The Vertiv™ MPX™ modular rack PDU consists of various components. The basic element is a busbar, which is responsible for the power and communication distribution to the individual modules. The input power is routed via the MPX Power Entry Module (MPX PEM) to the MPX system. Different output modules (MPX Branch Receptacle Modules, MPX BRM) are available depending on requirements. Four different variants can be set up depending on the component population of the busbars:1. Vertiv MPX Elementary Modular basic power distribution without metering and control function. An upgrade to another equipment model is quick and easy. 2. Vertiv MPX Elementary Phase Monitored Modular power distribution with metering on input. An upgrade to a superordinate line is possible by populating with appropriate output modules. 3. Branch-Monitored Vertiv MPX Modular power distribution with metering on input and each output module. An upgrade or downgrade to another line is possible if installed with appropriate output modules. 4. Receptacle Managed Vertiv MPX Modular power distribution with input, metering, each output module and each output. Individual outputs can also be switched on and off remotely. A downgrade to another line is possible if installed with the appropriate output modules. A combination of the "Elementary Phase Monitored", "Branch-Monitored" and "Receptacle Managed" lines on a shared busbar is also possible and is one of the exceptional features of the MPX. Interfaces for the network communi cation, sensors and/or local display are provided by the Rack PDU Card (RPC) in the MPX PEM. MPXPRC-V1880XXX