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Description
The Siemens 6ES5951-7LB14 is a dedicated power supply module from the Simatic S5 series, specifically engineered to support the S5-115U and S5-115H programmable logic controller systems. This PS 951 unit is designed to provide stable, regulated DC power to the PLC backplane, ensuring consistent operation for CPU, I/O, and communication modules within the rack. It is a critical component for maintaining system integrity in demanding industrial environments, preventing downtime caused by voltage fluctuations or grid instability.
Features
- Designed for seamless integration with Simatic S5-115U and S5-115H rack systems.
- Wide-range AC input compatibility supporting 110/120 V and 220/240 V AC networks.
- Delivers a stable 5 V DC output at 3 A to the backplane bus.
- Includes an integrated battery compartment for memory backup functionality using C-size Lithium cells.
- Robust aluminum chassis design with passive cooling windows for optimal thermal management.
Applications
This power supply is widely utilized in legacy automation environments where S5-115U/H series controllers remain in service. Typical applications include water treatment facilities, power generation control systems, and heavy manufacturing production lines where reliable power conversion is essential for continuous process monitoring and control.
Technical Specifications
| Model |
6ES5951-7LB14 |
| Series |
Simatic S5-115U / S5-115H |
| Input Voltage |
110 to 240 VAC (50/60 Hz) |
| Output Current |
3 A at 5 VDC |
| Power Consumption |
35 W |
| Operating Temperature |
0 to 60 deg C |
| Backup Battery |
C-Size Lithium (CA-6EW1000-7AA) |
Installation Guidelines
- Ensure the main power source is disconnected before inserting or removing the module from the rack.
- Verify that the input voltage selection matches the local power grid requirements.
- Install the module in a clean, dry environment with adequate clearance above and below the unit for passive ventilation.
- Use appropriate ESD protection when handling the module to prevent damage to internal logic components.
- Ensure the backplane connectors are fully seated to prevent intermittent power loss or contact oxidation.
FAQ
Does this module include a backup battery?
The 6ES5951-7LB14 is equipped with a battery compartment designed for a C-size Lithium battery, but the battery cell itself is typically supplied separately as a maintenance item.
Is this module compatible with other S5 series racks?
This specific PS 951 model is optimized for the Simatic S5-115U and S5-115H series. Please verify your specific rack configuration before installation to ensure compatibility.
