Siemens SQM5 Series Technical Instructions

SQM5...
Reversing Actuators
ISO 9001
REGISTERED FIRM
Description
Features
®
SQM5... reversing actuators are used for the positioning of flow control valves, butterfly
valves, dampers, or any application requiring rotary motion. The SQM5... actuators
accommodate control input signals of 4-20 mA, 0-135 Ω, 0-10 Vdc, 0-20 mA, position
proportional and floating control. The available output signals include 4-20 mA,
0-135 Ω, 0-10 Vdc, 0-20 mA, and 0-1000 Ω. SQM5... actuators are available with up to
eight internal, easily accessible and adjustable auxiliary switches.
A selection of exchangeable circuit boards provide a variety of functions including
auto/manual selector switch, manual forward/reverse toggle switch, zero and span
adjustment, parallel or master/slave operation, split range control, input signal override,
and selectable electronic linearization.
The SQM5... is engineered for precision. It is particularly well suited to applications
requiring a high degree of modulating accuracy and repeatability. Drive shaft play is
limited to 0.3° with a modulating accuracy of 250 repositions through 90° of travel.
The SQM5... actuator may be mounted in any position. A selection of mounting
brackets and shafts provide installation flexibility and allow for the simple replacement of
most competitive actuators.
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Modulating accuracy of 250 repositions through 90°
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Two limit switches, plus up to six internal auxiliary switches
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Full closed "economy position" switch
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Drive shaft and cam drum disengagement clutches
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Auto/manual switch, manual control forward/reverse toggle switch
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UL, CSA and CE approved 24, 110 and 220 Vac versions
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Field reversible clockwise (cw) or counterclockwise (ccw) operation
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Various torque ratings and running times available
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Selection of field exchangeable one and two ended shafts
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Mounting brackets to replace competitive actuators
Technical Instructions
Document No. 155-517P25
Rev. 1, July, 2000
Siemens Building Technologies, Inc.