This paper presents a methodology to implement large Neural Networks based classifiers in low-cost FPGAs. The idea is to divide the large Neural Network into several smaller networks which can easily be implemented in small devices. Then, a Multiple Classifier Ensemble is used to joint the results of each small network and thus provide the output of the system. To validate the proposal a classification experiment of terrain images of satellite has been developed and implemented. Obtained results related the size, velocity and performance of the implemented system confirm the viability of the methodology.