Siemens Building Technologies SQS Electronic Valve Actuator Data Sheet
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SQS Electronic Valve Actuator
24 Vac, Proportional Control
Spring Return or Non-Spring Return
Powermite
MT Series Globe
Powermite MT Series SQS65U/SQS65.5U
Electronic Valve Actuator.
Description
The Powermite SQS65U and SQS65.5U Electronic Valve
Actuators require a 24 Vac supply and receive a 0 to 10
Vdc or a 0 to 1000 Ohm control signal to proportionally
control a valve. This actuator is designed to work
with Powermite MT Series Valves with a 7/32-inch
(5.5 mm) stroke.
Features
• Maintenance-free with reversible motor
• Voltage or resistance signal input
• Close off up to 160 psi
• Position output signal 0 to 10 Vdc
• Non-Spring Return or Spring Return
• Small, compact design
• Manual adjustment knob with indication of stroke allows
for repositioning in power-off condition
(SQS65U actuator only)
• Mechanical spring allows the valve to return to normal
position in power off condition (SQS65.5U actuator
only)
• Orderable as actuator only or complete valve/actuator
assembly
• Suitable for low pressure (15 psi) steam applications
• Orderable as an actuator only or as a complete
valve/actuator assembly
Applications
For use in small to medium HVAC installations with
Powermite valves with a 7/32-inch (5.5 mm) stroke
requiring a minimum of 90 pounds force (400 N). These
valves can be used in liquid and low pressure steam
service applications.
Recommendation:
Use only with the MT Series valve bodies. This actuator is
not recommended for 2-position or pulse applications.
A-151
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SQS65/65.5 Actuator Specifications
A-152
Operating Voltage
60 Hz ................................................................................. 24 Vac, ±20%
Frequency ....................................................................................... 60 Hz
Power Supply .........................................Earth Ground Isolating, Class 2,
24 Vac Transformer
Do not power more than 10 actuators with one transformer.
Power Consumption
SQS65U ....................................................................................... 4.5 VA
SQS65.5U ....................................................................................... 7 VA
Control Signal (Y)
Voltage ................................................................................. 0 to 10 Vdc
SQS65/65.5 Actuator Product Ordering
Description Part No.
Spring Return SQS65.5U 265
Non-Spring Return SQS65U 264
There are no repair parts for this product.
Replace the entire actuator if inoperative.
Actuator
Prex Code
Dimensions
Control Signal (R)
Resistance.....................................................................0 to 1000 Ohms
Position Output (U)
Voltage ................................................................................. 0 to 10 Vdc
Running Time
at 60 Hz ....................................................................................... 30 sec.
Spring Return (SQS65.5U only) ................................................. 8 sec.
Nominal Stroke .................................................................7/32" (5.5 mm)
Nominal Force ....................................................................90 lbf. (400 N)
Agency Approvals ............................................................ UL/cUL, UL873
CSA C22.2 No. 24-93
Ambient Temperature
Operation.......................................................... 23 to 122°F (-5 to 50°C)
Transport and Storage ..................................-13 to 149°F (-25 to 65°C)
Ambient Humidity .................................... 0 to 90% RH, Non-condensing
Wiring Connection ............ Plenum Cable or Conduit via a 1/2" Knockout
Mounting Location .............................................. NEMA 1 (Interior Only)
Center Line to
Valve Size
Valves
Service height and width are the recommended dimensions to allow access to the product.
in.
SQS65
1/2" (15 mm) 6-5/8" (167 mm) 14-1/2" (370 mm) 5-1/16" (128 mm) 9" (225 mm)
3/4" (20 mm) 6-5/8" (167 mm) 14-1/2" (370 mm) 5-1/16" (128 mm) 9" (225 mm)
1" (25 mm) 6-7/8" (173 mm) 15" (380 mm) 5-1/16" (128 mm) 9" (225 mm)
SQS65.5
1/2" (15 mm) 6-1/16" (153 mm) 14" (355 mm) 5-1/16" (128 mm) 9" (225 mm)
3/4" (20 mm) 6-1/16" (153 mm) 14" (355 mm) 5-1/16" (128 mm) 9" (225 mm)
1" (25 mm) 6-5/16" (159 mm) 14-1/2" (370 mm) 5-1/16" (128 mm) 9" (225 mm)
Top of Actuator
1
H
NO NC
NO NC
Service
Height
H W
Actual Width
of Actuator
1
Service
Width
W
Accessories & Service Kits
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Dimensions shown in inches (mm).
A-257
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