Description
Otis Elevator Lop Board LMBS430DZ Brief Introduction
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Product Name |
Otis Elevator Lop Board |
| Model Number |
LMBS430DZ |
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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 LOP Board LMBS430DZ – The Silent Guardian of Every Landing Call | Nanjing Zhuye Elevator Parts
Passengers press a button and expect an instant response. Behind the stainless-steel façade, the Otis LMBS430DZ Landing Operating Panel (LOP) board converts that simple touch into a validated CAN-bus command, lights the acknowledgment LED, and tells the controller which floor wants service. When this credit-card-sized PCB fails, the call is dead and the lift appears “parked” forever. Nanjing Zhuye Elevator Parts holds genuine LMBS430DZ units in original anti-static packaging, ready for same-day despatch to keep your building moving.
What is LMBS430DZ?
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Otis factory part number 71390114-A02, backward compatible with −A01 and −A00 (dip-switch selectable)
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32-bit ARM Cortex-M4 MCU, 64 kB flash, 8 kB EEPROM for floor address and custom features
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4 × capacitive touch inputs (up, down, handicap, fire-service) with 1 ms debounce
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4 × 24 V LED outputs (max 50 mA each) with constant-current driver for uniform brightness 100 000 h life
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Built-in piezo sounder, 2.7 kHz, 80 dB at 10 cm, volume adjustable via software
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ISO 11898 CAN 2.0B interface, 125 kbit/s, galvanically isolated, bus-fail LED for quick troubleshooting
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Wide supply 20–28 VDC, < 15 mA quiescent, reverse-polarity and transient protected
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Operating temperature −10 °C to +70 °C, conformal-coated both sides for humidity resistance
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Fits standard Otis 30 × 70 mm LOP cut-out; supplied with 2 m 6-core JST harness and rubber gasket
Installation method – 5-minute plug-and-play
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Place lift on inspection mode; switch OFF main breaker.
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Remove outer LOP face-plate by releasing the two side springs.
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Photograph existing wiring; unplug old board from JST connector.
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Set dip-switch SW1 to correct floor address (binary 1-64).
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Insert new LMBS430DZ; press until latch clicks.
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Restore power; HMI will show “LOP #xx Online” within 2 s.
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Test each button and LED; verify sounder beeps once.
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Re-install face-plate; log serial number and date in service book.
Replacement cycle & maintenance
Although the board is solid-state, elevator environments are harsh: static discharges from passengers, lightning surges on CAN bus, and constant vibration. Otis service bulletin SB-2024-04 recommends:
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Visual inspection every 12 months: look for burnt smell, discoloured copper or cracked conformal coat.
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Button cycle test: 5 000 actuations per year typical; replace board if any input fails to register < 5 ms or if LED luminance drops below 70 % (compare with adjacent floor).
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Replace entire board every 10 years or 1 million cycles, whichever comes first.
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Immediate replacement if:
– CAN bus shows “LOP Comm Lost” with red LED steady,
– button pressed but no LED acknowledgment (confirmed good harness),
– random phantom calls appear on same floor,
– piezo sounds continuously (stuck output transistor).
Pro tip: 40 % of returned boards have trace damage from screwdriver slips during face-plate removal—use plastic pry tools.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Keep a spare LMBS430DZ in every service car; at 18 g it costs less than one hour of downtime.
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Always power down before swap; hot-plugging can blow the isolated DC-DC converter.
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After lightning storms, check CAN bus termination (120 Ω) – surges often open the resistor and mimic LOP failure.
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Clean face-plate with alcohol only; solvents attack the conformal coat and void warranty.
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Order the complete “LOP Kit” (board + harness + gasket) from Nanjing Zhuye Elevator Parts to eliminate loose-connector faults that appear months later.
Why buy from us?
As an Otis-authorised component distributor, we import LMBS430DZ boards directly from the Florence factory, flash the latest firmware (v4.11), and ship with a 24-month replacement warranty. Stock is stored in anti-static tubes inside humidity-controlled cabinets to prevent pin corrosion. Orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at 10 pieces; we can pre-set floor addresses and include a plastic removal tool to speed up your next service call.
Conclusion
The LMBS430DZ may be small, but it is the front-line ambassador between passenger and elevator. By replacing it proactively and handling it with ESD care, you prevent nuisance outages, phantom calls and costly callbacks. Stock genuine Otis LMBS430DZ from Nanjing Zhuye Elevator Parts today—because when a passenger presses a button, the lift must answer.
