SIEMENS SIMATIC S5 6ES5951-7LB21 Vers. 02

SIEMENS SIMATIC S5 6ES5951-7LB21 Vers. 02
Power supply module 951 for reliable system power in SIMATIC S5-115U/H PLC installations.

Category: Industrial Automation / PLC Power Supply Module
Purpose: Supplying regulated internal power to SIMATIC S5-115U/H automation systems

🌿 What It Is
The Siemens SIMATIC S5 6ES5951-7LB21 is a Power Supply 951 module designed for SIMATIC S5-115U/H PLC systems. It accepts 120/230 V AC input and provides a regulated 5 V DC / 3 A output for the internal PLC system electronics. Siemens product data identifies this model as a spare part power supply for S5-115U/H systems without backup battery.

✅ Key Benefits

• Designed for SIMATIC S5-115U/H PLC systems
• Provides stable 5 V DC / 3 A system power
• Supports 120/230 V AC input supply
• Power Supply 951 format for legacy Siemens S5 installations
• Suitable for PLC rack maintenance and replacement
• Version Vers. 02 for matching existing system revisions
• Reliable spare part for older industrial automation systems
• Helps maintain production lines using SIMATIC S5 hardware

🧴 Use & Installation

1. Verify compatibility with the existing SIMATIC S5-115U/H rack.
2. Disconnect mains power before removing or installing the power supply.
3. Install the 6ES5951-7LB21 module into the correct power supply position.
4. Connect the 120/230 V AC input according to the Siemens wiring documentation.
5. Check the PLC system voltage, CPU status, and module diagnostics before production use.

⚠️ Safety & Precautions

• Installation must be performed by qualified electrical or automation personnel.
• Disconnect power before mounting, wiring, or replacing the module.
• Use only with compatible SIMATIC S5-115U/H systems.
• Check input voltage selection, grounding, and wiring before commissioning.
• This model is specified without backup battery, so check memory backup requirements separately.
• Use under technical supervision in industrial automation environments.

📦 Product Details
Form: PLC power supply module
Active Components: SIMATIC S5 Power Supply 951
Target Group: Automation engineers, PLC technicians, maintenance teams, machine builders
Manufacturer: Siemens
Article Number: 6ES5951-7LB21
Alternative Number: 6ES5 951-7LB21
Version: Vers. 02
Product Family: SIMATIC S5
Compatible System: S5-115U/H
Input Voltage: 120/230 V AC
Output Voltage: 5 V DC
Output Current: 3 A
Backup Battery: Not included / without backup battery
Application Areas: Legacy PLC systems, machine automation, production line maintenance, control cabinet repairs
Pack Size: 1 power supply module

🛒 Buy SIEMENS SIMATIC S5 6ES5951-7LB21
Order the Siemens SIMATIC S5 Power Supply 951 6ES5951-7LB21 Vers. 02 from Induparts for reliable maintenance and replacement of S5-115U/H PLC power systems.

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