WAGO-I/O-SYSTEM 750
Glossary 157
753-668/000-004 4FAI 0/4-20 mA Diff PROFIsafe
Manual
Version 1.0.0, valid from HW/SW Version 01/01
I
Individual Parameters (iPar)
Individual or device-specific parameters of a safe unit or safe device (see also
“iParameters”).
Input Measured Value
The input measured value corresponds to the current measured by the
F I/O module at an analog input.
Input Pair
An input pair is used for two-channel applications and consists of two inputs.
Either inputs AI1 and AI2 or AI3 and AI4 must be used for an input pair.
iParameter
See “Individual Parameters”.
iPar Server
Standardized mechanism for saving and restoring iParameters (iPar) in the non-
secure part of a control unit.
M
Mini-WSB
The Mini-WSB marking accessories is a quick marking system (item No. 247-xxx)
for WAGO connectors and WAGO modules.
MTTF
D
(Mean Time To Failure Dangerous)
The MTTF
D
value specifies the mean time to a dangerous failure of a safe unit or
sub-unit.
O
Operator Acknowledge (OA)
See “User acknowledgement”.
Overvoltage Category
The overvoltage category is in indicator for the overvoltages occurring, for
example, at the installation location due to lightening or switching operations.