Siemens SIMATIC S7-1500 Manual page 24

Safety Integrated
The fail-safe CPUs are intended for users who want to implement demanding standard and
fail-safe applications both centrally and decentrally.
These fail-safe CPUs allow the processing of standard and safety programs on a single CPU.
This allows fail-safe data to be evaluated in the standard user program. The integration also
provides the system advantages and the extensive functionality of SIMATIC for fail-safe
applications.
The fail-safe CPUs are certified for use in safety mode up to:
• Safety class (Safety Integrity Level) SIL 3 according to IEC 61508:2010
• Performance Level (PL) e and Category 4 according to ISO 13849-1:2015 or
EN ISO 13849-1:2015
Additional password protection for F-configuration and F-program is set up for IT security.
Design and handling
All CPUs of the SIMATIC S7-1500 product series feature a display with plain text information.
The display provides the user with information on the order numbers, firmware version, and
serial number of all connected modules. In addition, the IP address of the CPU and other
network settings can be adapted locally without a programming device. Errors messages are
immediately shown on the display in plain text. When performing servicing, you can
minimize plant downtimes by quickly accessing the diagnostics messages. Detailed
information about this and a multitude of other display functions is available in the SIMATIC
S7-1500 Display Simulator
(https://support.industry.siemens.com/cs/ww/en/view/109761758).
Uniform front connectors for all modules and integrated potential jumpers for flexible
formation of potential groups simplify storage. Additional components such as circuit
breakers, relays, etc., can be installed quickly and easily because a DIN rail is implemented in
the rail of the SIMATIC S7-1500. The CPUs of the SIMATIC S7-1500 product series can be
expanded centrally and in a modular fashion with signal modules. Space-saving expansion
enables flexible adaptation to each application.
The system cabling for digital signal modules enables fast and clear connection to sensors
and actuators from the field (fully modular connection consisting of front connector
modules, connection cables and I/O modules), as well as easy wiring inside the control
cabinet (flexible connection consisting of front connectors with assembled single
conductors).
CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Equipment Manual, 07/2021, A5E40882737-AB
Product overview
2.2 Applications of the S7-1500 CPUs
23