AMX FGN9313 Acts as an external power supply for N-series encoders and decoders. The 12V output from the wall wart is obtained from 120VAC or 240VAC input using a combination of transformers, diodes, and other in-built configurations. The adapter provides a constant voltage supply to the connected electronic devices and promotes heat reduction and electronic noise reduction. The external power adapters use only voltages low enough to be a safety hazard internally for electronic devices.