SIEMENS SQN70.694A20 servo motor per pcs

SIEMENS SQN70.694A20 servo motor

Reversible electromotoric actuators for air dampers and valves of oil or gas
burners of small to medium capacity.
The SQN7… and this Data Sheet are intended for use by OEMs which integrate
the actuators in their products!

The SQN7… actuators are designed for driving gas or air dampers of oil or gas burners
of small to medium capacity, for load-dependent control of the fuel and combustion air
volume:
– In connection with P-PI or PID controllers, such as the RWF40…
– Directly via the different types of burner controls, such as LFL…, LME…, LMG…,
LMO…, LOA…
– In connection with 1- or 2-wire control or 3-position controllers

• All types of actuators feature:

– Impact-proof and heat-resistant plastic housings
– Screw terminals for the electrical connections
– Maintenance-free gear train, which can be disengaged
– Internal position indication
– Easy-to-adjust end and auxiliary switches for adjusting the switching points
– Integrated electronic circuits

Do not interfere with or modify the actuators!
• All activities (mounting, installation and service work, etc.) must be performed by
qualified staff
• Before making any wiring changes in the connection area, completely isolate the
plant from mains supply (all-polar disconnection). Ensure that the plant cannot be
inadvertently switched on again and that it is indeed dead. If not observed, there is
a risk of electric shock hazard
• Ensure protection against electric shock hazard by providing adequate protection
for the connection terminals and by securing the housing cover
• Each time work has been carried out (mounting, installation, service work, etc.),
check to ensure that wiring is in an orderly state
• Fall or shock can adversely affect the safety functions. Such actuators must not be
put into operation, even if they do not exhibit any damage.

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