HP RM2-7374-000CN Memory PC Board Assembly is a memory printed circuit-board assembly listed for the internal components of the HP M452 printer. It is a service part identified by its exact HP part number.
The parts table specifies one assembly. The manual explains that a PCA can consist of a circuit board alone or a board with additional parts, such as cables or sensors. This description identifies the component and its documented role in the printer parts list; it does not assign an unlisted memory capacity or other specification.