Key Features
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All-in-One Compact Design – Integrates CPU, 24V DC power supply, and I/O into a single housing (approximately 151 × 154 × 159 mm), reducing cabinet space and eliminating the need for a separate rack and backplane
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Dual AS511 Serial Interfaces – Two AS511 serial interfaces on the front panel: one for connecting a programming device (PG) and a second for connecting an operator panel (OP) or terminal, enabling simultaneous programming and HMI communication
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Comprehensive Onboard I/O – 16 digital inputs (24V DC, including 4 interrupt and 2 counter inputs), 16 digital outputs (24V DC sourcing), 8 analog inputs, and 1 analog output (voltage or current selectable)
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Expandable Architecture – Supports expansion with up to 32 peripheral modules from the S5-100U series via the onboard expansion bus connector
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STEP 5 Programming – Programmed in STL, LAD, or CSF using the SIMATIC S5 programming environment
Technical Parameters
Core Advantages
1. Dual AS511 Interfaces for Flexible Connectivity
The -8MC03 provides two independent AS511 serial interfaces on the front panel. This allows simultaneous connection to a programming device (PG) for online monitoring and program modifications, and to an operator panel (OP) or terminal for HMI functionality — without needing to disconnect one to use the other . This dual-port capability makes the 6ES5095-8MC03 particularly valuable in applications requiring both programming access and operator interface on the same controller.
2. All-in-One Architecture for Compact Control
The S5-95U integrates the CPU, 24V DC power supply, and all onboard I/O into a single compact housing. This eliminates the need for a separate rack, power supply module, and I/O cards, significantly reducing cabinet space and simplifying installation . The turnkey design makes it ideal for OEM machinery, standalone control panels, and building services applications where panel space is at a premium.
3. Comprehensive Onboard I/O
The 6ES5095-8MC03 provides a versatile I/O mix directly on the CPU: 16 digital inputs (including 4 alarm and 2 counter inputs), 16 digital outputs, 8 analog inputs, and 1 analog output that can be switched between voltage and current modes . This onboard capability handles many applications without requiring additional expansion modules.
4. Expandable for Larger Applications
Despite its compact size, the S5-95U can be expanded with up to 32 peripheral modules from the S5-100U series, including digital I/O, analog I/O, and special function modules . This scalability makes it suitable for a wide range of application sizes, from simple standalone control to more complex systems.
5. Proven Legacy Platform with Migration Path
The SIMATIC S5 series has a long track record of reliable operation in demanding industrial environments . For new installations or major redesigns, the closest modern equivalent is the S7-1200 (CPU 1214C for compact applications) or S7-1500 (CPU 1511 for higher performance). However, STEP 5 programs do not auto-convert to STEP 7 — migration requires manual porting guided by Siemens migration documentation.
Applications
The 6ES5095-8MC03 is deployed across a range of industrial automation applications:
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What's Included
Why Buy From Us?
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In Stock – Ready to ship immediately
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New Original / Refurbished – Genuine Siemens factory condition or professionally refurbished
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Warranty Included – 12-month warranty for purchase confidence
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Fast Shipping – Expedited shipping options available
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Technical Support – Legacy system compatibility assistance available
Frequently Asked Questions (FAQ)
Q1: What is the Siemens 6ES5095-8MC03?
It is a compact central processing unit from the SIMATIC S5-95U series. It integrates the CPU, 24V DC power supply, and I/O into a single housing, featuring two AS511 serial interfaces for connecting a programming device and an operator terminal simultaneously .
Q2: What distinguishes the -8MC03 from other S5-95U variants?
The -8MC03 is the final revision of the dual-AS511 S5-95U family. It provides two AS511 serial interfaces — one for a PG (programming device) and one for an OP (operator panel) . Other variants offer a single programming port plus PROFIBUS (MB), PROFIBUS-DP slave (MD), or PROFIBUS-DP master (ME) functionality.
Q3: What I/O does this module provide?
It provides 16 digital inputs (24V DC, including 4 alarm and 2 counter inputs), 16 digital outputs (24V DC), 8 analog inputs, and 1 analog output (0–10V / 0–20mA, switchable) .
Q4: How much program memory does the 6ES5095-8MC03 have?
It has 16 KB total memory (8 KB RAM + 8 KB EEPROM) as standard, with 20 KB (16+4) available on Revision 4+ hardware .
Q5: Is this a genuine Siemens product?
Yes. This is a genuine Siemens module manufactured in Germany. Depending on availability, units may be new original or professionally refurbished .
Q6: Is the SIMATIC S5 series still in production?
No. The SIMATIC S5 series has been discontinued by Siemens and replaced by the S7 series. The S5-95U was officially discontinued on 01 October 2020 and deleted without replacement (PLM status PM490) .
Q7: What is the modern replacement for the S5-95U?
The closest functional equivalent is the S7-1200 (CPU 1214C for compact applications) or S7-1500 (CPU 1511 for higher performance). Both are programmed in TIA Portal with STEP 7. STEP 5 programs do not auto-convert — migration requires manual porting .
Q8: What is the weight of this module?
Approximately 1.22–1.272 kg .
Q9: What should I verify before ordering?
Always verify the exact part number (6ES5095-8MC03), confirm your system requirements (dual AS511 ports for PG and OP), and check whether your application requires onboard analog I/O, counters, or expansion modules .
