10
GLOSSARy
SIL
The security integrity level is a
measure for quantifying the risk
reduction. Term used in the safety
technology (EN 61508 -1...7).
SS1
Safety function „Safe stop 1“ in ac-
cordance with IEC 61800-5-2
SSI
Synchronous serial interface for
encoder
STO
Safety function „Safe Torque Off“ in
accordance with IEC 61800-5-2
TTL
Incremental signal with an output
voltage up to 5 V
USB
Universal serial bus
VARAN
Real-time Ethernet bus system
