Siemens 6ES7407-0KA02-0AA0

It is a PS407 industrial power supply module matching Siemens SIMATIC S7-400 series SPSS, specially designed to provide stable DC power for the backplane bus of S7-400 racks. This module supports wide-range universal 120 V/230 V AC/DC input, delivers a rated 5 In DC / 10 A main output, and integrates an auxiliary 24 V DC system output. Adopting industrial-grade reliable designs including mains power dip buffering, real-time fault diagnosis, and lithium-battery data retention upon power loss, it serves as the mainstream standard power supply unit for medium-scale S7-400 control systems and is widely applicable to various process industry and discrete manufacturing automation scenarios.

Bit-by-bit Model Code Breakdown

Vollständiges Modell: `6ES7 407-0KA02-0AA0`

1. 6ES7: Standard prefix identifier for Siemens SIMATIC S7 series automation products
2. 407: Major product category code, corresponding to PS407 power supply modules of the S7-400 series
3. 0KA02: Specification and hardware revision code

1st character `0`: Basic category identifier for power supply modules

2nd character `K`: Power rating identifier, representing 5 In DC / 10 A output and wide voltage input specification

3rd & 4th characters `A02`: Hardware iteration revision number

4. 0AA0: Suffix function code, indicating standard version without special customized functions

Grundlegende technische Spezifikationen

Cross-reference of Same Series Models (Full PS407 Range)

Typische Anwendungsszenarien

Standard rack power supply for Siemens S7-400 series PLC control systems

PLC control stations and DCS systems in process industries including metallurgy, chemisch, and thermal power

Discrete automation production lines such as complete vehicle & auto parts manufacturing, logistics sorting

Automation monitoring systems for infrastructure including municipal water treatment and rail transit

Redundant industrial control systems requiring high power supply reliability

Common Troubleshooting Matrix

Typical Applications in Metallurgical Industry

1. PCS7 Control System for Blast Furnace Coal Injection

Project Background: Blast furnace coal injection is a core link of ironmaking processes. Power supply faults will directly interrupt coal injection, cause furnace condition fluctuations and even production safety accidents, demanding extremely high power supply continuity.

Systemkonfiguration: Siemens PCS7 redundant control system is adopted. The main rack is equipped with 2 pcs of 6ES7407-0KA02-0AA0 (PS407 10 A) power supply modules for 1:1 redundant power supply, paired with redundant CPU 414-4H controllers and CP443-1 Ethernet communication modules. On-site ET200M remote I/O stations collect process parameters including pulverized coal concentration, pipeline pressure and silo temperature to realize closed-loop control of actuators such as coal feeders and injection valves.

Anwendungswert: The dual-power redundant architecture achieves millisecond-level bumpless switching, completely avoiding system shutdown caused by single power supply failure. The module’s wide voltage input characteristic adapts to mains fluctuations induced by startup/shutdown of large plant equipment. Zero power-side faults occurred after commissioning, and the operational stability of the blast furnace coal injection system reaches over 99.5%.

2. PLC Control System for Section Steel Demineralized Water Station

Project Background: The demineralized water station supplies pure production water for steel mill boilers and steelmaking processes, acting as a vital auxiliary system for power generation and production, which requires uninterrupted long-term operation of the control system.

Systemkonfiguration: Distributed architecture of S7-400 main station + ET200M slave stations is deployed. The main rack uses 6ES7407-0KA02-0AA0 power supply modules to uniformly power CPUs and I/O modules, covering signal acquisition and pump & valve control across full pretreatment, reverse osmosis and mixed bed processes.

Anwendungswert: The built-in ≥20 ms mains hold-up capacity resists voltage drops triggered by startup of high-power plant motors. Combined with backup lithium batteries to retain process parameters upon power loss, no water quality standard-exceeding incidents caused by power supply faults have happened since commissioning.

Typical Applications in Chemical & Petrochemische Industrie

1. HDPE Extrusion Pelletizing Unit

Project Background: The extrusion pelletizing unit of a 300,000 tons/year HDPE plant serves as core continuous production equipment. Unexpected shutdown leads to pipeline material blockage and equipment damage, with losses exceeding millions RMB per outage, requiring stringent power supply reliability.

Systemkonfiguration: Siemens S7-400H redundant PLC system is equipped with 2 pcs of 6ES7407-0KA02-0AA0 power supply modules to form a redundant power circuit, matched with redundant CPU 414-4H to implement full closed-loop regulation and safety interlock protection for mixer, melt pump and pelletizer in terms of rotating speed, Temperatur und Druck.

