Description

The Siemens 6ES5951-7LB14 is a robust power supply unit designed specifically for the Simatic S5-115U and S5-115H programmable controller systems. As a core component of the PS 951 series, this module converts standard industrial AC line voltages into the stable, low-voltage DC power required for the rack backplane and associated I/O or communication modules. It is engineered to provide consistent power delivery in demanding automation environments, ensuring reliable operation of the CPU and connected signal processing hardware.

Features

• Designed for seamless integration with Simatic S5-115U and S5-115H rack-based systems.
• Wide-range input capability supporting both 110/120 V AC and 220/240 V AC nominal grids.
• Delivers a stabilized 5 V DC output at 3 A to the system backplane.
• Integrated battery backup compartment supports data retention for system memory during power interruptions.
• Aluminum chassis construction for optimized thermal management and structural durability.
• Passive cooling design suitable for standard industrial control cabinet mounting.

Technical Specifications

Installation Guidelines

• Ensure the main power source is disconnected before inserting or removing the module from the S5 rack.
• Verify that the input voltage selection matches the local power grid requirements prior to energizing.
• Maintain adequate clearance around the module's ventilation windows to prevent overheating during operation.
• Ensure the backplane connectors are fully seated and the module is securely fastened to the rack housing.
• Handle with care to avoid damage to the pins or the integrated battery compartment assembly.
• Use appropriate ESD precautions when handling the module to protect internal electronic components.

FAQ

Does this power supply include a battery?

The unit features a compartment for a C-size Lithium battery (such as the CA-6EW1000-7AA) used for memory backup, though batteries are typically sold separately. Please check your specific shipment contents.

Is this module compatible with other S5 series racks?

The 6ES5951-7LB14 is specifically designed for the S5-115U and S5-115H series. It is not intended for use with other S5 rack sizes or different Siemens controller families.

What is the primary function of the 3 A output?

The 5 V DC / 3 A output provides the necessary logic power for the CPU and any communication or interface modules installed within the same S5 backplane segment.