Motor SR Mod W/Aux| Actuator Type | Spring return |
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| Electrical Connection | cable |
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| Direction of Rotation (Fail-Safe) | reversible with CW/CCW mounting |
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| Direction of Rotation (Motor) | reversible with built-in switch |
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| Power Consumption (Holding) | 1 W |
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| Power Consumption (Running) | 2 W |
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| Degree of Protection | NEMA�2, UL�enclosure�type�1 |
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| Shaft Diameter | 1/4" to 1/2" round, centers on 1/2" |
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| Application | For fail-safe, modulating 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 from 1/4? up to 1/2? in
diameter by means of its universal clamp, 1/2? shaft centered at delivery. 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� 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. |
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| Servicing | maintenance free |
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| Power Supply | 24 VAC � 20%, 50/60 Hz, 24 VDC � 10% |
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| Power Consumption Running | 2 W |
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| Power Consumption Holding | 1 W |
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| Transformer Sizing | 4 VA (class 2 power source) |
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| Electrical Connection | (2) 3 ft [1 m], 18 GA appliance cables with
1/2? conduit connectors |
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| Overload Protection | electronic throughout 0� to 95� rotation |
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| Input Impedance | 100 k ? for 2 to 10 VDC (0.1 mA), 500 ? for
4 to 20 mA |
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| Angle of Rotation | max. 95�, adjustable with mechanical stop |
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| Direction of Rotation (Motor) | reversible with built-in switch |
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| Running Time (Motor) | 95 sec constant, independent of load |
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| Ambient Temperature Range | -22�F to +122�F [-30�C to +50�C] |
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| Storage Temperature Range | -40�F to +176�F [-40�C to +80�C] |
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| Housing | NEMA 2, IP42, UL enclosure type 2 |
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| Agency Listings | cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC and 2006/95/EC |
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| Noise Level (Motor) | <35 dB (A) |
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| Operating Range Y | 2 to 10 VDC, 4 to 20 mA w/ ZG-R01 (500 ?, 1/4 W resistor) |
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| Direction of Rotation (Fail-Safe | reversible with CW/CCW mounting |
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| Position Indication | visual indicator, 0� to 95� (0� is full spring
return position) |
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| Running Time (Fail-Safe) | <25 sec @ -4�F to 122�F [-20�C to 50�C], <
60 sec @ -22�F [-30�C] |
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| Noise Level (Fail-Safe) | <62 dB (A) |
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| Feedback Output U | 2 to 10 VDC, 0.5 mA max |
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| Electrical protection | actuators are double insulated |
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| Humidity | max. 95% RH non-condensing |
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| Auxiliary Switch | 1 x SPDT, 3A resistive (0.5A inductive) @ 250
VAC, adjustable 0� to 95� |
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| Shaft Diameter | 1/4? to 1/2? round, centers on 1/2? |
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| Torque | 22 in-lbs [2.5 Nm] minimum |
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| Operation | The TF series actuators provide true spring return operation for reliable fail-safe
application and positive close-off on air tight dampers. The spring return system
provides consistent torque to the damper with, and without, power applied
to the actuator. The TF series provides 95� of rotation and is provided with a
graduated position indicator showing 0 to 95�. The TF uses a brushless DC
motor which is controlled by an Application Specific Integrated Circuit (ASIC)
and a microprocessor. The microprocessor provides the intelligence to the ASIC
to provide a constant rotation rate and to know the actuator?s exact fail-safe
position. The ASIC monitors and controls the brushless DC motor?s rotation and
provides a digital rotation sensing function to prevent damage to the actuator
in a stall condition. The actuator may be stalled anywhere in its normal rotation
without the need of mechanical end switches. Power consumption is reduced
in holding mode. The TF -S versions are provided with one built-in auxiliary
switch. This SPDT switch is provided for safety interfacing or signaling, for
example, for fan start-up. The switching function is adjustable between 0� and
95�. |
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Product Family
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