SiemensCPU 928 Central Processor Module, 46 KB RAM, 64 KB EPROM, SIMATIC S5-135U and S5-155U

Product Description

What this part is

Siemens SIMATIC S5 CPU 928 central processor module. Brand: Siemens. Part Number: 6ES5928-3UA12. Module Type: CPU 928 central controller module. RAM: 46 KB. EPROM: 64 KB. Board Marking: GWK-X30, C79040-A442-C14-06-85. Controller Platform: SIMATIC S5-135U and S5-155U. Unit Quantity: 1 Pc. Country of Origin: Germany. The module is the processor that runs the user program in an S5-135U or S5-155U rack.

Decoding the order code

6ES5 — the Siemens order-number group for SIMATIC S5 automation hardware.

928 — the CPU type number, the high-performance processor in the S5-135U and S5-155U range.

C79040-A442-C14-06-85 — the internal Siemens board number printed on the assembly.

What these specs mean in practice

RAM: 46 KB. EPROM: 64 KB. Controller Platform: SIMATIC S5-135U and S5-155U. The 928 was the fast processor in the S5 mid and upper range, which is why it turns up in machines with heavy interlock logic and long programs. Working memory of 46 KB sets how large a user program the CPU will hold in RAM; the 64 KB EPROM socket takes the program submodule for a fixed installation, so a machine can start from EPROM rather than from a loaded RAM image.

Mounting data

Mounting Type: plug-in module for a SIMATIC S5-135U or S5-155U central controller rack slot. Connector Style: backplane connector to the rack, with programmer and memory submodule access at the front panel.

Quantity and configuration

Unit Quantity: 1 Pc. Module only. Condition: new takeout, tested.

Interchange guidance

Manufacturer Status: discontinued. Searchable forms of the number: 6ES5928-3UA12, 6ES5 928-3UA12, 6ES5928 3UA12 and 6ES59283UA12. The related 6ES5928-3UB12 is the CPU 928B, a different processor execution in the same 928 range.