Why must I supply power to the AS-BADU-211 analog input module prior to powering the CPU?



If left unpowered, the AS-BADU-211 will try to pull power from the 5 volt supply on the CPU. As a result of this the BADU-211 will give a false ready and active indication. Although the module is providing correct indications the analog input signals will not be read correctly. Always power up this module prior to the CPU.