SIEMENS SQN70.244A20 servo motor

SIEMENS SQN70.244A20 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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