757-662 and 753-667 Profisafe eight-channel modules integrate safety-related sensors into Sinumerik-840D Power line and Solution line. Via Profibus, 757-662 module (eight inputs) and 753-677 (four inputs/four outputs) support safety applications up to Cat. 4 PLe and SIL 3, as well as perform CNC control via Profibus couplers.