Bailey Infi 90 IMHSS02, Instruction

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INTRODUCTION
GLOSSARY OF TERMS AND ABBREVIATIONS (continued)
I-E96-315B 1 - 5
GLOSSARY OF TERMS AND ABBREVIATIONS
(continued)
® Network 90 is a registered trademark of the Bailey Controls Company.
Term Definition
Function Code An algorithm which manipulates specific functions. These functions are
linked together to form the control strategy.
Hydraulic Actuator A cylinder that converts hydraulic power into mechanical work (opening or
closing a valve).
LVDT Linear Variable Differential Transformer. A transformer that provides actua-
tor position feedback by inducing a differential voltage proportional to the
core position (hydraulic actuator position), when driven by an excitation volt-
age.
MCU Microcontroller. A self-contained microprocessor with on-board memory, I/O
ports and support circuitry.
MFC Multi-Function Controller Module. A multiple loop controller with data acqui-
sition and information processing capabilities.
MFP Multi-Function Processor Module. A multiple loop controller with data acqui-
sition and information processing capabilities.
Module Bus Peer-to-peer communication link used to transfer information between intelli-
gent modules within a process control unit.
MMU Module Mounting Unit. A card cage that provides electrical and communica-
tion support for INFI 90/Network 90
®
modules.
OIS Operator Interface Station. Integrated operator console with data acquisition
and reporting capabilities. It provides a digital access into the process for
flexible control and monitoring.
Servo Valve,
Hydraulic A valve, driven by a calibrated electrical signal, that loads or unloads hydrau-
lic fluid to one side of a double acting hydraulic actuator.
Slave Expander
Bus Parallel communication bus between the master and slave modules.
TMU Termination Mounting Unit. A card cage that provides housing for termina-
tion modules and cables.
TM Termination Module. Provides input/output connection between plant equip-
ment and the INFI 90/Network 90 modules.
TU Termination Unit. Provides input/output connection between plant equip-
ment and the INFI 90/Network 90 modules.