Siemens 6ES5095-8MC01 SIMATIC S5-95U PLC CPU
Het item werd toegevoegd aan uw offerteaanvraag
Product Information
The Siemens 6ES5095-8MC01 is a SIMATIC S5-95U PLC CPU module that provides the central processing function in compatible SIMATIC S5 control systems. It operates from a 24 V DC supply and provides 16 KB of internal program memory, expandable up to 64 KB according to the installed system configuration. Two integrated AS511 serial TTY interfaces with 15-pin Sub-D connectors support Siemens programming connections and point-to-point communication.
A replacement CPU can be commissioned using a compatible EPROM or EEPROM memory submodule containing the existing PLC program, or by transferring the project from a PC with Siemens STEP 5 software and a PC-TTY adapter cable. Before installation, the replacement must match the existing hardware configuration and module or sub-rack alignment. The AS511 interfaces are used for programming, parameter transfer and communication, so the connection method and transferred configuration must be checked during commissioning. ABC Industrial Parts can support preparation of a replacement unit and transfer of stored PLC data.
The RUN, STOP and FAULT indicators provide the primary local status information: RUN indicates normal CPU operation, STOP indicates that the CPU is halted, and FAULT indicates a system fault or CPU hardware error. STEP 5 provides access to PLC status, the diagnostic buffer, ISTACK and BSTACK through AS511. A non-recoverable internal CPU failure requires unit replacement, making a tested spare or repair exchange relevant for restoring a legacy S5 installation.
Technical Specifications
| Manufacturer | Siemens |
| Part number | 6ES5095-8MC01 |
| Model/type | SIMATIC S5-95U CPU |
| Component type | PLC CPU module |
| Product family | SIMATIC S5 |
| Supply voltage | 24 V DC |
| Internal program memory | 16 KB |
| Expandable program memory | Up to 64 KB |
| Integrated communication interfaces | 2 |
| Interface type | AS511 TTY / 20 mA current loop |
| Interface connector | 15-pin Sub-D |
| Communication protocol | AS511 |
| Program storage | EPROM / EEPROM memory submodules |
| Product lifecycle status | Obsolete |
| Recommended successor | 6ES5095-8MC02 |
Programming and Configuration
Programming, configuration and diagnostics are performed with Siemens STEP 5 software through an AS511 connection. A PC-TTY adapter cable provides the connection between the programming PC and the S5 controller for program and parameter transfer.
The PLC program can be transferred to a replacement CPU using a compatible EPROM or EEPROM memory submodule, or by downloading the project from the programming PC. The installed memory submodule and the replacement hardware configuration must match the requirements of the existing S5 system before the CPU is commissioned.
Communication and System Integration
The 6ES5095-8MC01 has two integrated AS511 serial TTY interfaces. These interfaces use a 20 mA current loop and 15-pin Sub-D connectors for Siemens programming, parameter transfer and point-to-point serial communication.
The dual AS511 arrangement supports installations requiring two AS511 connections. During replacement, verify the connected interface, cable arrangement and communication role before transferring the configuration and returning the S5-95U control system to operation.
Diagnostics and Status Indication
Local status is indicated by the RUN, STOP and FAULT indicators. RUN identifies normal CPU operation, STOP identifies a halted CPU, and FAULT indicates a system fault or CPU hardware error.
For deeper troubleshooting, Siemens STEP 5 can read PLC status, the diagnostic buffer, ISTACK and BSTACK through AS511. When the FAULT condition results from a non-recoverable internal CPU failure, replacing the CPU or using a repair exchange is required.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| RUN | CPU is operating normally in RUN state. | |
| STOP | CPU is halted or in STOP state. | |
| FAULT | System fault or CPU hardware error detected. A non-recoverable internal CPU failure requires unit replacement. |
Replacement and Spare Part Considerations
For a Siemens S5-95U CPU replacement, check the exact part number 6ES5095-8MC01, the dual AS511 interface arrangement, the 24 V DC supply and the installed memory configuration. The program can be restored from a compatible EPROM or EEPROM memory submodule or transferred with STEP 5 through a PC-TTY adapter cable.
The CPU is obsolete and its recommended successor is 6ES5095-8MC02. A successor or alternative must be assessed against the existing hardware configuration, memory submodule and AS511 connections; migration to a newer SIMATIC S7-1200 or S7-1500 platform requires hardware replacement and complete program re-engineering rather than a direct drop-in substitution.
After installation, confirm module or sub-rack alignment, restore the PLC program or memory submodule, check the AS511 connection and use STEP 5 to review PLC status and diagnostic information before returning the machine to service.
Frequently Asked Questions
What is the Siemens 6ES5095-8MC01?
The 6ES5095-8MC01 is a Siemens SIMATIC S5-95U PLC CPU module for compatible legacy S5 control systems. It operates at 24 V DC and has two integrated AS511 serial TTY interfaces.
Which software is used to program and diagnose the S5-95U CPU?
Siemens STEP 5 is used for programming, configuration, PLC status access and diagnostics through an AS511 connection.
How can the PLC program be transferred to a replacement CPU?
The program can be transferred using a compatible EPROM or EEPROM memory submodule, or downloaded from a PC running STEP 5 through a PC-TTY adapter cable.
What interfaces does the 6ES5095-8MC01 provide?
The CPU provides two integrated AS511 interfaces using a TTY / 20 mA current-loop interface and 15-pin Sub-D connectors.
What do the RUN, STOP and FAULT indicators mean?
RUN indicates normal CPU operation, STOP indicates that the CPU is halted, and FAULT indicates a system fault or CPU hardware error. STEP 5 can be used to read the diagnostic buffer, ISTACK and BSTACK.
Is the 6ES5095-8MC02 a direct drop-in replacement for the 6ES5095-8MC01?
The 6ES5095-8MC02 is the recommended successor, but replacement suitability must be assessed against the existing hardware configuration, memory submodule and AS511 connections.
Take advantage of our exchange formula
A defective product does not have to be worthless. At ABC Industrial Parts, you can hand in defective products and immediately benefit from a discount on your new purchase. This is a smart way to save money while contributing to a circular economy.
Play it safe with our warranty conditions
Industrial plants prefer to keep running invariably, no matter what. Therefore, it is essential that you can rely on high-quality products and/or sustainable repairs. With our warranty conditions, you can count on certainty, whether you choose new, used or repaired products.
Data backup and recovery
Have you lost valuable parameters or data due to a malfunction while the manufacturer no longer provides support? At ABC Industrial Parts, we help you secure this data, both for common and specific products.
Specific firmware and hardware versions
If you are working with specific hardware or firmware versions that are no longer available from the manufacturer, ABC Industrial Parts is your partner. When making your enquiry, clearly state which versions you need, we will then look at the possibilities of supplying those versions, so that your installations continue to function optimally.
Disclaimer:
We are not an authorised distributor of Siemens.
Product photos are for illustration purposes only and may differ from the actual product delivered.
Some of the content on this page was created with the help of AI. While we strive to provide accurate and up-to-date information, errors may occur.