Vertiv EXP8DOAO Expansion Card | Pex PartsEXP8DOAO Expansion Card The four expansion slots of the RDU501 main unit support hot swap connection of EXP8COM card, EXP8DIAI card, EXP8DOAO card and EXP2DI6DO card. EXP8COM card (optional). The EXP8DOAO card provides eight digital or analog output ports (digital and analog self adaptive) and supports digital analog output, wherein the digital output is not energized.
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