The ABB BAMU-11 is a specialized auxiliary measurement unit designed primarily for use with the ACS880 and ACS800 series frequency converters. This hardware interface provides high-precision sensing and conditioning of motor or grid voltages, enabling advanced control functions such as synchronization, flux optimization, and grid-side monitoring in regenerative drive systems.
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Product Specifications
| Feature | Details |
| Model Name | BAMU-11 |
| Product ID | 3AUA0000109935 |
| Country of Origin | Estonia / Finland |
| Input Channels | 3-Phase Voltage Measurement |
| Rated Voltage | Up to 690V AC (System dependent) |
| Dimensions (WxHxD) | 110 x 145 x 45 mm |
| Net Weight | 0.52 kg |
| Interface | Fiber Optic / Terminal Blocks |
| Mounting | DIN Rail or Plate Mount |
Operational Precautions
- High Voltage Safety: The measurement inputs are directly connected to the power circuit; ensure the system is de-energized and locked out before connecting or disconnecting the sensing leads.
- Fiber Optic Handling: Communication with the drive control unit is often via fiber optics. Do not touch the ends of the fiber cables and maintain the specified bend radius to prevent signal attenuation.
- Correct Phase Sequence: Ensure the input phases (U, V, W) match the drive’s internal phase orientation to prevent errors in synchronization or vector control.
- Grounding: The unit must be properly earthed to the common cabinet ground to ensure electromagnetic compatibility (EMC) and accurate measurement readings.
FAQ (Questions & Answers)
Q: What is the primary purpose of the BAMU-11? A: It is typically used in systems requiring “Grid-Side” measurement or where the drive needs to synchronize its output with an existing AC bus before closing a contactor.
Q: Can this unit be used independently of an ABB drive? A: No, the BAMU-11 is an auxiliary component designed to interface specifically with ABB’s high-end drive control boards (such as the BCU or RMIO units).
Q: What do the onboard status LEDs indicate? A: The “V1-V3” LEDs indicate the presence of input voltage on each respective phase, while a separate “Status” LED confirms the healthy operation of the internal processing logic.
Similar Drive Interface Models
- BAMU-01 (3AXD50000004543): Early generation auxiliary measurement unit for specialized drive frames.
- BCU-12 (3AUA0000110431): Control unit often used in conjunction with measurement modules.
- ZMU-02 (3AXD50000005741): Memory unit used for storing drive parameters and firmware.
- FDCO-01 (3AFE64420371): Optical branch-out module for connecting multiple measurement units.
- AINT-14C (3AFE64610811): Main interface board for high-power semiconductor stacks.
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