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ABB NDCU-21C Digital Drive Control Unit
ABB NDCU-21C is a digital drive control unit designed for ABB industrial drive systems, serving as the core control component of ACS 600 series inverters. The unit receives external control signals and feedback signals, and combines built-in control algorithms to accurately regulate motor operating parameters such as speed, torque, and direction. It also features system status monitoring and fault diagnosis functions to ensure safe and stable operation of the drive system. Its modular design can be directly integrated into the inverter body, working in conjunction with power modules and detection circuits.
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ABB NDCU-21C Digital Drive Control Unit
Specific Parameters
- Processor: 32-bit microprocessor with an operating speed of 100 MIPS.
- Control signal input: 2 analog inputs (4-20mA/0-10V), 6 digital inputs (24V DC).
- Feedback signal interface: Supports incremental encoder (HTL/TTL) and resolver interface.
- Output signals: 2 analog outputs (4-20mA), 4 digital outputs (relay output, 250V AC/5A).
- Operating voltage: 24V DC (allowable fluctuation range ±15%).
- Power consumption: Maximum 15W.
- Operating temperature range: -10°C to +50°C.
- Storage temperature range: -40°C to +70°C.
- Relative humidity: 5%-95% (non-condensing).
- Communication interface: RS485 (supports Modbus RTU protocol).
- Dimensions: 102mm×76mm×279mm (length×width×height).
- Weight: 1.4kg.
Product Performance
- High-precision control: Adopts vector control algorithm, speed control accuracy up to ±0.01% (with encoder feedback), torque response time ≤10ms.
- Wide range adaptation: Can drive asynchronous and synchronous motors, adapting to power range 0.75kW-200kW.
- Fast dynamic response: Speed step response time ≤50ms, quickly adapting to load changes.
- Comprehensive protection functions: Equipped with 16 protection mechanisms including overcurrent, overvoltage, undervoltage, overheating, and motor stall, with fault response time ≤100μs.
- ication: Reliable data transmission with upper computer through anti-interference RS485 interface, maximum communication rate 115.2kbps.
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