The bus coupler for Profibus-DP (stock no. < 492-9208') 492-9208 is required to form a fully functioning encoder. Multiturn Absolute Encoders. Electronically adjustable, resolution adjustable (stock no. < 492-9191') 492-9191/ only) High resistance to shock and vibration High degree of protection to IP67 Operating voltage:10-32Vdc Operating temperature range: -20 to +85°C