The phrase "a central unit" is correct and usable in written English.
It can be used to refer to a primary or main component within a system or organization.
Example: "In our new organizational structure, a central unit will oversee all departmental activities to ensure better coordination."
Alternatives: "a main component" or "a primary unit".
In centralized schemes like [6, 7], the algorithm is executed by a central unit (like the radio base station) that is aware of the channel conditions and the demands of all mobile terminals.
Police forces say they want a central unit to deal with e-crime.
"There was a central unit working directly to the chief constable, peddling a story that was untrue, and fabricating evidence.
The house has under-floor heating as well as a central unit; there is air-conditioning on both floors.
Dating from the nineteenth century, the coast-guard barracks were built symmetrically, their beachward and landward arms meeting in a central unit of somewhat different proportion.
Tom Kraeutler, a co-host of the syndicated radio program "The Money Pit," offers a relatively simple test for a central unit.
For decades, technology companies and futurist magazines have teased us with visions of houses in which the lighting, temperature, TV and audio system could be controlled from a central unit.
Beer was thought to be so important in many bygone civilizations that the Code of Urukagina, often cited as the first legal code, even prescribed it as a central unit of payment and penance.
It lets smart "end-devices", such as PCs, do the work of plucking the data out of the ether, rather than relying on a central unit to control the way those data are routed.
During the course of transmission, the factual narrative elements that surrounded each saying or event were stripped away, leaving only a central unit, which was applied to various situations by the addition of new introductions and conclusions.
RCL is a central unit operation of underground coal gasification (UCG) technology.