Anwendungswert: Overcurrent protection and electromagnetic shielding design of the power module resist complex electromagnetic interference in chemical workshops. The redundant configuration enables bumpless system switching upon single module failure. No unplanned shutdowns due to power supply faults have occurred since unit commissioning, reducing annual shutdown losses by over ten million RMB.

2. DCS Control System for Sulfur-burning Sulfuric Acid Plant

Project Background: Sulfur-burning sulfuric acid processes involve high-temperature and highly corrosive media. Power failure of the control system results in runaway reactions with severe safety risks, hence the power supply system must meet the highest safety standard requirements.

Systemkonfiguration: The main rack of S7-414H redundant controllers is fitted with 2 redundant 6ES7407-0KA02-0AA0 power supply modules, matched with CP443-1 industrial Ethernet modules and 3 sets of downstream ET200M remote I/O stations, covering monitoring and emergency interlock control for full sulfur combustion, conversion and dry absorption process sections.

Anwendungswert: The module’s wide-temperature design adapts to high-temperature plant operating environments. Built-in fault diagnosis provides early warning of hidden hazards such as low battery voltage and abnormal output. System power supply availability hits 99.99%, fully satisfying safe production requirements of chemical plants.

Typical Application in Building Materials Industry: Automatic Control System of Sleeve Lime Kiln

Project Background: Lime kilns adopt continuous thermal production processes. Unexpected power cut leads to sintered scrapped materials and damaged refractory linings inside the kiln, with recovery periods lasting several days and heavy economic losses.

Systemkonfiguration: S7-400 series PLC acts as the control core. The main rack is powered by 6ES7407-0KA02-0AA0 modules paired with CPU 414-2XK05 controllers to realize full automatic control of material feeding, combustion and ash discharging, while real-time collecting hundreds of process parameters of temperature, pressure and material level.

Anwendungswert: The module’s mains hold-up capacity withstands transient mains voltage sags in the plant, and backup lithium batteries retain data during power failure. It effectively avoids system shutdown and loss of process parameters induced by voltage dips, significantly improving kiln operational stability and lifting qualified finished lime rate by over 2%.

Typical Application in Power & Energiewirtschaft: Messung & Control System for Gobi Intelligent Substation

Project Background: Substations in gobi areas operate under harsh environments featuring large day-night temperature differences, frequent mains fluctuations and heavy sand dust. Unattended operation imposes extremely high requirements on environmental adaptability and reliability of power supply modules.

Systemkonfiguration: Alle 32 sets of S7-400 measurement & control units across the whole station adopt 6ES7407-0KA02-0AA0 power supply modules, responsible for status acquisition and remote control of circuit breakers & Trennschalter, as well as real-time monitoring of electrical parameters including busbar voltage and line current.

Anwendungswert: The module’s 85~264 V AC wide input voltage accommodates mains fluctuations in remote areas, wide operating temperature range covers extreme temperature differences, and dustproof anti-interference design adapts to gobi sand-dust environments. Zero power supply faults were recorded over a measured continuous operation period of 18,000 Std., supporting stable unattended operation of substations.

General High-Reliability Scenario: Standard Configuration for S7-400H Redundant Systems

For all zero-downtime high-availability scenarios such as pharmaceutical manufacturing, rail transit and municipal water supply, 6ES7407-0KA02-0AA0 serves as the standard power supply configuration for S7-400H redundant systems. A dual-module 1:1 redundant scheme is commonly adopted, with modules mounted on left and right sides of UR2-H redundant racks to supply power to the backplane bus simultaneously. When any single module fails, the other automatically bears full load with disturbance-free switching that does not impact system operation, making it the standard power supply solution for industrial redundant control systems.

Ergänzende Anmerkung: 6ES7407-0KA02-0AA0 is an upgraded replacement model for the old 6ES7407-0KA01-0AA0. It features fully compatible mechanical mounting dimensions and electrical interfaces, allowing direct replacement and upgrade for all earlier projects deployed with 0KA01 modules.

Übersetzungshinweise

1. Industry standard terminology strictly follows Siemens official English documentation;
2. Electrical parameter abbreviations (Wechselstrom, Gleichstrom, V, A, W, MS, ℃, Ah) retain international universal