Q337 – TUW890K01 Description Description Q337 – TUW890K01 Separation wall IS and non-IS Separation wall between Intrinsically Safe and non Intrinsically Safe Select I/O Module Termination Units. 10 pieces per package. Related products ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE076939R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE081636R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE066490R1 Read more