1 NB Overview This section provide specifications of the NB Unit, describes its names and functions of the various parts. 1-1 Models of NB Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-2 Part Names and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-1 NB-series Programmable Terminals Startup Guide Manual(V109)