Description
Otis elevator electronic board FBA25402CD2 original import Brief Introduction
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Product Name
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Otis elevator electronic board original import PCB board |
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Model
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FBA25402CD2
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Otis Elevator Electronic Board FBA25402CD2 – The Compact Command Bridge Behind Every Smooth Otis Ride
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
When passengers press a car button or watch the floor indicator scroll, they are really talking to a postcard-sized green PCB hidden inside the controller cabinet — the FBA25402CD2 electronic board. This third-generation Otis command interface, measuring only 160 × 100 mm, links the main CPU to floor buttons, indicators, door operator and safety chain through one unified serial bus. Nanjing Zhuye Elevator Parts keeps factory-sealed CD2 boards in anti-static stock for same-day despatch. Below we explain what the board does, how to install it in under ten minutes, and the replacement cycle that prevents expensive “command fault” call-backs.
1. What FBA25402CD2 Really Does
Mounted on DIN-rail inside the LMCB or GECB cabinet, the board:
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Converts 24 VDC logic signals from the main MCU into 12 VDC/5 VDC rail for COP, LOP and segment indicators
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Drives up to 64 floor buttons and 4 direction arrows through a 50-pin flat cable
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Exchanges door-open, door-close and inspection signals via CAN-bus at 125 kbit s⁻¹
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Monitors safety chain feedback; opens brake and contactor circuits within 40 ms if a contact drops
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Stores floor table, learn data and last 100 fault events in 512 K FRAM — retains data for 20 years without battery
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Provides on-board +5 V and +12 V regulators, saving an extra power supply
If CD2 fails, the cab goes dark, the doors refuse to move, and the controller logs “EF4 Command Timeout”.
2. Compatible Systems
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Otis Gen2®, Gen2-Life®, SkyRise® 1.0–2.5 m s⁻¹
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Thyssen TCM-MC2 → MC3 retrofit kits
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KONE EcoDisc™ modernisation with Otis protocol
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Chinese OEM controllers with 24 VDC logic and serial segment drive
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Simplex or group (≤8 cars)
3. Installation – 8-Minute Hot Swap
Safety: place controller on INSTALL, lock main breaker, wait 60 s for DC bus to discharge.
Step 1 – Open controller door; photograph existing wiring.
Step 2 – Undo four M3 screws holding the plastic carrier; slide CD2 out of DIN rail guides.
Step 3 – Disconnect (in order) 50-way ribbon, 6-way CAN, 4-way 24 VDC supply and 2-way feedback.
Step 4 – Inspect ribbon for bent pins; if any conductor shows copper, replace cable (Nanjing Zhuye part CB-50-300).
Step 5 – Insert new CD2 until latches click; reconnect all keyed plugs.
Step 6 – Power up; green D1 LED blinks 2 Hz for 3 s, then solid — board has joined CAN network.
Step 7 – Run one full learn trip; verify floor indicator counts every floor.
Step 2 – Undo four M3 screws holding the plastic carrier; slide CD2 out of DIN rail guides.
Step 3 – Disconnect (in order) 50-way ribbon, 6-way CAN, 4-way 24 VDC supply and 2-way feedback.
Step 4 – Inspect ribbon for bent pins; if any conductor shows copper, replace cable (Nanjing Zhuye part CB-50-300).
Step 5 – Insert new CD2 until latches click; reconnect all keyed plugs.
Step 6 – Power up; green D1 LED blinks 2 Hz for 3 s, then solid — board has joined CAN network.
Step 7 – Run one full learn trip; verify floor indicator counts every floor.
No laptop or download is required; firmware is pre-flashed to match Otis checksum 0x8D7B.
4. Daily Operation – What the Board Actually Does
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Updates floor display every 50 ms; no ghosting or skipping
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Auto-dims LEDs to 30 % after 22:00 (energy code compliant)
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Built-in terminating resistor (120 Ω) jumper-selectable — no external resistor needed
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Temperature sensor on PCB derates CAN speed above 70 °C — no summer nuisance faults
5. Replacement Cycle & Preventive Maintenance
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High-traffic office (>1,000 starts day⁻¹) – vacuum dust every 6 months, replace board every 6 years
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Residential tower (300–600 starts day⁻¹) – inspect annually, replace every 10 years
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Low-rise freight (≤200 starts day⁻¹) – inspect every 18 months, replace every 12 years
Replace immediately if:
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D1 LED stays red for >5 s (internal 5 V rail fault)
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CAN “EF4 Command Timeout” logged ≥3 times in 30 days
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Floor indicator skips or shows “––”
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Ribbon connector burnt (usually shorted LED segment)
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FRAM checksum error 0xF0 after power dip (data corrupt)
6. Extending Life – 3 Pro Tips
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Keep 24 VDC supply ±5 %; spikes above 30 V kill the on-board buck converter
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Close controller door properly; dust on edge connectors is the #1 killer
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Tie ribbon cable away from brake resistor; oil + dust creates a conductive film that shorts LED lines
7. Why Buy FBA25402CD2 from Nanjing Zhuye Elevator Parts?
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Factory-new, not refurbished; board passes ICT, 4-hour burn-in at 60 °C, and final functional test
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Firmware pre-flashed; matches Otis original checksum, no teach-in required
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Anti-static aluminum bag + foam box — safe for air freight
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Dual stock: 480 pcs Nanjing, 150 pcs Dubai — next-day delivery to 65 countries
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Warranty: 24 months replacement, no factory RMA wait
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Tech support: 7×24 WhatsApp/WeChat video call if fault codes persist
Conclusion
The FBA25402CD2 electronic board is the invisible bridge that turns logic commands into passenger information and door motion. A single communication fault can park a car for hours. Keep a spare CD2 from Nanjing Zhuye on every service truck, swap it on schedule, and replace “command timeout” panic with an eight-minute planned fix — one smooth, silent ride at a time.
