158 Glossary
WAGO-I/O-SYSTEM 750
750-666/000-003 4FDI/2FDO 24V/10A PROFIsafe V2 iPar
Manual
Version 1.2.0, valid from HW/SW Version 01/01
Proof test
Proof test or recurring test that is performed to discover failures in a safety-related
system, so that the system can be brought to a "like-new state" or as close as
possible to this state from a practical perspective.
Proof test interval
The proof test interval is the time until testing the safety function / safety device is
required.
Q
Cross circuit
A practically unopposed conductive connection between two live electrical lines.
See also "Short circuit".
Cross circuit test
The cross-circuit test is used to discover a short circuit between two live lines.
See also "Short circuit test".
Acknowledgement
See "User acknowledgement (Operator Acknowledge (OA))".
S
Sensor
A sensor is used to capture physical units (e.g., switch setting, temperature,
pressure, etc.) and can be connected (if compatible) to the digital inputs of the
PROFIsafe I/O module.
Safety function
Function of a machine whose failure can lead to an immediate increase in the
risk(s).
Safe PLC
A safe PLC (Programmable Logic Controller) is a safety-oriented PLC that
controls safe devices such as PROFIsafe I/O modules.
SIL (Safety Integrity Level)
The Safety Integrity Level (SIL) is used to assess
electrical/electronic/programmable electronic (E/E/PE) systems in terms of
reliability of safety functions. There are four levels for specifying the requirement
for the safety integrity of safety functions where "Safety Integrity Level 4" is the
highest level of safety integrity and "Safety Integrity Level 1" is the lowest.
PLC
A PLC (Programmable Logic Controller) is a device used to control a machine or
system and is programmed on a digital basis.
