Rockwell Automation T8094 8000 Series TMR System Safety Manual - Manual (Page 9)

SAFETY MANUAL
D oc N umber T8094
I ssue 27 – June 2013
Page i x
ABBREVIATIONS
1-oo-2 One-out-of-two
1-oo-2D One-out-of-two with diagnostics
2-oo-2 Two-out-of-two
2-oo-3 Two-out-of-three
API Application Program Interface
DIN Deutsche Industrie-Norm (German Industrial Standard)
DIU Diagnostic Interface Utility
EMC Electromagnetic Compatibility
EMI Electromagnetic Interference
EUC Equipment Under Control
FB Function Block
FCR Fault Containment Region
HIFT Hardware Implemented Fault Tolerance
IL Instruction List
I/O Input/Output
IMB Inter-module Bus
LD Ladder Diagram
MMU Memory Management Unit
MTR Mean Time to Repair
PC Personal Computer
PST Process Safety Times
PSU Power Supply Unit
SFC Sequential Function Chart
SFOC Second Fault Occurrence Time
SIL Safety Integrity Levels
ST Structured Text
TMR Triple Modular Redundant
TÜV Technischer Überwachungs-Verein
UPS Uninterruptable Power Supply