Description
Product Overview
K9203 is a rack-mounted fan drawer assembly for HIMA HIMax safety instrumented system (SIS) chassis. It supplies forced convection cooling for HIMax rack CPU, I/O and communication modules, maintaining stable operating temperature for SIL3 safety control hardware. The unit is a hot-swappable plug-in fan tray with built-in fan fault monitoring and alarm output. HIMA continues support for this spare for existing HIMax installations.
Technical Specifications
| Item | Parameter |
|---|---|
| Manufacturer | HIMA Paul Hildebrandt (Germany) |
| Part Number | K9203, Order Code:996920302 |
| Product Type | Rack Fan Drawer / Cooling Fan Unit |
| System Platform | HIMA HIMax SIS Safety System |
| Power Supply | 24 VDC (18–30 VDC operating range) |
| Mounting | 19-inch rack plug-in drawer |
| Airflow | 300 m³/h nominal |
| Fan Speed | 2800 rpm |
| Alarm Output | Relay contact for fan failure / loss of speed alarm |
| Material | Anodized aluminum housing |
| Operating Temperature | -25 °C ~ +60 °C |
| Humidity | 5%–95% RH, non-condensing |
| Enclosure Rating | IP20 (inside control cabinet) |
| Net Weight | Approx.1.8 kg |
Key Features
- Hot Swap Capability: Can be replaced while the HIMax rack remains online, no full system shutdown required for fan tray maintenance.
- Fan Fault Diagnostics: Built-in speed monitoring circuit. Triggers dry contact alarm if any fan stalls or fails.
- Integrated Airflow Design: Optimized air direction to cool all horizontal card slots in HIMax chassis.
- SIL System Compatibility: Designed for safety-related SIS racks; cooling failure alarm is integrated into the HIMax diagnostic logic.
- Rugged Industrial Construction: Aluminum drawer resists vibration and dust common in power, oil & gas control rooms.
- Front LED Status Indication: Visual LED for normal operation and fault status for quick local troubleshooting.
- Dedicated HIMax Spare: Purpose-built for HIMax racks; cannot be used for HIMA F30/F35 legacy systems.
Applications
- Power plant SIS / BMS HIMax safety racks
- Petrochemical emergency shutdown (ESD) cabinets
- Oil & gas pipeline safety instrumented systems
- Chemical plant fire and gas control panels
- Refinery critical safety control room racks
Installation & Maintenance Notes
- ESD protection is required during handling and replacement.
- Execute lockout-tagout on fan drawer 24VDC supply before removing, even though SIS rack can stay running.
- Check fan alarm wiring and dry-contact signal connection after replacement, confirm fault alarm function.
- Inspect fans and dust filters periodically; accumulated dust reduces airflow and triggers over-temperature risks for safety cards.
- Confirm full part number K9203 (996920302) match when ordering spare drawer.
- Test fan alarm logic in HIMax engineering tool after commissioning replacement unit.
FAQ
Q: Can K9203 be swapped while the HIMax safety rack stays online? A: Yes, it is hot-swappable. The safety controller and I/O modules keep running during fan tray replacement.
Q: What happens if one fan inside K9203 fails? A: The onboard monitoring circuit activates the relay alarm signal to HIMax, alerting operators before overheating occurs.
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