ABB NAMC-01 (3BSE015488R1)
ABB NAMC-01 (3BSE015488R1) - Image 2

ABB NAMC-01 (3BSE015488R1)

Product Brief:​ The NAMC-01 is the main microprocessor control board (part of the RDCU-02C / RDCU-12C assembly)​ inside ABB ACS800, ACSM1, and early ACS850 drives. It executes the drive control algorithms (direct torque control DTC), manages parameter sets, handles the fieldbus interface (via optional fieldbus adapter plugged into its expansion slot — RDCO-01/02/03 with Profibus, Modbus, Ethernet/IP, etc.), and coordinates with the IGBT gate-driver interface board (AINT-02 / AINT-14 etc.). The NAMC-01 is NOT user-replaceable in the field except as part of a complete RDCU swap or authorized service exchange — it contains firmware-calibrated drive data.

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Category: SKU: ABB NAMC-01 (3BSE015488R1)

Description

ABB NAMC-01 (3BSE015488R1)

  • Technical Specifications (representative for ACS800 RDCU):
    • Processor: 32-bit RISC microcontroller + DSP for DTC motor control
    • Memory: Flash for firmware + parameter backup EEPROM; RAM for runtime
    • Fieldbus Expansion: Slot for RDCO-01 (DeviceNet), RDCO-02 (Modbus RTU / Profibus DP via piggyback), RDCO-03 (Modbus TCP / Ethernet/IP / Profinet via daughter card); also direct RJ45 on later versions for Modbus TCP
    • I/O on Board: Start/Stop, Direction, Reference via digital inputs on adjacent I/O board (NIOC / NDIO); analog I/O via NAIO-03/NAIO-03F on RDCO
    • Communication to Power Section: Fiber optic link to AINT (IGBT gate driver & DC link sensing)
    • Indicators: Run, Fault, Ready LEDs on drive door; internal test points on NAMC-01 accessible only with cover removed (service only)
    • Power: 24 V DC derived from internal SMPS (via AINT or separate PS board)
    • Firmware: DriveWare / ACS800 firmware (e.g., version Rxxx); firmware version must match drive type & power stack
    • Operating Temp.: –20 °C to +60 °C (inside drive enclosure)
  • Functional Features:
    • Executes Direct Torque Control (DTC) — estimates motor flux & torque every 25 µs for fast torque response without encoder (unless encoder option fitted)
    • Stores motor parameters (2 sets — motor 1 / motor 2 selectable), application macros, fieldbus mapping
    • Provides built-in PLC functionality (Drive AP — application programming in select models) or simple logic (via digital I/O + timer/counter function blocks)
    • Handles ID Run (motor identification — static / rotating) to auto-tune control loops
  • Application Scenarios:
    • Central brain of ACS800/ACSM1 drive — controls induction / permanent magnet / synchronous motors up to several MW
    • Retrofit / spare — replaced only as part of RDCU assembly in authorized service centers; not intended as field-pluggable consumer spare (unlike NAIO-03)
  • Material & Structure / Working Principle / Installation / Precautions:
    • NAMC-01 is part of RDCU — if faulty, ABB recommends swapping entire RDCU (control unit) to avoid EEPROM/firmware mismatch
    • Firmware must be reloaded / matched to power stack after RDCU replacement — use DriveWindow / USB stick
    • Precaution:​ Only trained service personnel should handle — control unit contains ESD-sensitive components and stores safety-critical parameters. After replacement, perform motor ID run and verify all I/O & fieldbus mappings before returning to auto mode.

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