Abstract: A fluid-actuated rotary drive with a housing in the form of a tubular body, which has a piston space extending in an axial direction of the housing, in which is movably guided a drive piston assembly for driving a rotatably mounted output shaft, wherein the housing has at one axial end an end face, which is open towards the piston space, with at least one mounting section suitable for the attachment of a housing cover, and with a function module assembly which includes an electronic assembly for monitoring, control and/or regulation of the rotary drive and/or a control valve assembly for actuation of the rotary drive, wherein the function module assembly is placed on the end face and secured by means of at least one mounting section.