Does anyone know if the electronics for the Flex I/O modules are internally powered from the backplane or do you have to power up the terminal block base? I have some 1794-OW8, 1794-IB16 and 1794-OB16 connected to a 1794-ASB with 24VDC on the ASB that I want to configure and setup with the PLC but without powering up the I/O's until they finish wiring all the field signals first.