Description
Technical Specifications
| Parameter | Value |
| Manufacturer | ABB |
| Product ID / Part Number | 2VAA008425R1 (often designated as RMU610) |
| Product Type | Repeater Mounting Base Unit / Compact Bus Extender Base |
| Compatible Modules | ABB cRBX01 Compact Remote Bus Expander (supports single or redundant configuration) |
| System Family | ABB Symphony Plus Distributed Control System (DCS) — HN800 I/O Bus |
| Mounting Orientation | Horizontal row installation |
| Dimensions | Width: 90 mm, Height: 127 mm, Depth: 147 mm |
| Weight | ~634 g (including base mechanics) |
| Enclosure Protection | IP20 |
| Operating Temperature | -40 to +70°C |
| Storage Temperature | -40 to +85°C |
| Relative Humidity | 20% to 95% non-condensing at +40°C |
| Vibration & Shock | Operational Vibration: 5 to 60 Hz at 0.137 mm, 60 to 150 Hz at 1.0 G; Storage Shock: 15 G, 11 ms |
| Condition | New Original / Factory Sealed (verify availability upon inquiry) |
| Lead Time | Stock dependent; typically available for immediate dispatch or short sourcing windows |
| Warranty | 12-month standard industrial replacement warranty |
| Indicative Price | Price subject to market conditions; contact us for a firm quote |
Functional Overview
The ABB RMU610 (2VAA008425R1) is a specialized mounting base unit designed to host the cRBX01 fiber optic repeater module within ABB Symphony Plus distributed control system architectures. Functioning as the physical backbone for the HN800 remote I/O bus extension scheme, the RMU610 provides secure mechanical housing, power distribution, and backplane signal routing for remote bus expander cards.
When populated with cRBX01 modules (frequently deployed as part of the HRBX01K02 redundant kit), the assembly enables transparent, long-distance communication between main controllers and remote I/O racks over multi-mode fiber optic links. This configuration allows remote I/O drops to be positioned up to 3.0 km away from the central node without sacrificing determinism or system capacity.
Integration and Deployment Considerations
Bus Topology and Configuration
The RMU610 base supports point-to-point star topologies on the HN800 remote bus framework. Each remote link can handle up to 60 HN800 devices,
