The "N-EM" are a series of emulators that provide the students the required hardware to emulate the most common automatic systems.
The "N-EM" modules are designed to work with the "AE-PLC" units to obtain the fundamental knowledge of PLC programing, PLC management, etc.
"N-EM-CB" represets the automatic control of four pumps that fills a tank. The different switches and pushbuttons emulate the level of the tank, the filling speed of the tank selected, etc. It is possible to regulate the discharge rate with the output valve of the tank.