Actuator UC. Impulse group switch for central control for 1 motor or motor relays. Standby loss 0.05–0.4 watt only. This impulse group switch serves to implement commands generated by the sensor relays or by switches and push-buttons and controls a motor, a motor isolating relay MTR12-UC or a DC motor relay DCM12-UC dependent on the setting of the rotary switch on the front. 8 to 230V UC supply voltage and switching voltage at terminals +B1/-A2. The control voltage at terminals A3 up to A8 must have an identical potential. The function of this electronic group impulse switch is based on the principle that, on the one hand, impulse control is used to obtain UP-Stop-DOWN-Stop (contact 1 closed – both contacts open – contact 2 closed – both contacts open) and, on the other hand, additional control inputs can be used to select UP or DOWN as desired. Dynamic refers to control inputs for which one impulse of not less than 20 milliseconds is sufficient to close a contact. Static denotes a control input for which the contact is only closed as long as the control command is applied. UP and DOWN apply to roller shutters, Venetian blinds and roller blinds.