Failure of Console Power Supply (CPS01) stopped ICT and NIS21
We have console power supply (Model: CPS01, Make: Abb bailey beijing engineering) part#4NIC-Q191 installed for powering up NIS21 and ICT13A (for interface with server station). CPS01 contains two built-in power supplies which do load sharing. Recently, one of our power supplies failed and corresponding NIS21 and ICT13A stopped. As a result, communication was lost with all four servers and clients. We reset both modules (ICT and NIS) successfully. We checked voltage on output of faulty power supply and they were 0. Further, fault LED was on. We replaced the faulty power supply. As per my understanding, after one supply became faulty, second one did not perform the load sharing quick enough and as a result, both modules lost power briefly. Would welcome any support from experts to answer the following: - Are two power supplies of CPS01 (4NIC-Q191) designed for bumpless transfer? - If they are designed for bumpless transfer, why did the NIS21 and ICT13A got stopped?