Safety Systems
Safety PLCs, interlocks, and protective devices
C
3 terms
Category B/1/2/3/4
Safety circuit architectures per ISO 13849-1 defining redundancy requirements.
CIP Safety
Safety protocol for EtherNet/IP enabling safety and standard data on same network.
Common Cause Failure
Single fault affecting multiple redundant safety channels simultaneously.
D
2 terms
E
2 terms
F
2 terms
G
2 terms
L
2 terms
P
4 terms
Performance Level
PL
ISO 13849-1 safety performance categories from PLa (lowest) to PLe (highest).
PROFIsafe
Safety protocol over PROFINET/PROFIBUS for fail-safe communication.
Proof Test
Periodic test verifying safety function operates correctly when demanded.
Pull Cord Switch
Emergency stop activated by pulling cord along conveyor length.
S
10 terms
Safety Barrier
Intrinsically safe barrier limiting energy to hazardous areas.
Safety Contactor
Positively guided relay contacts for safety circuit switching.
Safety Function
Specific safety measure like Safe Torque Off or Safe Stop implemented in system.
Safety Lifecycle
Phases from concept through decommissioning per IEC 61508.
Safety Mat
Pressure-sensitive mat detecting presence and stopping hazardous motion.
Safety PLC
Specialized PLC certified for safety functions per IEC 61508/62061.
Safety Rated
Component certified for use in safety-critical applications.
Safety Relay
Monitoring relay for safety circuits with redundancy and self-checking.
Safety Scanner
Laser scanner creating configurable protective fields for area guarding.
SIL (Safety Integrity Level)
SIL
IEC 61508 risk reduction measure with levels 1-4 for safety functions.