Siemens 6ES5930-7AA31 Power Supply

This power supply provides regulated DC voltage for SIMATIC S5 automation systems. It converts AC mains power to stable outputs for all backplane modules. Therefore, this component ensures reliable operation of CPUs and I/O modules.

Physical Dimensions and Weight Specifications

The Siemens 6ES5930-7AA31 features a rugged metal housing for heat dissipation. Its width occupies a single standard slot in the S5 rack. The total depth reaches 233 mm for backplane connectivity. Consequently, technicians can install this unit alongside other modules without spacing issues.

Interface Types and Connection Layout

The Siemens 6ES5930-7AA31 provides a 3-terminal AC input block on the top. A 4-terminal DC output block connects directly to the backplane bus. The front panel carries LED indicators for output status and overload warnings. Hence, operators can monitor power conditions at a quick glance.

Component Count and Internal Architecture

This power supply contains one main transformer and a rectifier bridge circuit. The board holds three large electrolytic capacitors for output filtering. You will also find a linear regulator for clean 5V output. An onboard thermal fuse shuts down the unit during overheating events.

Energy Storage and Hold-Up Time

The Siemens 6ES5930-7AA31 stores energy in three 1500µF output capacitors. This storage provides a 20 ms hold-up time after AC loss. Therefore, the backplane modules continue operating during brief power interruptions. The unit requires no external battery for this function.

Protection Features and Operating Limits

The module includes short-circuit protection on both output rails. It also features over-voltage clamping for sensitive backplane components. Users can operate this supply in temperatures from 0°C to 55°C. Natural convection cooling eliminates the need for an internal fan.