6ES7407-0KA02-0AA0 - Power Supply Module - SIEMENS

SIEMENS SIMATIC S7-400 PS 407 power supply - 6ES7407-0KA02-0AA0

The PS 407 power module, part number 6ES7407-0KA02-0AA0, is part of the SIMATIC S7-400 series from SIEMENS. Designed to feed the racks and cards of an industrial programmable controller, it converts a 120–230 V AC/DC input into regulated 5 V and 24 V DC outputs, with available current up to 10 A. This design ensures stable power to the backplane bus and associated electronics even during mains disturbances. An integrated 20 ms hold-up time for brief mains dips, short-circuit protection and integrated galvanic isolation secure operation in industrial environments. The unit mounts directly on the S7-400 rack, accepts a 3-wire input and provides LED indicators for input status and faults. It operates from -25 to +60°C and its compact 50 × 290 × 217 mm dimensions ease integration into SIEMENS-specified chassis.

Technical specifications

• Manufacturer part number : 6ES7407-0KA02-0AA0
• Range : SIMATIC S7-400, PS 407 power supply module
• Manufacturer : SIEMENS
• Type : Power supply module for PLC rack
• Input voltage : 120–230 V AC/DC
• Output voltages : 5 V DC and 24 V DC, regulated
• Output current : up to 10 A
• Power dissipation : 20 W
• Hold-up time : 20 ms on mains failure
• Temperature range : -25 to +60°C in operation
• Protections : short-circuit protection, current limiting and status monitoring
• Galvanic isolation : integrated between input and outputs
• Connection : 3-wire input
• Mounting : on standard SIMATIC S7-400 rack
• Indicators : LEDs for input status and fault
• Dimensions : 50 × 290 × 217 mm
• Origin : Germany

Overview of the SIMATIC S7-400 PS 407 range

The PS 407 series is dedicated to powering SIMATIC S7-400 systems. These power supplies deliver the logic voltages required by the backplane bus and the CPU, I/O and expansion modules. Built for large automation architectures, they provide proven electrical stability and resistance to the harsh ambient conditions common in industrial sites. Integrated protection devices, galvanic isolation and local LED indication simplify diagnostics and help maximise system availability. Modules in this range mount mechanically on SIEMENS racks, with controlled footprint and standardised wiring interfaces. Compatibility with existing S7-400 ecosystems allows maintenance and upgrades without specific power-supply software reconfiguration.

• PS 407 power supplies : Designed to provide regulated 5 V and 24 V DC required by S7-400 chassis, with protections and local diagnostics.
• S7-400 integration : Direct mounting on standard rack, interchangeability within the SIMATIC family for maintenance and replacement.

The model 6ES7407-0KA02-0AA0 follows this reliability and continuity-of-service approach for demanding automation architectures.

Industrial applications

This power module is intended for environments where stable logic voltages determine the availability of the programmable controller and production lines.

• Continuous processes : chemical, oil and gas, water treatment, where mains disturbances need filtering and compensation via an adequate hold-up time.
• Discrete manufacturing : assembly, packaging, material handling, with S7-400 controllers driving conveyors, robots and distributed I/O.
• Machine tools and CNC : machining lines driven by numerical control with an S7-400 for sequencing and supervision.
• Infrastructure : industrial buildings, HVAC, local substations needing stable power for controllers and interfaces.
• Food and paper industries : continuous lines where immunity to micro-outages prevents unexpected stoppages.

Integration and operation

The PS 407 module mounts directly on the SIMATIC S7-400 rack. The 3-wire input supports 120–230 V AC/DC supply. LED status indicators report input presence and faults, easing first-level diagnostics. No software configuration is required, reducing downtime during replacement. The galvanic isolation improves electrical safety and limits disturbance propagation between the mains and logic circuits. Short-circuit protection helps preserve the integrity of connected modules. The 20 W power dissipation and operating range -25 to +60°C meet industrial cabinet specifications.

In an automation architecture, the power supply is the system's energy interface. By providing stable 5 V and 24 V up to 10 A, this module reduces CPU resets, bus errors and I/O dropouts during short mains dips. The 20 ms hold-up time gives useful margin against micro-outages and rapid variations, a critical parameter in workshops subject to current surges or electromagnetic stress.

Availability and warranty

The SIEMENS power module 6ES7407-0KA02-0AA0 is offered by Standard Exchange Industry new or refurbished, as exchange units or repaired items depending on the condition of your equipment. Each refurbished unit is bench-tested and supplied with a warranty of 6 to 24 months depending on the chosen service. Fast shipping within 24 to 72 h to over 120 countries to minimise production downtime. Our technical team assists you to confirm compatibility with your SIMATIC S7-400 rack, secure the replacement and plan restart in line with manufacturer recommendations.