Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6ES5095-8ME02 |
| Manufacturer | Siemens AG |
| Product Type | SIMATIC S5-95U Central Unit with PROFIBUS-DP Master |
| Product Series | SIMATIC S5-95U Compact Controller |
| Memory Module | 32K EEPROM (required for program storage, e.g., 6ES5374 series) |
| Integrated PROFIBUS-DP | Master interface (included), RS485, 9-way D-sub |
| Supported Baud Rates | 9.6 kbps, 19.2 kbps, 93.75 kbps, 187.5 kbps, 500 kbps, 1.5 Mbps |
| Programming Interface | MPI / TTY 20mA for PG/OP/HMI connection |
| Supply Voltage | 24 V DC (20.4 – 28.8 V DC range) |
| Current Consumption (CPU only) | Typ. 280 mA @ 24 V DC |
| Expansion Capability | Up to 3 × S5-100U series I/O modules (via bus module) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Protection Class | IP20 (cabinet installation) |
| Mounting | 35 mm DIN rail (EN 60715) |
| Dimensions (approx.) | 154 mm × 151 mm × 159 mm |
| Weight (approx.) | 1.3 kg to 1.336 kg |
| Certifications | CE, UL (as per original production) |
| Status | Discontinued (EoL) — Legacy spare parts only |
Main Features and Advantages
Integrated PROFIBUS-DP Master Functionality: The defining feature of the Siemens 6ES5095-8ME02 is its onboard PROFIBUS-DP master interface, which enables direct communication with up to 122 DP slaves as a central controller. This eliminates the need for separate master modules, reducing system complexity and cost. The master interface supports multiple baud rates up to 1.5 Mbps, providing flexibility for various fieldbus configurations. The module’s RUN/STOP mode selector switch controls data exchange with DP slaves—in RUN mode, the Siemens 6ES5095-8ME02 cyclically reads inputs and writes outputs to all configured slaves; in STOP mode, all DP slave outputs are safely set to “0”.
Battery-Free Program Storage: The Siemens 6ES5095-8ME02 requires a 32K EEPROM memory module (such as the 6ES5374 series) to store the STEP 5 user program and bus configuration data. This design offers significant reliability advantages over battery-backed RAM solutions: the program is retained indefinitely without power, eliminating program loss during extended outages and removing the risk associated with battery failure or leakage. This makes the Siemens 6ES5095-8ME02 particularly valuable for critical legacy equipment where program integrity is paramount.
Comprehensive Status Diagnostics: The Siemens 6ES5095-8ME02 provides clear visual status indication through front-panel LEDs: RUN (green), STOP (red), and BF (Bus Fault, red). The BF LED offers detailed diagnostic information about the PROFIBUS network health—off during normal operation, flashing when at least one DP slave cannot be addressed, and steady on during bus errors such as cable short circuits or configuration mismatches. This diagnostic capability accelerates troubleshooting and reduces mean time to repair.
Compact Form Factor and Flexible Expansion: Despite its powerful communication capabilities, the Siemens 6ES5095-8ME02 maintains a compact footprint suitable for space-constrained control cabinets. The module supports expansion with up to three S5-100U series I/O modules via a bus module connection, allowing system designers to add digital or analog I/O capacity as application requirements grow. The Siemens 6ES5095-8ME02 also provides an MPI interface for connection to programmers, operator panels, or HMI devices via a 20mA TTY interface, facilitating program download, online monitoring, and operator interaction.
Legacy System Sustainment: With the SIMATIC S5 series long discontinued, the Siemens 6ES5095-8ME02 serves as a vital spare part for maintaining operational continuity in facilities with substantial S5 infrastructure. For organizations that cannot justify the cost and requalification effort of migrating to modern platforms, the Siemens 6ES5095-8ME02 provides the most cost-effective path to continued equipment service life.
