11
GLOSSARY
PFH Term used in the safety technology
(EN61508-1...7)forthesizeoferror
probability per hour
PLC Programmable logic controller
PT100 TemperaturesensorwithR0=100Ω
PT1000 TemperaturesensorwithR0=1000Ω
PTC PTC-resistor for temperature detec-
tion
PWM Pulse width modulation
RJ45 Modularconnectorwith8lines
SCL Synchronous sensorless closed loop
SELV SafetyExtraLowVoltage(<60V)
SIL The security integrity level is a
measure for quantifying the risk
reduction. Term used in the safety
technology(EN61508-1...7)
SS1 Safety function „Safe stop 1“ in ac-
cordancewithIEC61800-5-2
SSI Synchronous serial interface for
encoder
STO Safetyfunction„SafeTorqueO“in
accordancewithIEC61800-5-2
TTL Incremental signal with an output
voltage up to 5 V
USB Universal serial bus
VARAN Real-time Ethernet bus system