RMBA-01
Modbus Adapter Module - Modbus RTU RS-485 Drive Adapter
Lifecycle note: Use the unit nameplate and current ABB documentation as final references before approving a replacement.
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+86 15359408275Modbus Adapter Module - ABB Drives Fieldbus Adapter Series
ABB RMBA-01 is a Modbus RTU adapter module for connecting compatible ABB drives to an RS-485 multidrop network. The adapter gives the Modbus master access to mapped drive control, reference, status and parameter data.
The official RMBA-01 manual specifies shielded twisted-pair RS-485, up to 31 stations per segment plus a repeater, a maximum segment length of 1200 m and selectable rates from 600 to 19200 bit/s.
Commissioning requires matching the station address, baud rate, parity, register mapping, termination and drive communication parameters. Preserve the installed cable shield and grounding practice when replacing the module.
| Manufacturer | ABB |
|---|---|
| Model | RMBA-01 |
| Order number | RMBA-01 |
| Product type | Modbus RTU RS-485 Drive Adapter |
| System family | ABB Drives Fieldbus Adapter Series |
| Communication protocol | Modbus RTU |
| Physical interface | Shielded twisted-pair RS-485 |
| Topology | Multidrop; 31 stations per segment plus repeater |
| Maximum network stations | 247 including repeaters |
| Maximum segment length | 1200 m |
| Supported bit rates | 600, 1200, 2400, 4800, 9600 and 19200 bit/s |
| Current consumption | Maximum 140 mA at 5 V DC |
| Enclosure rating | IP20 |
| Dimensions | 95 × 62 × 34/20 mm |
ABB RMBA-01 is a modbus rtu rs-485 drive adapter used in the ABB Drives Fieldbus Adapter Series. The complete order number and installed hardware revision must be matched.
ABB RMBA-01 supports Modbus RTU communication over an RS-485 multidrop network for ABB drives. Confirm the project architecture, companion modules and remote-end equipment before replacement.
Check ABB RMBA-01 against the installed rack, slot, hardware revision, firmware, connectors, signal paths and approved project documentation.
Record the complete ABB RMBA-01 nameplate, module settings, cable destinations, channel allocation and engineering-file revision before removal.
Install ABB RMBA-01 only after isolating the equipment and verifying grounding, shielding, connector keys, rack position and all project-specific wiring.
Commission ABB RMBA-01 with the approved ABB and site procedure, then test communication paths, alarms, configured services and safe system response.
Do not infer interchangeability for ABB RMBA-01 from a nearby type code. Match the full order number, revision, interface and configured application.
Provide the complete ABB RMBA-01 label, serial and revision data, installed system, quantity, destination and clear photographs of every connector.
RMBA-01 User’s Manual 3AFE64498851 · ABB official product manual for this exact adapter model. Use current ABB documentation and the installed project records as final references.
Send the complete ABB model, order number, revision, quantity, destination and nameplate photo. We will verify identification details before confirming availability and lead time.
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