Shutter actuator, 4-gang AC 230 V with manual actuation for KNX DRA plus Features: Shutter actuator with manual actuation and status display for each output. With integrated bus coupler. For controlling electrically operated shutters for mains voltage of AC 230 V (4-channel). Connection of various external conductors. Independent control of the four shutter outputs. Shutter position can be directly controlled. Behaviour after bus voltage failure and recovery can be set. Feedback of position. Active or passive (object can be read out) cyclical feedback functions. Assignments of up to five different safety functions (three wind alarms, one rain alarm, one frost alarm) or optionally with cyclical monitoring. Building site operation: Outputs can be operated manually without bus voltage with operating voltage only. Notes : VDE approval in accordance with EN 60669-1, EN 60669-2-1. Installation on DIN top-hat rail.