Siemens 6ES5391-5AA13 Interface Module Cable

Siemens 6ES5391-5AA13 is an operator panel in the SIMATIC S5 family, specifically the 391 model, delivered as an assembly that includes the housing required for the 390 timer/counter module and forms the front-end of the interface. It functions as the human–machine interface for legacy S5 controllers, providing display and input capabilities that accompany the 390 timer/counter hardware to monitor and control processes in older automation systems. Catalog listings describe the part as an operator panel with housing for the 390 timer/counter module, and Siemens literature positions it within the SIMATIC S5 operator panel lineup rather than as a standalone interface cable. Discontinued by Siemens in 1999, with distributors noting no direct replacement, the 6ES5391-5AA13 is now primarily relevant to service, repair, or restoration of vintage S5 installations, where matching the 390 timer/counter module within the operator panel housing is essential for preserving original behavior.