Potentiometer for controlling EC fans. Output voltage on ST EC 10 and ST EC 230 can be continuously adjusted between 0 - 10 V using a rotary knob. ST EC 3 allows the output voltage to be regulated in 3 levels: Level 1 = 3 - 7 V adjustable, Level 2 = 5 - 9 V adjustable, Level 3 = 10 V. The potentiometer can be installed in a flush-mounted box without a housing (IP 44) or surface-mounted with the housing (IP 54). An additional switching contact on the ST EC 010 enables, for example, the connection of a controller release. ST EC 230 for connection to a power supply of 230 V. ST EC 010 for connection to a power supply of 10 V. ST EC 3 for connection to a power supply of 10 - 15 V. Article: ST EC 230, Voltage type: Alternating current, Rated voltage: 230 V, Output signal: 0 V - 10 V, Protection class: IP 54, Installation type: Surface-mounted / flush-mounted, Housing material: Plastic, Color: pure white, similar to RAL 9010, Weight: 0.17 kg, Weight with packaging: 0.19 kg, Width: 82 mm, Height: 82 mm, Depth: 65 mm, Width with packaging: 107 mm, Height with packaging: 85 mm, Depth with packaging: 73 mm