List of abbreviations
SIMATIC IPC477D, IPC477D PRO
276 Operating Instructions, 11/2016, A5E31347228-AF
NAMUR Normenarbeitsgemeinschaft for Mess- und
Regelungstechnik in der chemischen In-
dustrie (standardization body for instru-
mentation and control technology in the
NCQ Native Command Queuing Automatic re-sorting of the file and disk access,
for increased performance
NEMA National Electrical Manufacturers Associa-
Syndicate of manufacturers of electrical compo-
Interrupt the processor can not reject
NTFS New Techniques File System Secure file system for Windows versions (2000,
NVRAM Non Volatile Random Access Memory Non-volatile data memory. Data memory is re-
tained without external power supply.
Standardized interface for industrial processes
Peripheral Component Interconnect
PCIe Peripheral Component Interconnect ex-
press
High-speed serial, differential full-duplex PtP
interface with high data rate.
PCMCIA Personal Computer Memory Card Interna-
PI Protective Earth Protective conductor
Programmable Interrupt Controller
Programmable interrupt controller
PIC-E Peripheral Component Interconnect Ex-
PXE Preboot Execution Environment Software for running new PCs without hard disk
Redundant Array of Independent Disks
Redundant hard disk array
RAL Restricted Access Location
Installation of device in operating facilities with
restricted access - for example, a locked switch-
RS 485 Reconciliation Sublayer 485 Bi-directional bus system designed for up to 32
Reliable Transfer Service
RxD Receive Data Data transfer signal
Serial Advanced Technology Attachment
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