Siemens SIMATIC ET 200AL System Manual page 168

Glossary
PELV
Protective Extra Low Voltage = grounded protective extra-low voltage
Performance Level
Performance Level (PL) in accordance with ISO 13849-1 or EN ISO 13849-1
Potential group
Group of I/O modules that are jointly supplied with voltage.
Product version (PV) = Function version (FV)
The product version or function version provides information on the hardware version of the
module.
PROFIBUS
PROcess FIeld BUS, process and fieldbus standard that is specified in IEC 61158 Type 3.
Specifies the functional, electrical and mechanical characteristics of a serial bit stream
fieldbus system. PROFIBUS is available with the protocols DP (= Distributed Peripherals),
FMS (= Fieldbus Message Specification), PA (= Process Automation), or TF (= Technological
Functions).
PROFINET
PROcess FIeld NETwork, open Industrial Ethernet standard, which continues PROFIBUS and
Industrial Ethernet. A cross-manufacturer communication, automation and engineering
model, defined as an automation standard by PROFIBUS International e.V.
PROFINET IO controller
Device used to address connected I/O devices (e.g. distributed I/O systems). This means that:
The IO controller exchanges input and output signals with assigned I/O devices. The IO
controller often corresponds with the CPU in which the automation program is running.
PROFINET IO device
Distributed field device that can be assigned to one or more IO controllers (e.g. distributed I/O
system, valve terminals, frequency converters, switches).
PROFINET IO
Communication concept for the realization of modular, distributed applications in the
framework of PROFINET.
PROFIsafe
Safety-oriented PROFINET I/O bus profile for communication between the → safety program
and the → F-I/O module in a → fail-safe system.
168
Distributed I/O system
System Manual, 12/2023, A5E31861578-AL