About this documentation – Lenze 8400 User Manual
Page 10
About this documentation
Terms and abbreviations used
1
10
EDS84ASC552 EN 9.1
1.3
Terms and abbreviations used
Term
Meaning
Device size
Used as generic term for a group of devices which have the same dimensions
(depth, height and width) but different power ratings.
Standard device
Used as generic term when actions and features are described which are very
similar or the same for different versions or device sizes, e.g.
mechanical installation or
power terminals
Abbreviation
Meaning
Cat.
Category according to EN ISO 13849-1
OSSD
Output Signal Switching Device, tested signal output
PWM
Pulse width modulation
SIL
Safety Integrity Level according to IEC 61508
SU
Safety Unit
OFF state
Signal status of the safety sensors when safety sensors are activated or respond
ON state
Signal status of the safety sensors during normal operation
STO
Safe Torque Off
Former designation: safe standstill