Siemens 6ES7518-3UT10-0AB0 SIMATIC S7-1500TF CPU 1518TF-3 PN 18MB/150MB Programmable Logic Controller

The Siemens 6ES7518-3UT10-0AB0 is a SIMATIC S7-1500TF CPU 1518TF-3 PN with 18 MB of program memory and 150 MB of data memory, combining standard SIMATIC control with integrated fail-safe and motion technology functions. It provides two PROFINET IRT interfaces with 2-port switches plus a third PROFINET port for basic services, and processes bit operations in 0.3 ns typical. A SIMATIC Memory Card is required to operate the CPU.

Technical Specifications

Selection Notes

The TF designation combines Technology functions (integrated motion control via technology objects) with Fail-safe (F) safety functions in one CPU, so it runs standard PLC logic, closed-loop motion, and safety shutdown without a separate motion or safety controller. The third PROFINET port (X3, basic services) keeps an engineering or diagnostics connection off the two IRT ports (X1/X2) that carry isochronous drive traffic, avoiding jitter on the motion network. With 18 MB program memory and 150 MB data memory, it fits machines with a larger technology-object and recipe count than a lower-memory CPU in the same family; motion-only or safety-only applications without both needs can use a plain T or F variant instead.

Applications

Machine control where synchronized multi-axis motion and fail-safe shutdown run on the same backplane, such as packaging or converting lines with integrated safety zones and PROFINET IRT drive networks.