The MD1A is a 2…10 V modulating damper actuators. It is designed for operating air control dampers in ventillation and air conditioning systems for building services installations. As an accessory, the modulating actuator have a fully adjustable auxiliary switch unit. The actuator is maintenance free, with mechanical position indication. Supply voltage: 24 Vac/Vdc +/- 20%. Modulating control signal: 2…10 Vdc. Torque: 10 Nm, IP 54 Protection class. Angle of rotation: Max. 95°, adjustable by mechanical stops. Connection cable 1 m, 4 x .75 mm² (AW 18).