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https://w3.siemens.com/mcms/programmabl ... -cpus.aspx
For Application which must fulfill high requirements in regards to availability,
in the Q4/2018 the CPU1517H, CPU 1513R-1 PN, CPU 1515R-2 PN will be released.
Both controllers are connected to a PROFINET IO-ring, in order to access the IO-Stations.
Both controllers synchronize each via dedicated synchronization modules.
In case the primary CPU fails the back-up CPU takes over the control.
No data will be lost and the process continues without interruption.
The ring architecture ensures in case of a cable fault that all network participants are still accessible.

The Engineering corresponds to Engineering of a standard CPU.
The synchronization of the programs and data are handled by the TIA-Portal and the redundant controllers, no additional user action required.
High-Available CPUs for larger applications with high requirements in regards to availability


CPU 1517H-3 PN

• CPU with display
• Work memory 2 MB code and 8 MB data
• PROFINET IO-Controller
• Integrated PROFINET I/O interface with 2 ports for
ring structure and 1 PROFINET interface for Ethernet and PROFINET basic services with separate IP address
(in sum 3 ports)
• 2 slots for sync modules
• Integrated system diagnostics
• 4-level security concept
• Width: 210 mm



https://w3.siemens.com/mcms/programmabl ... -cpus.aspx

Redundant CPUs for small to medium applications with higher requirements in regards to availability


CPU 1513R-1 PN

• CPU with display
• Work memory 300 kB code and 1.8 MB data
• PROFINET IO-Controller
• Integrated PROFINET I/O interface with 2 ports for
ring structure
• Integrated system diagnostics
• 4-level security concept
• Width: 35 mm

CPU 1513R-1 PN
Enlarge

CPU 1515R-2 PN

• CPU with display
• Work memory 500 kB code and 3,5 MB data
• PROFINET IO-Controller
• integrated PROFINET IO interface with 2 ports for ring structure and 1 PROFINET interface with separate IP address
(in sum 3 ports)
• Integrated system diagnostics
• 4-level security concept
• Width: 70 mm

Hi, thanks for this description .
Is it possible to use two S7-1517H PLCs without fiber optic ?
I'm currently trying to integrate two S7-1517H but I haven't received yet the fiber optic connectors.
In the meantime, for testing purposes, I'm wondering whether I can still do either of the following :
1- downloading a program to each individual 1517H plc ?
2- establish redundancy with copper ethernet cable ?
3- establish redundancy with only one fiber optic cable ?

1-yes
2- no
3-yes