IFM Electronic G1502S - Terms and Abbreviations

50
Comments
Additional comments concerning the cULus approval
(UL 508):
• Maximum ambient temperature 55°C (in the control
cabinet)
• The safety functions were not assessed by UL� The
approval has been made according to UL 508 for
general applications�
• Use 60/75°C copper conductors only�
• For use in pollution degree 2 environment
• Same polarity (phase) referred to the output
contacts
*) with h
op
= 24 h, d
op
= 365 days, t
cycle
= 3600 s
12 Terms and abbreviations
ESPE Electro-Sensitive Protective Equipment
Cat� Category Category
Classification of the safety-related
parts of a controller as regards their
resistance to failures
CCF Common Cause Failure Common cause failure
DC Diagnostic Coverage Diagnostic coverage
MTTF Mean Time to Failure Mean time to failure
MTTF
d
Mean Time To Dangerous
Failure
Mean time to dangerous failure
OSSD Output Signal Switching Device Output signal switch element,
static safety-related output
PFH
(PFH
D
)
Probability of (dangerous)
Failure per Hour
Probability of a (dangerous) failure per
hour
PL Performance Level PL to EN ISO 13849-1
SIL Safety Integrity Level SIL 1-4 to IEC 61508