The Trilogy Evo device, stand, cart, and mounting hardware are not included. Confirm whether fixings/screws are included against your packaging.
About this part
A ventilator that moves with the patient needs to be mounted securely — not just set on a surface. The mounting plate is the piece that makes that possible: it fixes to the base of the Trilogy Evo and gives a standardized interface that compatible stands, carts, and mounts attach to. Without the correct plate, the device can't be locked onto the mounting hardware safely.