AINT-14C ABB 68685826 PCB COMPONENTS MC INTERFACE BOARD

AINT-14C ABB 68685826 PCB COMPONENTS MC INTERFACE BOARD

1.Overview of the AINT-14C ABB 68685826

The ABB AINT-14C is the main circuit interface board for the ACS800 series inverters, known as the "heart of the inverter." It converts digital commands from the control board into analog drive signals required by the power modules, precisely controlling IGBT switching and achieving smooth regulation of motor voltage and frequency. Its onboard high-speed 26 MHz processor with 14-bit resolution completes a complete closed-loop calculation within 1 ms. It also features quadruple hardware protection for overcurrent, overvoltage, short circuit, and undervoltage, with a fault response time of less than 2 μs, effectively locking pulses and uploading alarm codes. Its modular plug-in design supports hot swapping, allowing replacement within 10 seconds. It boasts an IP30 protection rating and a corrugated aluminum casing for enhanced heat dissipation. It operates stably in temperatures ranging from -20 to +60°C and can operate at altitudes up to 4,000 meters without derating. Compatible with all ACS800-01/02/04/07 racks, it seamlessly integrates with AC800F/AC800M DCS systems. It offers Modbus RTU, Profibus DP, and DeviceNet communication protocols, facilitating remote start/stop, online parameter modification, and status monitoring. Measuring 130 × 125 × 20 mm and weighing only 0.15 kg, it is CE and RoHS certified and widely used in industrial automation applications such as fans, pumps, compressors, extruders, elevators, and conveyor lines.

2.Core Features:

1. Core Parameters
Order Number: 68685826 (AINT-14C)
Physical Dimensions: ≈ 213 mm × 210 mm × 20 mm; Weight: ≈ 0.13 kg
Operating Voltage: 24 V DC (control side) / 440 V AC (power side maximum)
Output Switching Frequency: 50 Hz nominal; Processor Clock: 26 MHz
Control Response: Closed-loop Operation Cycle ≤ 1 ms, Protection Response < 2 µs
Signal Resolution: 14 bits (analog channel)
Channel Capacity: Typical 8–15 configurable I/O channels (automatically identified by system firmware)
Communication Ports: Onboard RS-485 (Modbus RTU default) / Fiber Optic Link (AINT-24C redundant)
Environmental Rating: Operating Temperature: 0…+65°C, Humidity: 0–95% RH non-condensing; IP20
Certifications: CE, RoHS, UL 508 (File E214113)

2. Main Functions
Signal Conversion: Converts digital commands from the control board into analog ±15V pulses required for IGBT driving, achieving precise PWM output.
Power Control: Directly drives the three-phase inverter module, implementing V/f, vector, or DTC control strategies.
Multiple Protections:
- Hardware overcurrent, short circuit, overvoltage, undervoltage, and overtemperature real-time pulse lockout;
- Fault signals are uploaded to the CU via optical fiber/RS-485, supporting remote diagnosis.
Hot-Swap: Modular slide rail design enables replacement within 10 seconds without removing power cables.
System Compatibility: Seamlessly integrates with the AC 800F, AC 800M, PLCs, and DCSs, supporting optional Profibus and DeviceNet expansion.
Self-Test and Logging: Power-on self-test and periodic self-test during operation, with up to 40 fault records saved for easy traceability.

3. Typical Applications
- ACS800-01/02/04/07 Cabinet Drives
- Fans, pumps, compressors, extruders, elevators, conveyor lines, etc., with motors ranging from 0.37–250 kW
- Process control applications requiring high dynamic response or safe, continuous operation

3.Product details pictures

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