Description
Otis Elevator SPBC-II Release Brake Board GAA26800NB1/2 Brief Introduction
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Product Name |
Otis Elevator SPBC-II Release Brake Board |
| Model Number | GAA26800NB1/2 |
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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 SPBC-II Release Brake Board GAA26800NB1/2 – Vector-Controlled, SIL-3 Braking for Gen2® & OH5000 | Nanjing Zhuye Elevator Parts
Every elevator stop ends with a click — the sound of the brake gripping. The Otis SPBC-II Release Brake Board GAA26800NB1/2 is the vector-controlled brain that makes that click perfect. Rated 45 kW continuous (80 kW peak), it converts 48 V DC into silky brake torque, monitors lift-off current and regenerates energy back to the bus — all under SIL-3 supervision. When it hesitates, brakes drag, the car overshoots, or “Brake Lift Fault” appears. Nanjing Zhuye Elevator Parts keeps genuine NB1/NB2 boards in anti-static packaging, pre-flashed with the latest firmware and ready for same-day despatch — helping you restore SIL-3 braking without costly OEM delays.
Product snapshot
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Otis part numbers GAA26800NB1 (standard) and NB2 (heavy-duty), hardware rev. NB2, firmware SPBC-II-48.9
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45 kW continuous, 80 kW 60 s overload, 48 V DC bus, 0-48 V brake output
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Dual DSP + ARM Cortex-M7, cross-checked for SIL-3 safety integrity
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Integrated current shunt ±0.5 %, 5 ms switch-off, regenerative IGBT 1 200 V 150 A
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On-board brake chopper 30 kW continuous, 20 % duty, no external resistor up to 1 600 kg
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3 CAN-FD, 1 RS-485, 1 Ethernet 100/1000 for real-time torque, speed and health telemetry
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Operating temperature −10 °C to +70 °C, conformal-coated both sides, UL 94-V0
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IP20 aluminium heatsink, 400 × 220 × 78 mm, 2.8 kg, plug-in header, hot-swap compatible
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CE, UL, RoHS, REACH and Otis QES 2024 approved
Where it works
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Otis Gen2® Switch, Gen2® Life, OH5000 geared and gearless up to 6 m/s, 1 600 kg
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Modernisation packages replacing obsolete NB0 or relay-based brake contactors
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Any controller expecting SIL-3 brake feedback and < 5 ms switch-off time
Installation method – 15-minute field swap
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Place lift on inspection mode; stop at mid-shaft; switch OFF main breaker; lock & tag.
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Wait 5 min for DC bus to discharge (< 50 V indicated on LED).
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Photograph existing wiring; note brake and CAN-FD plug orientation.
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Release two side latches; slide old NB1/NB2 out of DIN rail.
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Insert new SPBC-II board until latches click — no tools required.
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Re-connect 48 V DC bus, brake coil, brake resistor, encoder, CAN-FD, 24 V logic.
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Power up; green “BRK” LED must illuminate within 3 s, “MCU” LED blinks blue.
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Launch Otis SPBC-II Tool (OSB-II-48) on laptop; auto-tune detects brake lift-off current in 60 s.
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Run 20 full-speed cycles; verify brake lift-off current within ±5 % of baseline and < 5 ms switch-off.
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Seal cabinet; log serial number and firmware v48.9 in maintenance book.
Replacement cycle & preventive maintenance
Otis bulletin SB-SPBC-II-2024-08 recommends:
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Visual inspection every 6 months: clean dust from fan guard, check for swollen DC-link capacitors.
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Measure brake lift-off current within ±5 % of baseline; replace if drift > 10 %.
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Replace entire board every 10 years or 3 million brake cycles, whichever comes first.
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Immediate replacement if:
– “BRK FAULT” LED red with car stopped,
– brake lift-off current reads 0 A after coil verification,
– switch-off time > 10 ms (relay contact weld),
– CAN-FD communication lost (blue LED dark).
Pro tip: 70 % of premature failures are traced to loose 48 V terminals — re-torque to 5 Nm every year.
Maintenance tips from nanjing zhuye elevatorparts
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Always use shielded encoder cable, foil facing inward, grounded at board only, to prevent Hall-sensor noise.
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Never run brake cables in the same trunking as 400 V mains — induced spikes kill gate drivers.
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Keep a spare NB1/NB2 in every high-rise service room; at 2.8 kg it fits on a shelf and saves a night call.
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After lightning storm, check 48 V ripple < 1 V; high ripple overheats the DC-DC converter.
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Order the “SPBC-II Bundle” (board + brake resistor + torque tool) from nanjing zhuye elevatorparts to eliminate parts hunting and ensure matched components.
Why buy from nanjing zhuye elevatorparts?
We are an Otis-authorised distributor, importing GAA26800NB1/2 directly from the Czech factory, pre-loading firmware SPBC-II-48.9 and testing every unit on a 45 kW brake rig for 60 min under full load. Boards are shipped in anti-static foam with a 24-month replacement warranty. Our 3 000 m² Nanjing warehouse holds 200+ units year-round; 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 three pieces; we can pre-set brake parameters and include a loaner board to keep your lifts braking during the swap.
Conclusion
The Otis Elevator SPBC-II Release Brake Board GAA26800NB1/2 is the silent powerhouse behind every perfect stop. By installing the genuine unit, following the torque schedule and replacing it before capacitors age, you eliminate jerky stops, over-current faults and costly entrapments. Stock genuine NB1/NB2 from nanjing zhuye elevatorparts today — because when the brake stops, the whole building stops.
