The Siemens 6ES5951-7LB14 is a dedicated power supply unit from the PS 951 series, engineered specifically for the Simatic S5-115U and S5-115H programmable logic controller (PLC) systems. This module provides essential power regulation by converting standard AC grid inputs into the stable 5 V DC supply required for rack-mounted CPU, I/O, and communication modules. Designed for industrial longevity, it serves as a critical component in maintaining the continuous operation of automation systems in demanding environments, effectively preventing system resets and protecting memory integrity during power fluctuations.
Features
Designed for seamless integration with S5-115U and S5-115H rack backplanes.
Wide-range input voltage compatibility supporting 110/120 V AC or 220/240 V AC at 50/60 Hz.
Delivers a stable 3 A output current to the system bus.
Integrated battery backup compartment for volatile memory retention (compatible with C-size lithium cells).
Rugged aluminum housing with passive ventilation for heat dissipation.
Designed for continuous duty cycles in harsh industrial settings.
Technical Specifications
Model
6ES5951-7LB14
Series
Simatic S5-115U / S5-115H
Input Voltage
110 to 240 VAC (50/60 Hz)
Output Voltage
5 VDC
Output Current
3 A
Power Consumption
35 W
Operating Temperature
0 to 60 deg C
Installation Guidelines
Ensure the PLC rack is powered down before inserting or removing the power supply module.
Slide the module into the designated slot on the S5 rack, ensuring the rear connector is properly seated in the backplane.
Secure the module using the integrated locking mechanism or mounting screws to ensure proper grounding through the chassis.
Verify that the input voltage selection matches the local power grid configuration before applying power.
Maintain adequate clearance around the ventilation windows to allow for natural convection cooling.
Handle with standard ESD precautions to prevent damage to internal logic circuits.
FAQ
Does this module support battery backup?
Yes, the 6ES5951-7LB14 includes a dedicated compartment for a C-size lithium battery, which is used to preserve volatile memory contents during power outages.
What systems is this power supply compatible with?
This unit is specifically engineered for the Siemens Simatic S5-115U and S5-115H PLC series.
What is the primary output of this module?
The module provides a regulated 5 V DC output at 3 A to the rack backplane to support the processing and communication modules installed in the system.
