MTBF of PLC Systems
MTBF of PLC Systems
(OP)
Using supplier published MTBF and the e^(-lambda*T) methods for a PLC rack with CPU/Backplane and I/O the unavailability comes to a staggering 1900 hours a year.. Has someone got any sensible fault tree analysis information for PLCs





RE: MTBF of PLC Systems
TTFN
I can do absolutely anything. I'm an expert!
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: MTBF of PLC Systems
thread238-406328: MTBF of Protection Relays and other things
RE: MTBF of PLC Systems
TTFN
I can do absolutely anything. I'm an expert!
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: MTBF of PLC Systems
CPU 1.0E-05 Exida Safety Equipment Reliability Handbook, 2003, ISBN 0-9727234-0-4
PSU 5.0E-06 Exida Safety Equipment Reliability Handbook, 2003, ISBN 0-9727234-0-4
AI 2.0E-06 Exida Safety Equipment Reliability Handbook, 2003, ISBN 0-9727234-0-4
DI 1.0E-06 Exida Safety Equipment Reliability Handbook, 2003, ISBN 0-9727234-0-4
AO 2.0E-06 Exida Safety Equipment Reliability Handbook, 2003, ISBN 0-9727234-0-4
DO low 1.0E-06 Exida Safety Equipment Reliability Handbook, 2003, ISBN 0-9727234-0-4
DO High 1.0E-06 Exida Safety Equipment Reliability Handbook, 2003, ISBN 0-9727234-0-4
Industrial PLC - Analogue Input (single) 3.6E-06 SINTEF, ISBN 9788214-048490
Industrial PLC - CPU (1oo1) 1.8E-05 SINTEF, ISBN 9788214-048490
Industrial PLC - Digital output (single) 3.6E-06 SINTEF, ISBN 9788214-048490
Programmable safety system - Analogue Input (single) 3.2E-06 SINTEF, ISBN 9788214-048490
Programmable safety system - CPU (1oo1) 9.6E-06 SINTEF, ISBN 9788214-048490
Programmable safety system - Digital output (single) 3.2E-06 SINTEF, ISBN 9788214-048490
Hardwired safety system - Trip amplifier / analogue Input (single) 4.4E-07 SINTEF, ISBN 9788214-048490
Hardwired safety system - Logic (1oo1) 3.3E-07 SINTEF, ISBN 9788214-048490
Hardwired safety system - Digital output (single) 3.3E-07 SINTEF, ISBN 9788214-048490
PLC (DO) - Simplex system 5.0E-06 FARADIP-THREE V6.4