Copley Controls Accelnet - Abbreviations and Acronyms

Accelnet & Stepnet Plus Panels STO Manual 16-01338 Rev 00
Page 10 of 34 Copley Controls
4.8 Abbreviations 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)
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
STO
Safe Torque Off
Vdc
Volts DC (Direct Current)
Copley Controls Related
BEL
Accelnet Plus Panel EtherCAT 1-Axis
BPL
Accelnet Plus Panel CANopen 1-Axis
BE2
Accelnet Plus Panel EtherCAT 2-Axis
BP2
Accelnet Plus Panel CANopen 2-Axis
TEL
Stepnet Plus Panel EtherCAT 1-Axis
TE2
Stepnet Plus Panel EtherCAT 2-Axis
TP2
Stepnet Plus Panel CANopen 2-Axis
Table 3