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Core Power Delivery for S5-115U/H PLC Systems
The Siemens 6ES5951-7NB13 is a PS951 power supply module for the SIMATIC S5-115U/H programmable logic controller family . This unit converts an input voltage of 19.2-30V DC into multiple regulated DC outputs for the CPU, I/O modules, and backplane bus. Consequently, it is an essential component for building reliable S5-115U/H automation stations.
Versatile Output Specifications
The PS951 generates three independent output voltages to power different sections of the PLC rack . It delivers a main 5V DC output at 3A, an auxiliary 5.2V DC output at 1A, and a 24V DC output at 0.2A . Furthermore, its modular design simplifies integration with other SIMATIC S5 components . The module also incorporates overload, short-circuit, and overheating protections for enhanced safety and reliability .
Technical Specifications and Physical Attributes
Engineers designed this unit for standard industrial environments with an IP20 rating. Its compact form factor allows for efficient use of space within the S5 control cabinet .
| Parameter | Specification |
|---|---|
| Manufacturer / Series | Siemens / SIMATIC S5-115U/H |
| Product Model | 6ES5951-7NB13 |
| Module Type | PS951 Power Supply Unit |
| Input Voltage | 19.2 – 30 V DC |
| Output 1 | 5 V DC @ 3 A |
| Output 2 | 5.2 V DC @ 1 A |
| Output 3 | 24 V DC @ 0.2 A |
| Protection Class | IP20 |
| Dimensions (W x H x D) | 6.5 cm x 20.5 cm x 31.0 cm |
| Weight | approx. 1.36 kg |
| Product Status | Discontinued |
Application in Legacy S5 Systems
Plant engineers rely on this power supply to maintain and support existing S5-115U/H-based automation systems . It is a critical component for industries where these legacy controllers remain in daily use. Therefore, sourcing tested units is essential for lifecycle management of classic Siemens automation platforms .