Built-in communication port for extension backplanes
Slot spaces are not occupied by Power / CPU / RTU modules
A CPU module and other modules are installed on a main backplane which provides the function of connecting buses. The main backplanes are divided into four types according to the number of I/O modules installed on the main backplanes. These four types are four-slot main backplanes, six-slot main backplanes, eight-slot main backplanes, and twelve-slot main backplanes. Besides, a CPU module installed on a main backplane can be replaced by a RTU module on a control network. Main Backplane with 12 Slots,supports CPU,Remote I/O comm.modules
