WAGO -I/O-SYSTEM 750 Manual page 144

144 Glossary
S
Safe PLC
A safe PLC (Programmable Logic Controller) is a safety-oriented PLC that
controls safe devices such as F I/O modules.
Safety Function
Function of a machine whose failure can lead to an immediate increase in the
risk(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
F I/O module.
Short Circuit
A practically unopposed conductive connection between two live electrical lines
(see also "Cross Circuit").
Short Circuit Test
The short-circuit test is used to discover a short circuit between two live lines.
See also "Cross Circuit Test".
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.
Single Fault Security
Even after an error occurs, the required safety function is still ensured. In other
words, an error does not lead to the loss of the safety function.
T
TCI (Tool Calling Interface)
TCI (Tool Calling Interface) is an interface specified by the PROFIBUS User
Organization (PNO), which defines how device-specific or manufacturer-specific
parameterization tools are called from a configuration environment. The features
of the interface are described in conformance classes. Generally, the
communication options of the specific software tools are determined with the
devices.
Manual
Version 1.4.2, valid from HW/SW Version 01/02
750-667/000-003 4FDI/4FDO 24V/2A PROFIsafe V2 iPar
WAGO-I/O-SYSTEM 750