Siemens SIMATIC S7-1500 Manual page 18

Other technology functions
Technology modules also implement functions such as high-speed counting, position
detection, measuring functions and pulse generators (PTO, PWM and frequency output). With
the CPU 1511C-1 PN and CPU 1512C-1 PN compact CPUs, these functions are already
integrated and can be implemented without additional technology modules.
SIWAREX is a versatile and flexible weighing module which you can use as a static scale for
operation.
Redundant CPUs
The CPUs of the S7-1500R/H redundant system offer a high degree of reliability and system
availability. A redundant configuration of the most important automation components
reduces the likelihood of production downtimes and the consequences of component errors.
The higher the risks and costs of a production downtime, the more worthwhile the use of a
redundant system. The avoidance of production downtimes compensates for the generally
higher investment costs.
Security Integrated
In conjunction with STEP 7, each CPU offers password-based know-how protection against
unauthorized reading out or modification of the program blocks.
Copy protection provides reliable protection against unauthorized reproduction of program
blocks. With copy protection, individual blocks on the SIMATIC memory card can be tied to its
serial number so that the block can only be run if the configured memory card is inserted into
the CPU.
In addition, you can assign various access rights to different user groups in the controller
using four different authorization levels.
Improved manipulation protection allows changed or unauthorized transfers of engineering
data to be detected by the controller.
The use of an Ethernet CP (CP 1543-1) provides you with additional access protection
through a firewall or possibilities to establish secure VPN connections.
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.
CPU 1511-1 PN (6ES7511-1AK02-0AB0)
Equipment Manual, 05/2021, A5E40869673-AB
2.2 Area of application of the SIMATIC S7-1500 CPUs
Product overview
17