Abstract: Examination equipment of design and installation of low voltage power distribution combined with digital latch with data strobe technology takes Siemens S7-200 series PLC as control center. The examination equipment is made up of distribution platforms, LED matrix display and tributary load controller. Design of small construction low voltage distribution project, equipment selection, and installation and commissioning work can be done in the examination equipment. Floor plan can be shown in the operating platform, and tributary load can be controlled.