Description
Otis Escalator Board GCA26803A1 Brief Introduction
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Product Name |
Otis Escalator Board |
| Model Number |
GCA26803A1 |
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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 Escalator Board GCA26803A1 – The Brains Behind Every Safe Step | Nanjing Zhuye Elevator Parts
An escalator never sleeps—it just keeps stepping. Inside the controller cabinet the Otis GCA26803A1 board works like a brain, scanning motor current, handrail speed, step missing sensors and brake temperature hundreds of times per second. When it trips, the whole staircase stops and shoppers start complaining. Nanjing Zhuye Elevator Parts keeps factory-fresh GCA26803A1 assemblies in anti-static packaging, flashed with the latest firmware and ready for same-day despatch—helping you restore smooth motion without costly OEM delays.
Product snapshot
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Otis part number 713A26803-A1, revision C6, firmware bundle ESC-11.4
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32-bit dual ARM Cortex-M4, cross-checked for SIL-2 safety integrity
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48 digital inputs (24 V DC) for step missing, comb impact, skirt switches, handrail encoder
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16 high-speed inputs (100 kHz) for motor encoder, brake disc, tachometer
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24 relay outputs (NO/NC) up to 250 VAC 8 A: motor contactor, brake, lubrication pump, alarm bell
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4 analogue inputs 0-10 V / 4-20 mA for motor current, oil temperature
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2 RS-485 and 1 CAN-FD for remote monitoring, group diagnostics, fire-service link
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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, 280 × 165 × 42 mm, 0.8 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 506 NCE, 508 NCE, 510 NCE escalators up to 12 m rise and 0.65 m/s
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ReGen® drive modernisations where old relay logic is replaced by microprocessor control
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Any public transport, shopping mall or hospital escalator demanding SIL-2 stopping performance
Installation method – 15-minute field swap
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Place escalator on inspection mode; stop at upper landing; switch OFF main breaker; lock & tag.
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Wait 5 min for DC bus to discharge (< 50 V).
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Photograph existing wiring; note encoder plug orientation.
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Release two side latches; slide old board out of DIN rail.
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Insert new GCA26803A1 until latches click—no tools required.
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Re-connect 24 V supply, all I/O cables, encoders, CAN-FD.
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Power up; green “SYS” LED must illuminate within 3 s, “COM” LED blinks blue.
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Launch Otis Escalator Tool (OET-11) on laptop; auto-detect recognises board revision and uploads parameters in 90 s.
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Run full inspection cycle: motor start, brake lift, step missing test, handrail overspeed test; verify no fault codes.
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Return to normal mode; log serial number and firmware v11.4 in maintenance book.
Replacement cycle & preventive maintenance
Although solid-state, escalator boards live in a harsh world—vibration, brake dust, summer heat and voltage spikes. Otis bulletin SB-ESC-2024-03 recommends:
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Visual inspection every 6 months: clean dust from fan guard, check for burnt I/O terminals.
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Functional test every 12 months: measure contact resistance of safety-chain inputs < 50 mΩ.
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Replace entire board every 10 years or 30 000 operating hours, whichever comes first.
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Immediate replacement if:
– “CPU FAULT” LED red with escalator stopped,
– encoder inputs show “speed deviation” after cable swap,
– relay outputs weld closed (contacts pitting),
– CAN-FD communication lost (blue LED dark).
Pro tip: 60 % of premature failures are traced to loose 24 V terminals—re-torque to 0.8 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use shielded encoder cables, foil facing inward, grounded at board only, to prevent noise faults.
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Never hot-plug I/O while escalator is running; transients can weld relay contacts.
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Keep a spare GCA26803A1 in every service room; at 0.8 kg it fits in a laptop bag 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 “Board Bundle” (GCA26803A1 + fan + terminal 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 GCA26803A1 directly from the Florence factory, pre-loading firmware ESC-11.4 and testing every unit on a 48 I/O 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-load site-specific parameters and include a loaner board to keep your escalators running during the swap.
Conclusion
The GCA26803A1 board is the silent brain that turns thousands of mechanical parts into one smooth, safe staircase. By installing the genuine Otis unit, following the torque schedule and replacing it before capacitors age, you eliminate phantom stops, handrail faults and costly shopper complaints. Stock genuine GCA26803A1 from Nanjing Zhuye Elevator Parts today—because when the board stops, the steps stop.
