Siemens 6ES5927-5KA13 | S5-115U Processor Module for PLC

Central Processing Unit for SIMATIC S5-115U Systems

The 6ES5927-5KA13 processor module serves as the central processing unit for the SIMATIC S5-115U programmable controller series. This CPU module, often recognized as the 927 CPU, controls the execution of user programs and manages all system resources. It utilizes the STEP 5 programming language and supports both relay ladder logic and function block diagrams, making it suitable for medium-scale automation tasks [citation:1][citation:4].

Technical Specifications

Parameter	Specification
Manufacturer	Siemens
Product Line	SIMATIC S5
Model	6ES5927-5KA13
Product Type	Processor Module (CPU)
Compatibility	SIMATIC S5-115U
Memory Configuration	Integrated RAM
Memory Expansion	Submodule (optional)
Programming Language	STEP 5 (STL, LAD, CSF)
Integrated Interfaces	1 x Programming port
I/O Addressing Capacity	Dependent on system configuration
Processor Technology	ASICs

Memory and Program Execution

The 6ES5927-5KA13 features a memory concept that relies on integrated RAM and supports optional submodules for expansion. This setup allows the CPU to handle user programs and system data effectively. The CPU executes the user program cyclically and processes interrupts, ensuring deterministic control responses. The optional submodules are typically used to store firmware upgrades or additional library functions [citation:1][citation:3].

System Integration and Compatibility

This processor module fits directly into the S5-115U central rack (CR 700/701/702) or expansion racks (ER 701/702). Users can attach the 6ES5927-5KA13 to the backplane bus and configure the system using the programming device. The module supports communication with digital and analog I/O modules via the backplane bus, enabling comprehensive control over field devices [citation:2][citation:4].

Physical Characteristics and Installation

The 6ES5927-5KA13 module occupies a single slot in the S5-115U chassis. Its dimensions are consistent with the standard S5 module format of 25 mm width, 287 mm depth, and 245 mm height. The front panel features a programming port and LED status indicators for “Run,” “Stop,” and “Error” states. The unit’s weight is approximately 1.3 kg.

Product Status and Support

Siemens has discontinued this processor as a current production item. However, the 6ES5927-5KA13 remains accessible through authorized distributors. For existing installations, replacement parts may still be available to maintain system uptime.