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The Siemens PS 950 (6ES5950-3AA51) is a specialized power supply module engineered for the Simatic S5-135U and S5-155U automation systems. This unit provides reliable, regulated DC power to the PLC backplane, ensuring stable operation of the CPU and associated I/O modules. Designed for demanding industrial environments, the PS 950 effectively manages line fluctuations and provides robust protection against electrical disturbances, which is critical for maintaining process continuity in manufacturing and power generation applications.
| Model | 6ES5950-3AA51 |
| Input Voltage | 120 VAC / 230 VAC (selectable) |
| Frequency | 50-60 Hz |
| Output Voltages | 5 VDC, 24 VDC |
| Max Output Current | 10 A at 5 VDC |
| Max Power Capacity | 120 W |
| Operating Temperature | 0 to 60 deg C |
| Storage Temperature | -40 to 70 deg C |
| Cooling Method | Natural convection |
Is this module compatible with S5-115U systems?
No, the PS 950 is specifically designed for the S5-135U and S5-155U rack systems. It is not physically or electrically compatible with the S5-115U series.
Does this unit require external cooling fans?
No, the PS 950 utilizes a passive cooling design with integrated heat sinks. It is designed to operate via natural convection, provided the installation guidelines regarding clearance are followed.