Accelnet Plus Micro Modules User Guide
16-01687 Rev 03
Copley Controls
Page 6 of 139
A
BBREVIATIONS AND ACRONYMS
Acronym Description
Safety-Related
a,b,c,d,e
Denotation of performance level (PL)
Cat
Category
CCF
Common Cause Failure
DC
Diagnostic Coverage
EMC
Electro Magnetic Compatibility
HFT
Hardware Fault Tolerance
MTTF
Mean Time to Failure
MTTFd
Mean Time to Dangerous Failure
PDS(SR)
Power Drive Systems (Safety Related)
PE
Protective Earth
PELV
Protected Extra Low Voltage (power supply)
PFD
Probability of Dangerous Failure upon Demand
PFH
Probability of Failure per Hour
PL
Performance Level
PWM
Pulse Width Modulation
S, S1, S2
Severity of Injury
SELV
Safety Extra Low Voltage (power supply)
SFF
Safety Failure Fraction
SIL
Safety Integrity Level
SIL CL
Safety Integrity Level Claim Limit, SIL Capability
STO
Safe Torque Off
Vdc
Volts DC (Direct Current)
Copley Controls Related
AEV
Accelnet Plus Micro Module EtherCAT
AEZ
Accelnet Plus Micro Module Et EZ board
APV
Accelnet Plus Micro Module CANopen
APZ
Accelnet Plus Micro Module C EZ board