UC actuator Surge group switch for central control for 1 motor or for motor relays. Standby loss only 0.05 to 0.4 watts. This surge group switch changes the commands of the sensor relays or of switches and buttons and switches a motor, motor isolating relay MTR12-UC or DC motor relay depending on the setting of the rotary switches on the front. The control voltage at terminals A3 to A8 must have the same potential as the supply voltage. The operating principle of this surge group switch is that, on the one hand, pulse on, stop, stop (contact 1 closed - both contacts open - contact 2 closed - both contacts open) can be controlled, on the other hand, it can be selectively selected up or down via additional control inputs. Dynamic refers to control inputs in which a pulse of at least 20ms is sufficient to close a contact. Static is a control input where the contact is only closed as long as the control command is active. The designations up and down apply to roller shutters, blinds and bl