Gewiss – GW90857 – KNX 4‑Channel Shutter/Blind Actuator, 6 A, DIN‑Rail

The Gewiss GW90857 is a 4‑channel actuator for roller shutters, curtains, awnings, and Venetian blinds within KNX building automation systems. Mounted on DIN rail (4 modules wide), it delivers 8 interlocked relay outputs (2 per channel) rated up to 6 A motor and 8 A resistive load, and supports local and bus control with LED indicators and front push-buttons. It remains operational locally even without KNX voltage, using auxiliary 230 VAC power to maintain manual control.  

 Key Specifications

• Model / P/N: GW90857

• Type: KNX Shutter Actuator, 4 channels (8 NO outputs), mechanically interlocked

• Load Ratings: Motors: 6 A (EN60669‑2‑1); Resistive: 8 A @ 250 VAC  

• KNX Bus Power: 29 V DC SELV, max 10 mA  

• Auxiliary Power: 230 VAC for local operation when KNX bus is down  

• Indicators & Controls: 8 green LEDs (UP/DOWN status), 8 front push-buttons, local override without bus  

• Mounting & Size: DIN‑rail, 4 modules wide, IP20, operating −5…+40 °C, humidity ≤93% non-condensing  

• Certifications: Compliant with EN50428, EN50090‑2‑2, EN60669‑2‑1; CE, KNX certified