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Phone: +86 16626708626Description
Key Technical Specifications
- Manufacturer: HIMA
- Part Number: K9203 (996920302)
- Product Family: HIMA 19″ rack cooling accessories
- Module Type: Circulation fan unit (fan drawer)
- Nominal Supply Voltage: 24 V DC (typical operating range: −15% to +20%)
- Maximum Current: Approx. 750 mA
- Fan Configuration: 3 axial fans in a single 19″, 1U drawer
- Airflow: Approx. 300 m³/h (≈ 176 CFM)
- Noise Level: Approx. 55 dB(A)
- Rated Speed: Approx. 2,800 min⁻¹ (rpm)
- Mounting: 19″ rack, 1 RU height, depth approx. 215 mm
- Ambient Temperature: Typically −20 to +70 °C (verify against OEM datasheet for your exact revision)
- Expected Lifetime: Approx. 62,500 h at 40 °C (fan bearings)
- Monitoring: Fan run monitoring; fault relay contacts for alarm signaling
Note: Exact terminal numbers, relay ratings, and mechanical dimensions can vary by revision. Always confirm against the official HIMA K9203/K9203A data sheet and your rack layout before installation.
Product Introduction
The HIMA K9203 (996920302) is a 19-inch, 1U rack-mounted circulation fan module used to provide forced-air cooling for HIMA safety and automation racks (HIQuad, HIMax, H41q/H51q, and related 19″ systems). It houses three axial fans in a single drawer and moves air from bottom to top to keep CPUs, I/O, and power modules within their rated temperature range.
This unit is specified where thermal management directly impacts availability: refineries, oil & gas, power generation, and other continuous-process sites running HIMA SIS/ESD platforms. Buyers choose K9203 modules to maintain or expand existing HIMA rack cooling without redesigning the cabinet layout, preserving the original airflow pattern and alarm integration.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Fans not running, no airflow | 24 V DC supply lost; fuse blown; wiring loose | ✅ High | Measure 24 V DC at fan module terminals (L1+/L−); check upstream fuses and PSU | Restore 24 V DC and retest; if voltage is good but fans stay off, suspect fan unit |
| One or two fans silent, others running | Individual fan failure; bearing wear; obstruction | ✅ High | Visually inspect all three fans while powered; listen/feel for airflow per fan section | Replace the K9203 drawer; individual fan repair inside the drawer is not typical in the field |
| Alarm relay energized, system reports fan fault | Fan speed below threshold; monitoring circuit triggered | ✅ High | Check fault relay contacts (terminals 4–6 on many HIMA fan drawers); verify fan speed/airflow | Correct airflow obstructions; if fans run but fault persists, replace module |
| Excessive noise or vibration | Worn bearings; loose mounting; debris in fan guard | ✅ Medium | Inspect mounting screws, fan guards, and for dust/debris; feel for vibration on rack | Clean, retighten, and retest; if noise remains high, plan a replacement before bearing failure |
| Cabinet temperature rising despite fans running | Airflow path blocked; filters clogged; wrong installation orientation | ❌ Medium (system issue) | Verify bottom-intake / top-exhaust orientation; check filters and cable obstructions | Fix airflow path and filters; K9203 may be fine but ineffective due to cabinet design |
If you’re unsure, send photos of the module label, terminal wiring, and a short video of the fans running (or not). That usually tells us whether this is a power, mechanical, or monitoring issue.
K9203 996920302
K9203 996920302
Frequently Asked Questions (FAQ)
Q1: What exactly is the HIMA (996920302)?
A: It’s a 19-inch, 1U circulation fan drawer with three axial fans, designed to cool HIMA 19″ control racks used in safety and automation systems. It runs on 24 V DC and includes fan-run monitoring and fault alarm contacts.
Q2: Which HIMA systems use the fan module?
A: It’s used across multiple HIMA 19″ rack-based platforms, including HIQuad and HIMax safety systems and related H41q/H51q-style racks. The key is the 19″ form factor and the need for forced ventilation from bottom to top.
Q3: Can I hot-swap the while the rack is running?
A: Mechanically, many sites treat these as hot-swappable because they’re separate 24 V DC accessories, but you must follow your site’s procedure and the OEM guidance. In safety-critical cabinets, even a temporary loss of cooling can push modules toward their thermal limits. Plan the swap during a permitted window and monitor rack temperature.
Q4: Will a K9203A or K9203B work in place of (996920302)?
A: Often yes, but not automatically. K9203A/K9203B are evolved versions with similar function (19″ rack fan, 24 V DC, 3 fans) but may differ in dimensions, terminal layout, and monitoring features. Verify mechanical fit (1 RU, depth), terminal wiring, and alarm contact behavior before substituting.
Q5: How do I wire the fan module?
A: Typical wiring uses spring-cage terminals:
- Terminals 1 & 2: Main 24 V DC supply (L1+, L−)
- Terminal 3: Optional redundant 24 V DC (L2+)
- Terminals 4–6: Fault relay contacts for alarms (NO/COM/NC depending on revision)
Use a 3.5 × 0.5 mm slotted screwdriver and follow the specific HIMA diagram for your exact order code.
Q6: What condition are these modules in?
A: Units listed as “New Original / New Surplus” are unused, often from project overruns or decommissioned systems, with original packaging where available. They are not refurbished unless explicitly stated. For safety-critical sites, request photos of labels, terminals, and packaging before shipment.
Q7: Why is this part sometimes marked obsolete or hard to find?
A: HIMA periodically updates fan modules (e.g., → K9203A/K9203B) and shifts older versions into limited stock. That’s why availability and lead times vary. For long-term support, consider discussing a forward-fit to the current HIMA fan module family with your integrator.
