ABB RMBA-01 Modbus RTU Adapter Module – ACS800/550 Fieldbus – New Original

Product Overview

Original ABB RMBA-01 Modbus RTU adapter module for ACS800 and ACS550 series drives. Provides galvanically isolated RS-485 interface for Modbus RTU communication. Maps drive parameters and data sets to 4xxxx holding register area for seamless integration with Modicon PLCs and other automation devices. Supports baud rates from 1200 to 115200 bps.

Key Features

• Genuine ABB original – for ACS800 and ACS550 series drives
• Modbus RTU adapter – galvanically isolated RS-485 interface
• Drive parameters mapped to 4xxxx holding registers
• Supports Modbus RTU protocol only
• Baud rate: 1200 – 115200 bps (configurable)
• Built-in termination resistor (active, requires module power)
• Compact design – ~0.05 kg
• New original – factory sealed

Specifications

Compatibility Note

• Compatible with ACS800 and ACS550 series drives
• Install in drive’s option slot
• Requires drive parameter configuration (Group 52 for Modbus settings)
• Supports 2-wire or 3-wire RS-485 connections (3-wire recommended)
• Built-in termination resistor for end-of-line nodes (must be powered)
• Verify drive model and hardware version before ordering

Quality Assurance

• New original – factory sealed packaging
• Actual photos sent before shipping
• Test video available upon request
• ESD anti-static packaging