EC motor 400 V | 3-step fan speed control

The SMT-D-4P-AL is a 3-step control switch designed to optimise the control of EC fan speed, damper actuators, AC fan speed controllers or frequency inverters. The SMT-D-4P-AL offers versatile control, providing three fixed positions that simplify the process of adjusting fan speed. These fixed positions ensure effortless optimisation, allowing you to easily find the ideal speed for your specific ventilation requirements. One of the standout features of this control switch is its adjustable output signals. Positions 1 and 2 offer the flexibility to customise output signals within the 1–10 VDC range, while position 3 consistently delivers the full input voltage, commonly 10 VDC. The SMT-D-4P-AL comes with OFF position. This offers the convenience of shutting down your system when needed, providing complete control over your ventilation environment.. Designed with durability in mind, the splash-proof enclosure of the SMT-D-4P-AL allows for either inset mounting (IP44) or surface mounting (IP54). This ensures that, regardless of your preferred installation method, the device remains robust enough to withstand various environmental factors.