Siemens 6ES5950-8MD11 Power Supply | 5V 10A / 24V 2A

This Siemens power supply module provides stable DC power for S5 automation racks. The Siemens 6ES5950-8MD11 converts AC mains into regulated DC outputs for system operation. Its robust design ensures reliable performance under fluctuating line conditions. This module supplies power to the rack’s backplane and all connected modules.

Physical Dimensions and Mounting Specifications

The power supply module measures 232 mm in height and 25 mm in width. Its overall depth reaches 160 mm including the front connector. This unit weighs approximately 0.85 kilograms for stable rack installation. The housing features a rugged metal casing with ventilation slots. The Siemens 6ES5950-8MD11 plugs directly into the S5 rack’s designated slot. A 48-pin backplane connector transfers power to the rack’s bus.

Input and Output Specifications

This power supply accepts 120 V AC or 230 V AC input voltages. The input frequency range covers 47 Hz to 63 Hz for global compatibility. The output provides 5 V DC at 10 A for logic circuits. A separate 24 V DC output delivers 2 A for relay and field circuits. The Siemens 6ES5950-8MD11 offers a total output power of 98 W. Line regulation stays within ±0.1% for stable system operation. Load regulation remains within ±0.5% under varying load conditions. Efficiency reaches 87% under typical load conditions.

Protection and Diagnostic Features

This power supply includes overvoltage protection for all output rails. Short-circuit protection automatically limits output current during faults. Thermal protection shuts down the unit during excessive temperature conditions. The Siemens 6ES5950-8MD11 features an integrated 3300 µF capacitor for energy storage. This capacitor provides hold-up time of approximately 25 milliseconds. A front panel LED indicates the output status and fault conditions.

Detailed Specification Table

Parameter	Specification
Dimensions (H x W x D)	232 mm x 25 mm x 160 mm
Weight	Approx. 0.85 kg
Input Voltage	120 V AC or 230 V AC (selectable)
Input Frequency	47 Hz to 63 Hz
5 V DC Output	10 A
24 V DC Output	2 A
Total Output Power	98 W
Line Regulation	±0.1%
Load Regulation	±0.5%
Efficiency	87% (typical)
Hold-up Capacitance	3300 µF
Hold-up Time	Approx. 25 ms
Operating Temperature	0°C to 60°C

Installation and Commissioning Guidelines

Insert this power supply into the far-left slot of the S5 rack. Connect the AC mains to the designated terminal block securely. Select the correct input voltage using the selector switch before power-on. The Siemens 6ES5950-8MD11 operates effectively between 0°C and 60°C. Ensure adequate airflow around the unit for proper heat dissipation. Verify the output voltage using a multimeter after initial power-up. Monitor the LED indicator for normal operation status.