SIEMENS SQM50.480A2 servo motor

SIEMENS SQM50.480A2 servo motor

• Reversible electromotoric actuators delivering torques up to 40 Nm
• Running times from 10 to 90 seconds
• With 1 or 2 drive shaft ends; drive shafts are available as separate items and
can be exchanged
• Can be equipped with electronic modules for control and position indication
• Internal and external position indication
• Drive shaft and cam shaft can be separately disengaged
• Choice of UL-listed types for use in the U.S. and Canada
• Supplementary Data Sheets: N7921 and N7922
The SQM5… and this Data Sheet are intended for use by OEMs which integrate
the air damper actuators in their products!

The SQM5… actuators are used to drive gas or air dampers of oil and gas burners of
medium to large capacity.
They are used primarily for load-dependent control of the amounts of gas, oil and com-
bustion air:
• In connection with 3-position or modulating controllers (e.g. 4…20 mA), or
• Directly by burner controls

To avoid injury to persons, damage to property or the environment, the following
warning notes should be observed!
Only qualified staff may open, interfere with or modify the actuators!
• Before performing any wiring changes in the connection area of the actuator, com-
pletely isolate the equipment from the mains supply (all-polar disconnection)
• Ensure protection against electric shock hazard by providing adequate protection
for the connection terminals
• Protection against electric shock hazard is ensured by a hinged plastic cover, al-
lowing safe setting of the cams when mains voltage is present
• Check to ensure that wiring is in an orderly state
• Fall or shock can adversely affect the safety functions. Such actuators may not be
put into operation even if they do not exhibit any damage

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