Glossary Of Terms - ABB Triguard SC300E Safety Manual

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Glossary of Terms

1oo2 One out of two voting
2oo2 Two out of two voting
2oo3 Two out of three voting
3-2-1 Three to two to one processor degradation
3-2-0 Three to two to zero processor degradation
A,B or C System channel reference
ac alternating current
BSI British Standards Institute
CE Indicates compliance with applicable European Community directives
CI Common Interface (a daughter board fitted to I/O modules).
dc direct current
EMC Electro Magnetic Compatibility
EPROM Erasable Programmable Read Only Memory
ESD Emergency Shutdown
F&G Fire and Gas
FAT Factory Acceptance Test
FPGA Field Programmable Gate Array
GTZ Go To Zero
HR Hot Repair
HW Hardware
id identity
I/O Input and/or Output
IEC International Electrotechnical Commission
ISO International Standards Organisation
LED Light Emitting Diode
LFD Latent Fault Detection
MBB Bus Buffer Interface module
MDR Mandatory Design Review
MPP Main Processor
MTTR Mean Time To Repair
PAC AC Power Supply for a Triguard system
PID Proportional, Integral and Derivative - process control signals
PLC Programmable Logic Controller
PSU Power Supply Unit
PVCS Product Version Control Specification
QA Quality Assurance
QM Quality Management
RAM Random Access Memory
ROM Read Only Memory
RS232C Serial binary data exchange standard
RTTS Real Time Task Supervisor (Main Processors operating system.)
SAT Site Acceptance Test
SIFT Software Implemented Fault Tolerance
SS Standard Specification
SW Software
System One third of a triplicated circuit
channel
THR Hot Repair Adapter Card
TMR Triple Modular Redundancy
TriBuild Software application programming package for SC300E
Issue 5 - September 2006
Page 6 of 65