Master Terminal Unit (MTU)

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Abbreviations / Acronyms / Synonyms:

Control Server

NIST SP 800-106, NIST SP 800-82r3

MTU

NIST SP 800-82r3

Definitions:

A controller that also acts as a server that hosts the control software that communicates with lower-level control devices, such as remote terminal units (RTUs) and programmable logic controllers (PLCs), over an OT network. In a SCADA system, this is often called a SCADA server, MTU, or supervisory controller.
Sources:
NIST SP 800-82r3 under Control Server

Glossary Comments

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See NISTIR 7298 Rev. 3 for additional details.