Contact expansion, inputs: 1/2-channel wiring with/without detection of shorts across contacts, outputs: 8 N/O, 1 N/C, UB = 24 VAC/DC, width: 90 mm, plug-in spring-loaded terminals, contact block for contact expansionin connection with safety-related control components. This product has been discontinued. The following products are fully compatible in function: 750109 751109 However, it should be checked for the respective application whether all necessary framework conditions and parameters are also fulfilled for the intended use.