N 545D31 KNX Solar Protection Actuator 4xDC 24V 6A Polarity Reversing DIN Rail 5WG1545-1DB31

The N 545D31 KNX solar protection actuator is a four-channel DC 24 V drive controller for sunblinds, shutters, awnings, and ventilation flaps in low-voltage building automation.

• Each channel is rated for 6 A and uses two relays per output for polarity switching of the DC motor
• The unit detects limit switches and automatically determines travel time through current sensing, eliminating manual calibration
• Two status LEDs per channel indicate travel direction and override status
• Direct operation buttons allow manual up/down control, stopping, and slat adjustment
• Maintenance-free terminals support conductors from 0.5 to 2.5 mm, with dedicated terminals for motor connection and DC 24 V supply distribution
• Electronics are bus-powered, and local logic keeps the device operating even when bus communication is interrupted
• Communication objects cover position, slat angle, override, and travel direction
• Functions include scene control, alarm response, forced position, and configurable startup after bus voltage recovery

• DC motorized blinds
• Low-voltage facade shading
• HVAC damper control