Product Specifications
Brand: Siemens
Part Number: 6ES7405-0KR02-0AA0
Product Type: S7-400 Backplane Power Supply (Redundant)
Series: SIMATIC S7-400 PS 405
Input Voltage: 24/48/60 V DC (19.2–72 V DC range)
Output: 5 V DC / 10 A; 24 V DC / 1 A
Power Consumption: 95 W (typical)
Slots Required: 2 (50 mm wide)
Dimensions (W×H×D): 50 × 290 × 217 mm
Weight: Approx. 1,200 g
Product Description
The Siemens 6ES7405-0KR02-0AA0 is a redundant-capable PS 405 DC-input power supply for the SIMATIC S7-400 PLC platform. It delivers 10 A at 5 V DC and 1 A at 24 V DC to the backplane bus and supports dual-redundant operation — two units installed in slots 1 and 3 provide fail-safe power with automatic switchover.
Key Features
- Supports dual-redundant operation — install paired units in slots 1 and 3 for fail-safe power
- Accepts 24/48/60 V DC input with a wide 19.2–72 V DC tolerance range
- Delivers 10 A at 5 V DC for backplane bus and 1 A at 24 V DC for auxiliary circuits
- 20 ms mains buffering bridges short power interruptions without CPU reset
- Galvanic isolation between primary and secondary sides for signal integrity
- Short-circuit-proof and idling-proof 24 V output
- Supports optional backup battery (1× or 2× lithium AA, 3.6 V) for CPU data retention
- ATEX, IECEx, CE, UL, and UKCA certified for global deployment
Technical Data
| Parameter | Value |
|---|---|
| Input Voltage | 24/48/60 V DC (19.2–72 V DC) |
| 5 V DC Output Current | 10 A (max) |
| 24 V DC Output Current | 1 A (max) |
| Typical Power Consumption | 95 W |
| Typical Power Loss | 20 W |
| Mains Buffering | ≥20 ms |
| Redundant Operation | Yes — dual units in slots 1+3 |
| Slots Required | 2 (50 mm wide) |
| Dimensions (W×H×D) | 50 × 290 × 217 mm |
| Weight | Approx. 1,200 g |
| Operating Temperature | 0 °C to +60 °C |
| Certifications | CE, UL, ATEX, IECEx, UKCA, CCC, KC, RCM |
Applications
The PS 405 10 A Redundant variant is designed for high-availability S7-400 PLC installations where power continuity is critical — process plants, chemical facilities, power generation, and any application where a power supply failure must not bring the PLC offline. Two KR02 units installed in slots 1 and 3 provide seamless fail-over. For non-redundant applications, the 6ES7405-0KA02 offers the same 10 A output in a single-unit configuration.
Siemens 6ES7405-0KR02 S7-400 PS 405 Power Supply, 10A 5VDC Redundant, 24/48/60V DC Input
Product Specifications
Brand: Siemens
Part Number: 6ES7405-0KR02-0AA0
Product Type: S7-400 Backplane Power Supply (Redundant)
Series: SIMATIC S7-400 PS 405
Input Voltage: 24/48/60 V DC (19.2–72 V DC range)
Output: 5 V DC / 10 A; 24 V DC / 1 A
Power Consumption: 95 W (typical)
Slots Required: 2 (50 mm wide)
Dimensions (W×H×D): 50 × 290 × 217 mm
Weight: Approx. 1,200 g