Description
Otis Elevator SPBC-II Release Board GBA26800KB1 Brief Introduction
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Product Name |
Otis Elevator SPBC-II Release Board |
| Model Number |
GBA26800KB1 |
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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 SPBC-II Release Board GBA26800KB1 – Precision Brake Control for Safer, Smoother Stops | Nanjing Zhuye Elevator Parts
Long after the motor has shut down, one final command must still be perfect: “release the brake.” The Otis SPBC-II Release Board GBA26800KB1 is the precision switch that lifts the brake coil, monitors lift-off current, and drops the brake within 5 ms when the safety chain opens. Built for Gen2® and 4200 gearless machines, it converts 48 V DC into a regulated, current-limited release, then regenerates coil energy back to the bus—quiet, cool, and reliable. When it hesitates, you feel jerky stops, “Brake Lift Fault” codes, or unexpected emergency halts. Nanjing Zhuye Elevator Parts keeps genuine GBA26800KB1 units in anti-static packaging, pre-flashed with the latest firmware and ready for same-day despatch—helping you restore confident stops without costly OEM delays.
Product snapshot
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Otis part number GBA26800KB1, hardware rev. KB1, firmware SPBC-II-4.2
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Dual-channel 48 V DC brake outputs, 10 A continuous, 30 A 2 s peak, smart high-side switches
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0.05 Ω current shunt, 16-bit ADC, ±1 % lift-off current verification, 5 ms switch-off time
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Dual SIL-3 relays cross-checked by dual ARM Cortex-M0 MCUs, fail-safe de-energise on any fault
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Regenerative braking IGBT, 1 200 V, 20 A, returns coil energy to DC bus, no external resistor needed
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24 V logic supply, 100 mA, reverse-polarity and surge protected, CAN-FD 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 heat-spreader, 165 × 100 × 32 mm, 0.42 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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Gen2® Life, Gen2® Switch, Gen2® Flex with MX10-MX50 permanent-magnet machines
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4200/5200 high-speed gearless up to 4 m/s, 1 350 kg rating
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Modernisation packages replacing obsolete SPBC-I or relay-based brake contactors
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Any controller expecting SIL-3 brake feedback and < 5 ms switch-off time
Installation method – 10-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 polarity and CAN-FD plug.
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Release two side latches; slide old SPBC-II board out of DIN rail.
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Insert new GBA26800KB1 until latches click—no tools required.
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Re-connect 24 V, 48 V brake lines, CAN-FD, relay feedback.
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Power up; green “BRK” LED must illuminate within 3 s, “COM” LED blinks blue.
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Launch Otis Brake Tool (OBT-II) on laptop; auto-test cycles brake 3× and records lift-off current.
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Verify lift-off current within ±5 % of baseline; switch-off time < 5 ms.
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Return to normal mode; log serial number and firmware v4.2 in maintenance book.
Replacement cycle & preventive maintenance
Although solid-state, brake boards live in a harsh world—coil surges, summer heat and voltage spikes. Otis bulletin SB-BRK-2024-03 recommends:
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Visual inspection every 6 months: clean dust, check for burnt I/O terminals.
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Brake current test: lift-off current must be within ±5 % of baseline; replace board 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,
– 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: 60 % of premature failures are traced to loose 48 V terminals—re-torque to 1.8 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use the suppressor diode across the brake coil; back-EMF > 150 V destroys output switches.
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Never hot-plug I/O while the lift is running; transients can weld relay contacts.
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Keep a spare GBA26800KB1 in every service room; at 0.42 kg it fits in a pocket and saves a night call.
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After lightning storm, check 24 V ripple < 1 V; high ripple overheats the DC-DC converter.
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Order the “SPBC Bundle” (board + suppressor diode + torque tool) from Nanjing Zhuye Elevator Parts to eliminate parts hunting and ensure matched components.
Why buy from Nanjing Zhuye Elevator Parts?
We are an Otis-authorised distributor, importing GBA26800KB1 directly from the Czech factory, pre-loading firmware SPBC-II-4.2 and testing every unit on a 48 V brake simulator 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 150+ 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 GBA26800KB1 SPBC-II Release Board is the silent guardian that turns brake commands into safe, verified motion. By installing the genuine Otis unit, following the torque schedule and replacing it before relays age, you eliminate brake-sticking faults, unexpected stops and costly passenger entrapments. Stock genuine GBA26800KB1 from Nanjing Zhuye Elevator Parts today—because when the brake brain stops, the whole lift stops.
