20683 - Subject to change.
TNMB24-3
On/Off-Floating Point Control, Non-Spring Return, Direct Coupled, 24 V
Technical Data TNMB24-3
Power Supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power Consumption 2 W (0.2 W)
Transformer Sizing 4 VA (Class 2 power source)
Electrical Connection 3 ft, 18 GA plenum rated cable
1/2” conduit connector
Overload Protection electronic throughout 0° to 95° rotation
Control on/off, floating point
Input Impedance 600
Ω
Angle of Rotation max. 95°, adjust. with mechanical stop
Torque 90 in-lb [10 Nm]
Direction of Rotation reversible with switch
Position Indication reflective visual Indicator (snap-on)
Manual Override external push button
Running Time 95 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
Housing Material UL94-5VA
Agency Listings cULus acc. to UL 60730-1/-2-14 and
CAN/CSA C22.2 No.24, CE according
to 73 / 23 / EEC
Noise Level <45dB(A)
Servicing maintenance free
Quality Standard ISO 9001
Weight 1.7 lbs [0.75 Kg]
Torque min. 90 in-lb for control of damper
surfaces up to 22 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, 1/2” self-centered
default. A crankarm 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 TNMB 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 TNMB24-3… 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.
For all accessories, see pages 110 and 132.
Dimensions
(All numbers in brackets are in millimeters.)
2.36
”
[60]
3.15
”
[80]
4.88” [124]
3.9” [99]
0.98”
[25]
2.42
”
[61.4]
2” [50.8]
1/2” to 1.05” [13 to 26]
1/2” Centered (Default)
3/8” to 11/16” [10 to 17]
D121
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