Siemens 6ES7518-4JP00-0AB0 is a SIMATIC S7-1500H CPU 1518HF-4 PN central processing unit used as one half of a fail-safe redundant controller pair. Two CPUs divide the primary and backup roles, while the active primary executes process control and the backup remains synchronized for a role change.
Across Siemens 6ES7518-4JP00-0AB0, X4 and X5 accept plug-in synchronization modules that carry the two direct fiber-optic redundancy paths. The X1 two-port PROFINET interface connects the redundant controller pair to the PROFINET network or ring, while X2 and X3 provide separate Ethernet paths for higher-level communication.
Inside Siemens 6ES7518-4JP00-0AB0, 9 MB of program work memory and 60 MB of data work memory operate with the required SIMATIC Memory Card. The front display, operating-state LEDs and port LEDs expose CPU, network and diagnostic information without combining those signals with the fail-safe user program.
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