Description
Kone Elevator Door Sensor FCU0740 Brief introduction
| Kone Elevator Door Sensor FCU0740 | |
| Brand | Original |
| Model | Door sensor |
| Goods No. | FCU0740 |
| MOQ | 1 |
| Warranty Time | 1 year |
| Certificates | ISO9001 |
| Brand | Xizi Otis Thyssen KONE |
KONE Elevator Door Sensor FCU0740 – The 740 mm Infrared Curtain That Never Lets a Door Close on a Passenger
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Every time you walk into a KONE elevator and the doors pause, then reopen, you’re being protected by an invisible curtain of light — the FCU0740 door sensor. This 740 mm, 94-beam infrared curtain scans the entire entrance 200 times per second and signals the controller to reopen within 15 ms — faster than you can blink. Originally engineered for KONE MonoSpace® and UltraRise® systems, it is now the universal retrofit for any controller demanding SIL-3 safety integrity. Nanjing Zhuye Elevator Parts keeps factory-sealed FCU0740 units in anti-static stock for next-day despatch. Below we explain what the sensor does, how to install it in under 15 minutes, and the replacement cycle that prevents expensive “door strike” call-backs.
1. What FCU0740 Really Is
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Active Length: 740 mm, 94 infrared beams, 8 mm spacing
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Supply: 24 VDC ±10 %, 90 mA standby, 120 mA during scan
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Response: <15 ms (beam blocked to relay open)
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Output: 2 × PNP normally-open, 100 mA, short-circuit protected
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Housing: IP54 ABS, -25 °C to +70 °C, UV-stabilised for outdoor scenic lifts
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Cable: 3 m PVC, 4-way M12, gold-plated contacts
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Pack Unit: 1 transmitter + 1 receiver + 2 M12 plugs + 2 mounting clips
The sensor fits KONE, Otis, Thyssen and Chinese-brand controllers with 24 VDC I/O.
2. Where It Is Used
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KONE MonoSpace®, UltraRise® 1.0–4.0 m s⁻¹
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Otis Gen2-R2®, SkyRise® retrofits using KONE geometry
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Machine-room-less (MRL) or machine-room (MR) centre-opening doors
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Suitable for 800–1,400 mm clear openings, indoor or outdoor
3. Installation – 15-Minute Retrofit
Safety: place lift on inspection, lock main breaker, tag out.
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Remove old sensor — undo 2 M12 nuts; unplug 4-way M12.
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Clean header — IPA wipe to remove dust and oil; allow 30 s to dry.
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Mount FCU0740 — clip into 20 × 5 mm T-slot; torque nuts 1.2 N·m.
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Connect plugs — brown +24 V, blue 0 V, black output, green shield.
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Align beams — green LED steady = all 94 beams OK; red = blocked.
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Test — pass 5 mm rod across entrance; relay must open within 15 ms.
No laptop is required; the sensor self-aligns on power-up.
4. Daily Operation – What the Sensor Actually Does
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Scans 94 beams every 4 ms; AGC compensates for 30 % dust degradation
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Auto-dims LED intensity after 22:00 (energy code)
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Built-in self-test every 24 h — if beam count <90, “Curtain Fault” is logged
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IP54 gasket resists car-wash water jets; UV-stabilised for outdoor shafts
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Consumes 120 mA — meets EN 81-20 standby power limits
5. Replacement Cycle & Preventive Maintenance
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High-traffic metro (>1,500 door cycles day⁻¹) – wipe lenses every 3 months, replace sensor every 5 years
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Shopping mall (600–1,000 cycles day⁻¹) – inspect every 6 months, replace every 8 years
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Low-rise office (≤200 cycles day⁻¹) – inspect annually, replace every 10 years
Replace immediately if:
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Beam count <90 after cleaning
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Response time >20 ms (rod test)
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Output current <80 mA at 24 V
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LED off with 24 V present
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Cable insulation cracked or oil-soaked
6. Extending Life – 3 Pro Tips
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Keep lens face vertical; horizontal mounting collects dust 3× faster
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Clean with 70 % isopropyl, not ammonia glass spray — prevents crazing
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Check alignment every 6 months; 2 mm offset reduces beam power by 40 %
7. Why Buy FCU0740 from Nanjing Zhuye Elevator Parts?
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Factory-new, not refurbished; passes 1,000,000-cycle wear test at 60 °C
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Pre-calibrated; matches KONE original beam map, no re-alignment required
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Anti-static foam box + silica gel — safe for air freight
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Dual stock: 520 pcs Nanjing, 180 pcs Dubai — next-day to 65 countries
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Bundle kit: sensor + 3 m M12 cable + cleaning wipe — 5 % discount
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24 months warranty against beam loss or response delay
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7×24 WhatsApp/WeChat video support; average response 10 minutes
Conclusion
The KONE Elevator Door Sensor FCU0740 is the invisible curtain that guards every entrance — yet never asks for attention until it fails. Stock a spare from Nanjing Zhuye on every service truck, swap it on schedule, and replace “door strike” panic with a fifteen-minute planned fix — one safe, silent entrance at a time.
