MRT Backplane

Different backplanes are used for connectivity and signal distribution in MRT, which are divided into two main groups: Main and Lower backplanes.

Main Backplane

The Main Backplane is used for connectivity between modules in the digital section. There are four types of main backplanes available: BPM912, BPM912L, BPM912M, and BPM912R. The Main Backplane provides the connection between I/O cards and the RTU module (which controls the system). Main Backplanes are interconnected via D-Sub 25 connectors, which carry Backplane Bus signals. Power is supplied through dedicated 12V power carriers.

Lower Backplane

The Lower Backplane is used for connectivity between modules and input/output signals. The Lower Backplane has a modular design in this system, is replaceable with a new lower backplane with minimal switching time, and is divided into two types: BPL921S and BPL922S.