Industrial Elevator Controller Motherboard | OEM Lift PCBA

This Elevator main logic board is built around the high-speed ESP32 dual-core processor. Our Motherboard G+4 replaces outdated, bulky PLCs with a sleek, heavily optimized microcontroller architecture. Designed for 5-stop (Ground + 4) installations, this board is available with two distinct "Operation and Logic Systems" to match your exact site traffic requirements. Both versions deliver flawlessly smooth motor dispatcher logic, unbreakable safety interrupts, and seamless display communication.

Engineering Marvels & Core Architecture

• Firmware Variant 1: First-Come-First-Serve (FCFS): Engineered for low-traffic residential buildings or freight elevators. This logic executes commands strictly in the chronological order they are received, providing a highly reliable, straightforward point-to-point routing system that eliminates skipping.
• Firmware Variant 2: True Selective-Collective: Designed for high-traffic passenger environments. This advanced dual-array logic actively scans independent calls-Down and calls-Up memory arrays to calculate the most efficient path. It intelligently ignores opposite-direction hall calls until the current directional sweep is complete, drastically reducing wait times and motor wear.
• Robust I2C Pin Expansion: To maintain a compact footprint without sacrificing inputs, the board utilizes dual MCP23017 16-bit I/O expanders over an I2C bus. This allows for dedicated, isolated pathways for main logic and display networks, ensuring zero signal crosstalk.
• Intelligent "Same-Floor" Resolution: Built-in logic prevents system freezing if a passenger presses a hall button for the floor the cabin is currently resting on. The system instantly recognizes the redundancy and cycles the door motor, clearing the call without engaging the main drive.
• 2-Speed VFD Integration: Equipped with dedicated High-Speed, Low-Speed, Motor Up, and Motor Down relay triggers, allowing for perfectly synchronized acceleration and deceleration profiles when wired to standard Variable Frequency Drives (VFDs).

Uncompromising Safety & Diagnostics

• The 25-Second Anti-Burnout Timeout: If the cabin is instructed to move but fails to trigger a floor sensor within 25 seconds (due to cable slip, motor failure, or a jammed hoistway), the ESP32 instantly cuts all motor outputs and throws a hard Error State, protecting your expensive heavy machinery from burning out.
• Digital Noise Debouncing: Elevator shafts are notoriously noisy electrical environments. Our firmware features a strict 50ms software RC debounce filter on all floor sensors. The logic ignores transient voltage spikes, ensuring the cabin never registers a "phantom" floor.
• Strict Safety Chain Polling: The main logic board physically cannot engage the motor drive if the hardware SAFETY_CHAIN_PIN or DOOR_SENSOR_PIN circuits are broken, overriding all other active software commands instantly.

Advanced Operating Modes

• Fireman Mode V3: In an emergency, triggering the Fire Switch instantly wipes all active car and hall calls from the memory arrays. The cabin bypasses all other floors, forces a return to the Ground floor, and parks with the doors held open.
• Hardware Maintenance Mode: Toggle the manual switch to lock out all passenger calls. Site technicians can safely jog the cabin up and down the shaft using dedicated Manual Up/Down inputs, fully protected by the active safety chain.
• The "Secret Reset" Hack: Site technicians can execute a hard reboot of the ESP32 without opening the panel enclosure by holding Button 0 and Button 4 simultaneously for 3 seconds.

Universal Display Compatibility

• Nextion TFT Serial Output: The board continuously streams live data [Floor, Direction, Operating Mode] over serial, making it perfectly plug-and-play with premium Nextion Car Operating Panels (COP).
• Legacy Parallel Support: The secondary I/O expander is pre-programmed to output standard 7-segment bit patterns (including custom patterns for 'Error', 'Fire', and 'Manual' states), ensuring compatibility with traditional scrolling dot-matrix Landing Operation Panels (LOP).