Do ABB Power Supplies SD831, SD833 and SD834 have surge protection? If so, is there any such document available?
There is a lot of information about the protective features of the above mentioned power supplies in the following users' guide: S800 I/O Getting Started, 3BSE020923-510
E.g. tables 28 through 32 declares the IEC 61000-6-2, Electromagnetic compatibility (EMC) including transients (e.g. surge) and overvoltage.