Surface protection

The drive unit is optionally available with the following variants of surface protection.

Surface protection	Ambient conditions	Sample applications
Standard	Suitable for machines and systems in buildings and enclosed rooms with neutral atmospheres. Similar to corrosivity categoryAccording to DIN EN ISO 12 944‑2: C1 (negligible)	Machines and systems in the automotive industry Conveyor systems in logistics areas Conveyor systems at airports
OS1	Suited for environments prone to condensation and atmospheres with low humidity or contamination, such as applications outdoors under roof or with protection. Similar to corrosivity categoryAccording to DIN EN ISO 12 944‑2: C2 (low)	Systems in saw mills Hall gates Agitators and mixers
OS 2	Suited for environments with high humidity or moderate atmospheric contamination, such as applications outdoors subject to direct weathering. According to corrosivity categoryAccording to DIN EN ISO 12 944-2: C3 (moderate)	Applications in gravel plants Cable cars
OS 3	Suitable for environments with high moisture and occasional heavy atmospheric and chemical contamination. Occasional wet cleaning with acidic or alkaline media. Including for use in coastal areas with moderate salinity. Similar to corrosivity categoryAccording to DIN EN ISO 12 944‑2: C4 (strong)	Sewage treatment plants Port cranes Mining applications
OS 4	Suitable for environments with permanent humidity and severe atmospheric or chemical contamination. Regular acidic and caustic wet cleaning, also with chemical cleaning agents. According to corrosivity categoryaccording to DIN EN ISO 12944-2 Classification of environments: C5-1 (very high)	Drives in malting plants Wet areas in the beverage industry Conveyor belts in the food industry

Surface protection OS2 to OS4 is not available for devices with a size 2 electronics cover.