Product Core Brief
- Model: K9203A
- Brand: HIMA
- Series: HIMax
- Core Function: Delivers high-volume redundant cooling for 19-inch safety control racks.
- Product Type: Rack Fan Module
- Key Specs: 24 VDC | 300 m³/h | Triple Axial Fans
- Condition: New Original (New Surplus)
Product Introduction
The HIMA is a high-performance 3-axial rack fan module engineered to cool 19-inch safety control cabinets. It ensures critical electronic components remain within safe thermal limits under harsh industrial conditions.
Unlike single-fan assemblies, this unit utilizes three independent axial fans and a redundant power supply. It delivers a massive 300 m³/h airflow while actively monitoring voltage and fan speed to prevent thermal runaway in high-availability systems.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Fan Configuration | 3 independent axial fans |
| Total Airflow | 300 m³/h (approx. 240 CFM) |
| Nominal Voltage | 24 VDC |
| Mounting Format | 19-inch rack compatible |
| Redundancy | Built-in redundant power supply |
| Diagnostics | Fan run monitoring & voltage check |
| Form Factor | Wall-mount / Rack-mountable |
| Dimensions | 48.3 x 20.3 x 4.5 cm |
| Weight | 0.5 kg |
| Operating Environment | Industrial (ruggedized design) |
HIMA K9203A 996920360
Quality Control Process (Engineer’s Perspective)
We don’t just box these and ship them. Here is our actual bench test workflow.
- Incoming Verification: We verify the serial number against HIMA’s traceability records. A visual inspection checks for bent fan blades and ensures the mounting brackets aren’t warped.
- Live Functional Test: We apply 24 VDC and verify all three axial fans spin up smoothly. We use an anemometer to confirm the combined airflow meets the 300 m³/h spec.
- Electrical Parameter Test: We measure the total current draw with a Fluke 115 to ensure the redundant power circuits share the load correctly. Ground continuity is verified.
- Firmware Verification: N/A for passive fan modules. We photograph the label and connector pinout to ensure no manufacturing date anomalies exist.
- Final QC & Packaging: The module is sealed in an anti-static bag with silica gel. A QC sticker showing the test date and technician initials is applied to the exterior.
Replacement Pitfall Guide
Field replacements on safety systems are unforgiving. Watch out for these traps.
- Firmware Mismatch: ❗ Critical. While this is a mechanical module, the HIMax CPU monitors its feedback signals. If your system expects specific RPM thresholds, verify the matches your configuration matrix.
- DIP Switch / Jumper Misconfiguration: This module has no user-adjustable switches. However, ensure you aren’t confusing it with the K9202B cabinet fan; they have different form factors and airflow capacities.
- Terminal / Cable Incompatibility: Inspect the 24 VDC power connector before plugging in the new card. Corroded pins or loose crimps are common failure points that mimic fan motor failure.
- Power Supply Mismatch: Verify your 24 VDC field power supply has at least 20% headroom. Three fans starting simultaneously can cause an inrush current spike that might trip an undersized power supply.
- ESD Damage: Safety modules are highly sensitive to electrostatic discharge. Always wear a grounded wrist strap when handling the bare PCB. I’ve seen modules fail bench testing because they were handled on a dry winter day without protection.
Keep these in mind and you’ll cut 90% of rework time.
HIMA K9203A 996920360
Compatibility Matrix & Benchmarks
Compatibility
- HIMA K9203 → : Direct Replacement — Verify mounting hole alignment.
- HIMA K9202B → : Needs Adaptation — Different form factor and airflow rating.
Benchmarks
- Total Airflow Volume: 300 m³/h (free air, no backpressure)
- Start-up Time: < 2 s (at 24 VDC nominal)
Need the exact cutout dimensions for mounting the into your existing 19-inch rack? I can pull up the mechanical drawing for you.
