Siemens 6FC5348-0AA02-0AA0 SINUMERIK/SIMOTION Double Fan and Battery Module
01Overview
Siemens 6FC5348-0AA02-0AA0 is the double fan and battery module for compatible SINUMERIK NCU 7x0 and SIMOTION D445-1/D4x5-2 control units. The module includes a buffer battery. Siemens documentation identifies it as the required fan/battery type for D4x5-2 cooling, with temperature-controlled fan operation and diagnostic indication if both fans fail. The double-fan design must not be confused with the small-fan 6FC5348-0AA01-0AA0 article.
02Specs
| Manufacturer | Siemens |
|---|---|
| Article Number | 6FC5348-0AA02-0AA0 |
| Product Family | SINUMERIK / SIMOTION |
| Product Type | Double fan and battery module |
| Fan Arrangement | Twin fan |
| Battery | Buffer battery included |
| SINUMERIK Compatibility | NCU 7x0 |
| SIMOTION Compatibility | D445-1 / D4x5-2 |
| Fan Control | Temperature-controlled on D4x5-2 |
| Maximum Permissible Supply-Air Temperature | 55 degrees C on D4x5-2 |
| Fan-Failure Indication | RDY LED red/yellow flashing at 2 Hz when both fans fail |
| Lifecycle Status | Cancelled since October 2025; spare part |
03Features
Key Functions
- Twin fans provide the double-fan arrangement specified for supported control units.
- The module combines cooling hardware with a supplied buffer battery.
- Siemens identifies it for NCU 7x0 and for D445-1/D4x5-2 control units.
- On D4x5-2, fan operation is controlled according to supply-air temperature and CPU load.
- A dual-fan failure is reported through diagnostics and a red/yellow 2 Hz RDY indication on the documented D4x5-2 system.
Product Identity
- Manufacturer: Siemens
- Model: 6FC5348-0AA02-0AA0
- Product Type: Double-fan cooling and buffer-battery module
- Status: Cancelled since October 2025; spare part
04Applications
- Required cooling module for supported SIMOTION D4x5-2 control units.
- Spare-part replacement on compatible SINUMERIK NCU 7x0 hardware.
- Cooling and battery service for supported D445-1 installations.
- Preventive replacement where fan diagnostics or battery maintenance indicate service need.
- Restoration of the original twin-fan cooling concept after a module fault.
- Lifecycle stocking for machines that use the exact double-fan module.
05Lifecycle
- Siemens records product cancellation from October 2025 and identifies the module as a spare part.
- Confirm the complete control-unit article and the required single- or double-fan design before ordering.
- The small-fan 6FC5348-0AA01-0AA0 is not an assumed equivalent.
- Follow the equipment instructions for isolation, battery handling, fan-module removal and airflow clearance.
- After replacement, verify both fans, RDY indication, diagnostic buffer, temperature response and battery status.
06FAQ
What is Siemens 6FC5348-0AA02-0AA0?
It is a double fan and buffer-battery module for compatible SINUMERIK NCU 7x0 and SIMOTION D445-1/D4x5-2 control units.
Is the battery supplied with the module?
Yes. Siemens identifies the product as including a buffer battery.
Is it the same as 6FC5348-0AA01-0AA0?
No. This article is the double-fan version; 6FC5348-0AA01-0AA0 is the small-fan module.
How are the fans controlled on D4x5-2?
Siemens documents temperature-controlled switching based on supply-air temperature and CPU load.
How is a double fan failure indicated?
The documented D4x5-2 behavior includes a diagnostic entry and a red/yellow RDY LED flashing at 2 Hz when both fans fail.
What should be checked after installation?
Verify both fans, airflow, battery status, RDY indication, diagnostics and the control-unit temperature response.
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