384 KB processor module for S5-115U programmable controllers
Siemens 6ES5945-7UA23 is the SIMATIC S5 CPU 945 processor for the S5-115U programmable controller, supplied with 384 KB memory. Siemens documentation describes CPU 945 as the highest-performance CPU in the S5-115U range, with an expanded STEP 5 instruction set, floating-point arithmetic, 32-bit accumulators, larger address areas and support for additional block types. It is intended for maintenance of installed S5 control systems. Before replacement, buyers should verify the complete order code, memory submodule, interface module, STEP 5 project, rack configuration and machine backup.
| Product Condition | Original new |
| Availability | In stock |
| Warranty | With 1 year warranty |
| Shipping | Worldwide shipping options available |
Condition, availability and warranty are Stockoems commercial information, not manufacturer commitments.
| Manufacturer | Siemens |
| Complete Part Number | 6ES5945-7UA23 |
| Product Type | Programmable controller CPU module |
| Product Family | SIMATIC S5 |
| CPU Designation | CPU 945 |
| Compatible System | S5-115U |
| Memory Capacity | 384 KB |
| Programming Environment | STEP 5 |
| Processor Functions | Floating-point arithmetic and 32-bit accumulators |
| Architecture Features | Expanded instruction set, address area and block types |
| System Fit | Installed SIMATIC S5-115U systems designed around the CPU 945 architecture. |
| Typical Use | Maintenance of legacy machine control, process sequencing and production automation programs. |
| Maintenance Role | Preserves an established S5 project when the exact CPU, memory and interfaces are matched. |
| Configuration Check | Confirm rack, memory submodule, second-interface hardware and STEP 5 software backup. |
Siemens product data identifies 6ES5945-7UA23 as a spare part for the SIMATIC S5 CPU 945 but does not display an explicit lifecycle label in the reviewed documentation. This page therefore makes no Active, Obsolete or Discontinued claim.
It identifies the SIMATIC S5 CPU 945 for S5-115U with 384 KB memory.
Siemens documentation specifies STEP 5 and describes an expanded instruction set for this processor.
Do not assume full interchangeability; Siemens documents adaptation cases involving timing loops and absolute address access.
Check the rack, memory submodule, interface module, connected I/O and power supply.
No lifecycle conclusion is stated because the reviewed Siemens documentation does not display an explicit status for this exact order code.
Yes. Request full-product, front-panel, label, memory and packaging photographs for the exact unit offered.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Practical checks for industrial automation spare procurement, documentation and shipment preparation.
Our team can compare the complete order code, visible connectors, housing condition and label details before dispatch.
Share the installed product label and system information so compatibility questions can be reviewed before shipment.
| 1. Requirement | Provide the complete part number, quantity, destination country and requested condition. |
| 2. Evidence | Request clear nameplate, connector, full-product and packaging photographs for the unit offered. |
| 3. Compatibility | Compare suffixes, interfaces, ratings and application information before replacement. |
| 4. Packing | Prepare protective packaging suitable for international industrial spare shipment. |
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Model availability and exact configuration should be checked against the complete product label before ordering.
Send the exact order code, quantity and destination for an availability and compatibility review.
