WAGO -I/O-SYSTEM 750 Series Manual page 129

WAGO-I/O-SYSTEM 750
753-661/000-003 4FDI 24V PROFIsafe V2 iPar
FE (functional earth)
The FE functional earth is not the same as protective earth (PE) according to
VDE 0100 and is only used as an EMC ground connector.
Function Block
Software block executed in a unit that fulfills a sub-function
H
Hardware Fault Tolerance
Capacity of a safety-oriented unit, subsystem or subsystem element to continue
executing a required safety function even when an error exists
Hazardous Situation
Circumstance in which a person is exposed to at least one hazard. This situation
leads to injury directly or over a period of time.
I
Individual Parameters (iPar)
Individual or device-specific parameters of a safe unit or safe device.
iPar Server
Standardized mechanism for saving and restoring individual parameters (iPar) in
the non-secure part of a control unit.
M
Miniature WSB
The miniature WSB marking accessories is a quick marking system
(item No. 247-xxx) for WAGO connectors and I/O modules.
MTTF
D
The MTTF
sub-unit.
O
Operator Acknowledge (OA)
See "User acknowledgement (Operator Acknowledge (OA))"
Output monitoring
The PROFIsafe I/O module checks the voltage on the output signal line against an
expected value.
Overvoltage Category
The overvoltage category is in indicator for the overvoltages, for example, that
can occur at the place if installation due to lightening or switching operations.
Manual
Version 1.4.0, valid from HW/SW Version 01/02
(Mean Time To Failure Dangerous)
value specifies the mean time to a dangerous failure of a safe unit or
D
Glossary 129