Product Overview
Technical Summary
| Product designation | SIMATIC S7-400 PS405 power supply, 20 A |
|---|---|
| Input voltage | 24 V DC, 48 V DC, 60 V DC |
| Output voltage | 5 V DC |
| Backplane bus output current, max. | 20 A; no base load required |
| 24 V DC backplane bus output current, max. | 1 A; idling-proof |
| Rated input current | 7 A at 24 V DC; 3.2 A at 48 V DC; 2.5 A at 60 V DC |
| Required slots | 2 |
| Mains/voltage failure stored energy time | 20 ms |
| Short-circuit protection | Yes |
| Potential separation | Primary/secondary |
| Power loss, typ. | 44 W |
| Product lifecycle | Active Product |
Key Features
- Product designation: SIMATIC S7-400 PS405 power supply, 20 A, wide range, with 24/48/60 V DC input and 5 V DC/20 A output.
- Rated input values: Rated input values are 24 V DC, 48 V DC, and 60 V DC.
- Output current: Backplane bus output current is maximum 20 A at 5 V DC; 24 V DC backplane bus output current is maximum 1 A and idling-proof.
- Input current: Rated input current is 7 A at 24 V DC, 3.2 A at 48 V DC, and 2.5 A at 60 V DC.
- Protection and separation: Short-circuit protection, primary/secondary potential separation, overvoltage category II, and equipment protection class I with protective conductor.
- Installation and buffering: The power supply requires 2 slots and provides 20 ms mains/voltage failure stored energy time; mains buffering follows NAMUR recommendation.
Frequently Asked Questions
What product does Siemens order number 6ES7405-0RA02-0AA0 identify?
It identifies a SIMATIC S7-400 PS405 power supply with 24/48/60 V DC input and 5 V DC/20 A output.
What installation detail distinguishes this power supply?
The power supply requires 2 slots.
Is the backup battery included with this configuration?
The backup battery is optional: 2x lithium AA, 3.6 V / 2.2 Ah.
