Siemens Building Technologies SQD Series Electronic Valve Actuators Data Sheet

SQD Series Electronic Valve Actuators

Siemens
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Warranty

24 Vac, Floating or 0 to 10 Vdc Control
Non-Spring Return

PICV

SQD Series Electronic Valve Actuator.

Description

Pressure Independent Control Series SQD Electronic

Valve Actuators require a 24 Vac power supply and receive

a oating control signal (SQD85.03U) or a proportional
0 to 10 Vdc signal (SQD65U) to control a valve.

These actuators are designed to work with 1-1/2 inch and
2-inch Pressure Independent Control Series Valves with a

1/4-inch (6.5 mm) stroke and a threaded valve bonnet that
ts the actuator.

Features

• Floating or 0 to 10 Vdc control

• Non-spring return

• Reversible synchronous motor

• Antilocking gear train

• UL listed for plenum installation

• Direct mounting on valves; no adjustments required

• Visual position indication

• Manual override

• Electromotoric actuator, maintenance-free

• Load-dependent switch-off in stroke limit positions
reduces power

Applications

For use in heating and cooling HVAC applications with
Pressure Independent Control valves that require up to

90 lbs. (400N) actuator force.

A-89

Valves

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Product Guard
PLUS 3 Warranty

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SQD Series Electronic Valve Actuator Specifications

A-90

Valves

Operating Voltage ............................................................... 24 Vac ±20%

Frequency ....................................................................................... 60 Hz

Fusing of Supply Lines .................................................... Max. 10A Slow

Power Consumption

SQD65U .......................................................................................4.5 VA

SQD85.03U .....................................................................................2 VA

Signal Inputs

Terminals Y1, Y2 (SQD85.03U) ............................. 3-Position (Floating)

Terminal Y (SQD65U) ................................ 0-10 Vdc, 0.1 mA Maximum

Terminal R (SQD65U) ..................................................0 to 1,000 Ohms

Signal Output

Terminal U (SQD65U) ............................ 0 to 10 Vdc, 0.5 mA Maximum

Operating Data

Run time .............................................................................. 43 Seconds

Positioning force ............................................................ >90 lbs (400 N)

Nominal stroke. .......................................................................... 6.5 mm

Admissible temperature of medium in the valve.............. 34°F to 248°F

Parallel operation of actuators............................................10 Maximum

(1°C to 120°C)

SQD Series Actuator Product Ordering

Actuator

Description Part No.

24 Vac, 3-position, 400N, NSR PICV Actuator SQD85.03U 234

24 Vac, 0 to 10V, 400N, NSR PICV Actuator SQD65U 235

Prex Code

Cable Entries................................. 2 Entries for 1/2" Conduit Connection

Agency Approvals

UL ................................................................................................. UL873

cUL .............................Certied to Canadian Standard C22.2 No. 24-93

Ambient Temperature

Operation.................................................. 23°F to 122°F (-5°C to 50°C)

Transport .............................................. -13°F to 158°F (-25°C to 70°C)

Storage ..................................................... 23°F to 122°F (-5°C to 50°C)

Humidity

Operation............................................................................. 5 to 95% rh

Transport .................................................................................. <95% rh

Storage .............................................................................. 5% to 95% rh

Accessories & Service Kits

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A-257