Siemens SIMATIC IPC677E - Page 153

List of abbreviations
D.1 Abbreviations
SIMATIC IPC677E
Operating Instructions, 04/2019, A5E45117996-AA
153
Abbreviation
Term
Meaning
RAID
Redundant Array of Independent Disks
Redundant hard disk array
RAM
Random Access Memory
RI
Ring Input
Incoming call
ROM Read-Only Memory
RS 485 Reconciliation Sublayer 485 Bi-directional bus system designed for up to 32
nodes
SATA
Serial Advanced Technology Attachment
SELV
Safety Extra Low Voltage
Safety extra low voltage
SMART Self Monitoring Analysis and Reporting
Technology
Hard disk error diagnostics program
SNMP
Simple Network Management Protocol
Network protocol
SSD
Solid State Drive
SW
Software
TxD
Transmit Data
Data transfer signal
UL Underwriters Laboratories Inc. US organization for tests and certifications ac-
cording to own or binational standards (with CSA
/ Canada) standards.
USB
Universal Serial Bus
VCC
Positive supply voltage of integrated circuits
VDE Verein deutscher Elektrotechniker (Union
of German Electrical Engineers)
VGA
Video Graphics Array
Video adapter which meets industrial standard
VT-D Virtualization Technology for Directed I/O Enables the direct assignment of a device (e.g.
network adapter) to a virtual device.
WD Watchdog Program monitoring with error detection and
alarming.