SF24A-SZ-S2 Spring-return actuator, modulating, AC/DC 24 V, 20 Nm, with 2 integrated auxiliary switches Modulating spring-return actuator with emergency control function for adjusting dampers in technical building installations • Air damper size up to approx. 4 m² • Nominal torque 20 Nm • Nominal voltage AC/DC 24 V • Control modulating DC (0)0.5…10 V • Position feedback DC 0.5…10 V • with 2 integrated auxiliary switches อ่านเพิ่ม