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2.Basic Instruction
2.1 Terminology
Electro-sensitive protective equipment (ESPE)
Assembly of devices and components working together for protective
tripping or presence-sensing purposes and comprising as a minimum.
Detection Capability
Sensing function parameter limit specied by the supplier that will cause
actuation of the electro-sensitive protective equipment(ESPE).
EDM:
Means by which the electro-sensitive protective equipment(ESPE)
monitors the state of control devices which are external to the ESPE.
Lockout Condition:
Condition, initiated by a fault, preventing normal operation of the electro-
sensitive protective equipment(ESPE). All output signal switching
devices(OSSDs) and, where applicable, all secondary switching
devices(SSDs) are signalled to go to the OFF-state.
Muting:
Temporary automatic suspension of a safety function(s) by safety-
related parts of the control system.
On-state
State in which the output circuit is complete and permits the ow of
current.
Response Time:
Maximum time between the occurrence of the event leading to the
actuation of the sensing device and the output signal switching
devices(OSSD) achieving the OFF-state.
Fault:
State of an item characterized by inability to perform a required function,
excluding the inability during preventive maintenance or other planned
actions, or due to lack of external resources.
Performance Level(PL e):
SLA-3 device comply with EN ISO 13849 PL e requirements,i.e. EN954
cat.4 requirements.
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