Siemens 6ES7405-0KA02-0AA0 Power Supply
Warranty: 1 year
Condition : brand new in factory sealed box
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Detail
- Product NameSiemens 6ES7405-0KA02-0AA0 Power Supply
- Item NO.3487990
- Weight1.2000 kg = 2.6455 lb = 42.3288 oz
- CategoryPLC
- BrandSiemens
- Creation Time2025-12-15
- Siemens Power Supply
6ES7405-0KA02-0AA0
Product Profile
6ES7405-0KA02-0AA0 is a PS405 wide-range DC power supply module from Siemens' SIMATIC S7-400 PLC system. It provides reliable power to the S7-400 backplane bus with an input voltage range of 24/48/60 V DC (19.2–72 V DC) and delivers 5 V DC / 10 A for CPU and I/O modules, plus 24 V DC / 1 A for auxiliary loads.
The PS405 is the DC-input counterpart to the AC-input PS407 (6ES7407-0KA02-0AA0), making it ideal for applications where a DC supply is already available in the control cabinet, such as battery-backed substations, marine applications, and DC-grid industrial plants.
The module features a battery backup slot (AA lithium, 3.6 V / 2.2 Ah) for memory retention during power outages, occupies 2 slots in the rack with a width of 50 mm, and remains in active product lifecycle status (PM300).
- Siemens SIMATIC S7-400 Series
- PS405 DC Power Supply
- 5 V DC / 10 A output
- Input: 19.2–72 V DC
- PM300: Active Product
Technical Data
Electrical specifications
| Manufacturer | Siemens |
| Model | 6ES7405-0KA02-0AA0 |
| Product type | PS405 Power Supply Module |
| Series | SIMATIC S7-400 |
| Input voltage (DC rated) | 24 / 48 / 60 V DC |
| Input voltage (DC range) | 19.2 – 72 V DC |
| Input current @ 24 V DC | 4 A |
| Input current @ 48 V DC | 2 A |
| Input current @ 60 V DC | 1.6 A |
| Inrush current (max) | 18 A (half-width 20 ms) |
| Power buffer time | ≥ 20 ms (NAMUR compliant) |
| Output 5 V DC (max) | 10 A (no basic load required) |
| Output 24 V DC (max) | 1 A (short-circuit proof) |
| Active power input (typ.) | 95 W |
| Power loss (typ.) | 20 W |
| Short-circuit protection | Yes |
| Galvanic isolation | Primary/secondary |
Physical & environmental
| Rack slot requirement | 2 slots |
| Protection rating | IP20 |
| Operating temperature | 0°C to +60°C |
| Storage temperature | –40°C to +85°C |
| Battery backup | Optional; 2x AA lithium (3.6 V / 2.2 Ah) |
| Overvoltage category | II |
| Equipment protection class | I (with protective conductor) |
| Certifications | CE, UL, CSA, FM, ATEX, IECEx, ABS, BV, DNV, LR, NK, CCS |
System Role
The 6ES7405-0KA02-0AA0 functions as the primary power source for the S7-400 backplane bus in DC-supplied industrial environments. It converts a DC voltage (24/48/60 V) from the plant's battery or DC grid into the stable 5 V DC supply required by S7-400 CPUs, communication processors, and I/O modules.
Unlike the AC-input PS407, the PS405 is specifically designed for applications where DC power is already available, eliminating the need for an AC-to-DC conversion stage. This makes it particularly suitable for substation automation, marine applications, offshore platforms, and industrial plants with DC power distribution.
The module provides a separate 24 V DC / 1 A auxiliary output for powering external loads, such as sensors, relays, or indicators, further reducing the need for additional power supplies.
- S7-400 central rack supply
- DC-input version of PS407
- Battery-backed DC grid systems
- Expansion rack power via interface modules
- ATEX Zone 2 hazardous areas
Compatibility
The 6ES7405-0KA02-0AA0 is designed for seamless integration into SIMATIC S7-400 systems.
Compatible components
| System | SIMATIC S7-400 |
| Rack compatibility | All S7-400 racks (UR1, UR2, CR2, ER1, ER2) |
| Slot requirement | 2 slots (max 3 slots with battery) |
| Compatible CPUs | S7-400 CPU 412, 414, 416, 417 series |
| Redundant version | 6ES7405-0KR02-0AA0 (PS405 10A R) |
| AC input equivalent | 6ES7407-0KA02-0AA0 (PS407 10A) |
| Battery type | 2x AA lithium, 3.6 V / 2.2 Ah |
| Battery holder | 6ES7971-1AA00-0AA0 (optional) |
- The PS405 is not compatible with third-party power supplies due to the unique 5 V backplane bus specification.
- The redundant version (PS405 10A R) enables two power supplies to feed the same rack for high-availability applications.
- This PS405 10A (0KA02) supersedes the earlier 0KA01 version.
- ATEX certification allows use in hazardous areas (Zone 2).
Applications
The PS405 power supply is deployed in SIMATIC S7-400 based automation systems where DC power is available.
FAQ – Frequently Asked Questions
PS405 (6ES7405-0KA02-0AA0) accepts DC input (24/48/60 V), while PS407 (6ES7407-0KA02-0AA0) accepts AC input (85-264 V).
Yes, this module is classified as PM300 (Active Product) and remains in active production and support.
0KR02 is the redundant version (PS405 10A R), enabling two power supplies to feed the same rack for high-availability applications.
It provides 5 V DC / 10 A for the S7-400 backplane bus and 24 V DC / 1 A for auxiliary loads.
The battery is optional and must be ordered separately. It uses 2x AA lithium batteries (3.6 V / 2.2 Ah).
Yes, the PS405 carries ATEX, IECEx, and FM approvals for use in hazardous areas (Zone 2).
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