Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Siemens 6ES5095-8FA01 |
| Manufacturer | Siemens AG |
| Product Type | Central Unit / Failsafe CPU Module |
| Series | SIMATIC S5-95F |
| Product Description | Single PLC for Redundant System (F-Type) |
| Memory (Internal RAM) | 16 KByte |
| Number of Timers | 128 (not retentive, 0.01 to 9990 s range) |
| Number of Counters | 128 (8 retentive, 0 to 999 range) |
| Bit Memories | 2048 (512 retentive) |
| Onboard Digital Inputs | 16; safety-related, 24V DC, 10mA, interrupt capable |
| Onboard Digital Outputs | 8; safety-related, 24V DC, 750mA |
| Hardware Counters | 2; safety-related, 24V DC, 900Hz |
| Programming Interface | PG (AS511 protocol, TTY/RS232) |
| Communication Capabilities | SINEC L1 (slave), PROFIBUS-DP (slave via CP 541) |
| Expansion Capacity | Up to 32 S5-100U I/O modules |
| Supply Voltage | 24 V DC (20 to 30 V) |
| Current Consumption | Approx. 1 A at max. I/O configuration |
| Power Dissipation | Typically 15-25 W |
| Operating Temperature (Horizontal Assembly) | 0 to 60 °C |
| Operating Temperature (Vertical Assembly) | 0 to 40 °C |
| Storage Temperature | -40 to 70 °C |
| Humidity Rating | 15% to 95% (non-condensing) |
| Dimensions (H×W×D) | 145 × 135 × 146 mm |
| Weight | Approx. 1.3-1.5 kg |
| Degree of Protection | IP20 |
Main Features and Advantages
Redundant failsafe architecture: The Siemens 6ES5095-8FA01 is uniquely designed for 1:1 hot standby redundancy. Two Siemens 6ES5095-8FA01 central units can be coupled via a fiber optic synchronization cable, creating a system where one unit actively controls the process while the other remains synchronized and ready to take over without any interruption in the event of a fault. This feature makes the Siemens 6ES5095-8FA01 indispensable for applications where downtime is unacceptable.
Integrated safety functionality: The Siemens 6ES5095-8FA01 includes a range of onboard safety-related I/O: 16 failsafe digital inputs capable of generating alarms with a 10 ms response time, 8 failsafe digital outputs rated at 750mA, and two hardware counters configurable for safety-related speed monitoring. This integration reduces the need for external safety modules and simplifies the overall system design while maintaining the highest safety integrity levels.
Robust program and data handling: With 16 KB of internal RAM, the Siemens 6ES5095-8FA01 can host complex user programs developed in STEP 5 using Statement List (STL), Ladder Diagram (LAD), or Function Block Diagram (FBD). The module supports EPROM memory submodules for failsafe program storage, ensuring that the application remains intact even after power loss. The Siemens 6ES5095-8FA01 also features an integrated real-time clock for time-stamping events, a diagnostic byte for monitoring counter comparisons and power supply status, and a communication byte for alarm processing control.
Legacy system life extension: As the S5 series has been discontinued, the Siemens 6ES5095-8FA01 is no longer in production, making it a critical resource for facilities running S5-95F redundant systems. For maintenance teams, the Siemens 6ES5095-8FA01 offers a direct, drop-in replacement path that avoids the engineering effort and cost of migrating to a newer platform while ensuring continued reliability in legacy automation environments.
