Check these links
http://publib.boulder.ibm.com/infocenter/eserver/v1r2/topic/diricinfo/fqx0_bk_web_access.pdf
http://publib.boulder.ibm.com/infocenter/director/v5r2/index.jsp?topic=/diricinfo_5.20/fqm0_t_viewing_model_numbers_serial_numbers_fru_numbers.html
To collect FRU numbers of Power supplier you need Remote supervisor Adapter in your system.
http://publib.boulder.ibm.com/infocenter/eserver/v1r2/topic/diricinfo/fqx0_bk_web_access.pdf
http://publib.boulder.ibm.com/infocenter/director/v5r2/index.jsp?topic=/diricinfo_5.20/fqm0_t_viewing_model_numbers_serial_numbers_fru_numbers.html
To collect FRU numbers of Power supplier you need Remote supervisor Adapter in your system.