I. Basic Information

Model: K9203A (Order Number: 996920360)

Brand: HIMA (Germany)

Type: T4 Rack Cooling Fan Module (3 Axial Fans)

Replacement Model: Fully replaces K9203 (996920302), compatible and interchangeable

Compatible Systems: HIMax, H41q/H51q (HIQuad X), F3/F35 Safety Controller Cabinets

Installation: 19-inch standard rack, 1U (44mm) height

Protection Class: IP20 (for use inside cabinets)

Operating Temperature: -20°C to +70°C; Storage Temperature: -40°C to +70°C

Weight: Approximately 1.8 to 2.0 kg

Dimensions: 483mm × 44mm × 215mm (Width × Height × Depth)

II. Core Parameters

Power Supply: 24VDC (20.4~28.8VDC, dual redundant input)

Fan Configuration: 3 parallel redundant axial fans

Airflow: 350m³/h (≈206CFM) (17% increase compared to K9203)

Speed: 2800RPM ± 10%

Noise: ≤42dB(A) (3dB reduction compared to K9203)

Current: ≤0.6A per module (full load)

Monitoring: Independent fan operation monitoring + voltage monitoring + fault dry contact alarm

Redundancy: Dual power supply + three fans without single point of failure, meeting SIL3 cooling redundancy

MTBF: >120,000 hours (25℃)

Hot Swap: Supports online hot swap replacement (requires redundant power supply online)

III. Interface and Terminal Definitions

Table

Interface / Terminal Type Function

L+1/L- Power 1 Main 24VDC positive / negative (redundant 1)

L+2/L- Power 2 Standby 24VDC positive / negative (redundant 2)

ALARM Dry contact Fault alarm (normally open / normally closed, ≤30V/1A)

LED Status Power green, running green flashing, fault red

IV. Key Upgrades (Compared to K9203)

Stronger cooling: Airflow 350m³/h (K9203 is 300m³/h), better cooling in high-temperature environments.

Lower noise: ≤42dB (A) (K9203 is 45dB (A)), quieter operation in cabinets.

Hot swap support: Modules can be replaced without downtime, improving maintenance efficiency.

Longer lifespan: MTBF increased to 120,000 hours, more reliable for long-term operation.

Compatibility and interchangeability: Pin and installation dimensions are exactly the same, direct replacement of K9203 without rewiring.

V. Installation and Wiring

Installation: 1U position in 19-inch rack, with ≥50mm clearance for heat dissipation at top and bottom; install at the bottom or middle of the cabinet, with air flowing in from the front and out from the back.

Power Wiring:

Dual redundant input: L+1/L- for main power, L+2/L- for standby power, independent grounding.

Wire gauge ≥2.5mm², shield single-ended grounding, torque ≥0.8N・m.

Alarm Wiring: Connect ALARM dry contact to system DI, triggering SIS alarm upon fault.

VI. Commissioning and Maintenance

Power-on: Dual power supply LEDs are constantly on, running LED flashes, no red light, and three fans operate evenly.

Maintenance: Dust removal, check fan speed / LED / alarm circuit every 6 months; supports hot swap replacement of faulty modules.

Troubleshooting:

Single fan red: Fan failure → hot swap replacement;

Dual power supply alarm: Voltage abnormality → check redundant power supply;

No airflow: Fan jammed → power off to clear debris or replace module.

VII. Typical Applications

Petrochemical / Chemical: SIS/ESD cabinet cooling, ensuring stable CPU/I/O operation at high temperatures;

Oil and Gas / Power: Forced air cooling for HIMA safety controllers (F35/HIMax) cabinets;

Compatibility: Suitable for 19-inch HIMA safety system cabinets requiring SIL3 redundant cooling.