SIMATIC Rack PC 840 V2
Operating Instructions, Edition 05/2006, A5E00248055-04
19-1
Abbreviations
19
Abbreviation Term Meaning
AC Alternating current Alternating current
ACPI Advanced Configuration and Power
Interface
PLC Automation device
AGP Accelerated Graphics Port High speed bus system
APIC Advanced Programmable Interrupt
Controller
Extended programmable interrupt controler
APM Advanced Power Management Tool for monitoring and reducing power
consumption of the PC
PLC Automation system
AT Advanced Technology
ATA Advanced Technology Attachment
ATX AT-Bus-Extended
AWG American Wire Gauge US standard for the cable diameter
BIOS Basic Input Output System Basic Input Output System
CAN Controller Area Network
CD-ROM Compact Disc – Read Only Memory Removable storage medium for large data
volumes
CD-RW Compact Disc – Rewritable Rewritable CD
CE Communauté Européenne (CE symbol) The product is in conformance with all applicable
EC directives
CF Compact Flash
CGA Color Graphics Adapter Standard monitor interface
CLK Clock pulse Clock signal for controllers
CMOS Complementary Metal Oxide
Semiconductors
Complementary metal oxide semiconductors
COA Certificate of authentication Microsoft Windows Product Key
CoL Certificate of License License authorization
COM Communications Port Term for the serial interface
CP Communication Processor Communication computer
CPU Central Processing Unit CPU
CSA Canadian Standards Association Canadian organisation for tests and certifications
according to own or binational standards (with UL
/ USA) standards
CTS Clear To Send Clear to send
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