Product Overview

The Siemens 6ES7505-0KA00-0AB0 is a high-efficiency 25W system power supply (PS) engineered specifically for the SIMATIC S7-1500 and ET 200MP automation platforms. Unlike standard external power sources, this module is an integral part of the rack architecture, designed to feed the internal backplane bus. It bridges the gap between the external 24V DC supply and the internal electronic requirements of the CPU and I/O modules. By ensuring a consistent and isolated power flow across the backplane, the 6ES7505-0KA00-0AB0 maintains system stability even in complex configurations where the CPU's integrated power supply may reach its capacity.

Essential Hardware Parameters & Data

This module is designed for seamless DIN rail mounting within the S7-1500 rack, offering robust protection against the electrical instability often found on factory floors.

• Input Voltage: 24V DC (Nominal)

• Permissible Range: 19.2V to 28.8V DC

• Power Output: 25 Watts to the backplane bus

• Mains Buffering: 20 ms (per NAMUR recommendation)

• Power Loss: Typical 6.2 Watts

• Isolation: 707V DC (Type test between input and backplane)

• Module Width: 35 mm

• Physical Dimensions: 35 mm x 147 mm x 129 mm

• Net Weight: 0.35 kg

• Packaged Weight: 0.95 kg

• Configuration Tool: STEP 7 / TIA Portal V12 or higher

Strategic Industrial Implementations

Complex Multi-Module RacksIn large-scale S7-1500 installations featuring extensive analog and communication modules, the internal CPU power is often insufficient. The 6ES7505-0KA00-0AB0 provides the necessary supplemental power to ensure every module on the rack operates at peak performance without data drops.

Voltage-Sensitive Processing EnvironmentsIn industries such as chemical processing or semiconductor manufacturing, even minor voltage sags can interrupt logic execution. This power supply module acts as a buffer, filtering external 24V DC noise and providing 20ms of mains buffering to maintain system uptime during transient power issues.

Distributed I/O Stations (ET 200MP)When the ET 200MP is used in a distributed architecture via an interface module (IM), this system power supply ensures that the I/O modules receive the localized voltage regulation required for accurate signal processing and high-speed communication.

Redundant Power ArchitecturesBy incorporating this module into a TIA Portal-managed system, engineers can implement sophisticated power management and diagnostic routines, ensuring that any failure in the primary supply line is immediately flagged for preventative maintenance.