SIEMENS 6ES7407-0KR00-0AA0 20A Regulated Power Supply – SIMATIC S7-400 PS407 Series
When a SIMATIC S7-400 system loses its power supply, the consequences extend far beyond a simple shutdown. Entire production lines halt, safety interlocks may fail to execute correctly, and uncontrolled process states can result in equipment damage, material loss, or personnel risk. In high-availability industrial environments — from automotive body shops to chemical batch reactors — the power supply is the heartbeat of the control system. Without a reliable, specification-matched PSU, every other component in the rack is rendered inoperable.
The SIEMENS 6ES7407-0KR00-0AA0 is the 20 A variant of the PS407 power supply family, engineered specifically for the SIMATIC S7-400 programmable logic controller platform. Within the PS407 lineup, this model occupies the high-current tier, making it the preferred choice for fully populated S7-400 racks with multiple I/O modules, communication processors, and function modules drawing simultaneous load. Globally, the S7-400 series remains one of the most widely deployed high-end PLC platforms in process and manufacturing automation, and the PS407 20A is a cornerstone component sustaining those installations.
Technical Specifications
- Part Number: 6ES7407-0KR00-0AA0
- Series: SIMATIC S7-400, PS407
- Output Current: 20 A (DC 5 V bus)
- Input Voltage: AC 120/230 V (wide-range auto-select) or DC 110/220 V
- Output Voltage: DC 5 V (regulated) + DC 24 V (auxiliary)
- Redundancy Support: Yes — supports parallel redundant PSU configuration
- Mounting: S7-400 rack, slot 1 (leftmost power supply slot)
- Dimensions (W×H×D): 50 mm × 290 mm × 210 mm (approx.)
- Weight: Approx. 700 g
- Protection Class: IP20
- Operating Temperature: 0 °C to +60 °C
- Standards: CE, UL, cUL, FM (refer to official SIEMENS datasheet for full certification list)
Note: All specifications are sourced from publicly available SIEMENS documentation. Konmask.com does not fabricate or alter manufacturer data. Always verify against the official SIEMENS product datasheet before engineering use.
Key Features & Benefits
- 20 A Output Capacity: Supports fully loaded S7-400 racks with multiple high-draw modules without voltage droop or thermal throttling.
- Wide-Range AC/DC Input: Auto-selects between 120 V and 230 V AC, and accepts DC 110/220 V — ideal for global deployments and sites with unstable grid supply.
- Redundancy-Ready Architecture: Two PS407 20A units can be operated in parallel for N+1 redundancy, eliminating the PSU as a single point of failure in critical processes.
- Integrated Diagnostics: Status LEDs and INTF/EXTF fault signaling allow rapid fault isolation without removing the module from the rack.
- Hot-Swap Compatible: Designed for replacement under live rack conditions (follow SIEMENS safety procedures), minimizing planned downtime windows.
- Long Service Life: Industrial-grade capacitors and thermal management designed for continuous 24/7 operation in demanding environments.
Industry & Equipment Applications
- Oil & Gas: Compressor control panels, pipeline SCADA RTU cabinets, and wellhead automation systems requiring uninterrupted 5 V bus power.
- Automotive Manufacturing: Body-in-white welding lines, paint shop conveyors, and press transfer systems with fully populated S7-400 racks.
- Chemical & Pharmaceutical: Batch reactor control, clean-in-place (CIP) systems, and FDA-regulated process lines where PSU redundancy is a validation requirement.
- Power Generation & Utilities: Turbine control systems, substation automation, and water treatment SCADA where grid voltage may vary.
- Steel & Metals: Rolling mill drives, furnace temperature control, and continuous casting line PLCs with high module counts.
- Pulp & Paper: DCS-integrated S7-400 nodes in digester and bleaching plant control rooms.
System Integration & Compatible Parts
The 6ES7407-0KR00-0AA0 is designed to operate within the SIMATIC S7-400 ecosystem. Compatible and commonly paired components include:
- Racks: UR1 (6ES7400-1JA01-0AA0), UR2 (6ES7400-2JA00-0AA0), ER1, ER2 expansion racks
- CPUs: S7-400 CPU family — CPU 412, CPU 414, CPU 416, CPU 417 series
- Redundant PSU Pairing: A second 6ES7407-0KR00-0AA0 for N+1 redundancy configurations
- Lower-Current Alternatives: 6ES7407-0DA02-0AA0 (4 A), 6ES7407-0KA02-0AA0 (10 A) for lighter rack loads
- Communication Processors: CP 443-1, CP 443-5 for PROFIBUS/PROFINET integration
If you are unsure which PSU rating matches your rack’s total current draw, contact our technical team with your rack configuration and we will advise accordingly.
Our Quality Assurance Process
At Konmask.com, every unit of the 6ES7407-0KR00-0AA0 we supply undergoes a structured verification process before dispatch:
- Source Verification: Units are sourced from authorized distributors or verified surplus channels with documented provenance.
- Visual & Physical Inspection: Housing integrity, connector condition, label authenticity, and firmware version checks.
- Functional Pre-Test: Where applicable, output voltage and current regulation are verified on a test bench prior to packaging.
- Secure Packaging: Anti-static packaging with foam cushioning and humidity indicators for international shipment.
- Documentation: Each shipment includes a packing list, inspection record, and available certificates of conformity.
How to Order
- Submit an inquiry via the “Request a Quote” button on this page, or email support@konmask.com directly.
- Provide your required quantity, delivery destination, and any urgency requirements.
- Our team will respond within 1 business day with availability, lead time, and a formal quotation.
- Upon order confirmation, we arrange export documentation, freight, and customs clearance support as needed.
We support T/T bank transfer, L/C, and other B2B payment terms. MOQ is 1 piece.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, and automation hardware — not a generalist electronics distributor.
- Global Export Experience: We ship to 60+ countries with full export documentation, including commercial invoices, packing lists, and certificates of origin.
- Technical Pre-Sales Support: Our engineers can assist with compatibility checks, rack current budgeting, and spare parts planning.
- Competitive Lead Times: Extensive supplier network enables fast sourcing even for discontinued or long lead-time SIEMENS parts.
- Transparent Communication: No hidden fees. Clear quotations, honest lead times, and proactive shipment tracking updates.
Frequently Asked Questions
- Q: Is the 6ES7407-0KR00-0AA0 still in production by SIEMENS?
- A: This model may be classified as discontinued or phased out by SIEMENS. Konmask.com specializes in sourcing legacy and surplus automation components. Contact us to confirm current stock availability.
- Q: Can I use two PS407 20A units in the same rack for redundancy?
- A: Yes. The S7-400 rack supports dual PSU slots (slots 1 and 2 on UR1/UR2 racks), allowing two PS407 units to operate in parallel for N+1 redundancy. Both units must be the same model and output rating.
- Q: What is the difference between 6ES7407-0KR00-0AA0 and 6ES7407-0KA02-0AA0?
- A: The 0KR00 variant provides 20 A output on the 5 V DC bus, while the 0KA02 provides 10 A. The 20 A version is required for fully populated racks or those with high-current function modules.
- Q: Do you provide a warranty on this part?
- A: Yes. We offer a standard 90-day warranty against defects in material and workmanship. Extended warranty terms are available — please discuss at the time of quotation.
- Q: Can you supply the SIEMENS manual or datasheet for this part?
- A: Publicly available SIEMENS documentation can be shared upon request. Official manuals are the property of SIEMENS AG and are referenced, not reproduced, by Konmask.com.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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