Product Description
The ABB RLM01 PROFIBUS Redundancy Link Module (3BDZ000398R1) ensures uninterrupted and secure data transmission across PROFIBUS-DP networks. Designed for high-availability environments, it intelligently converts a single bus line into two redundant segments, maintaining communication even during cable or node failures.
It seamlessly integrates into ABB 800xA control systems and supports transmission rates up to 12 Mbit/s. Moreover, its compact DIN-rail housing and plug-and-play design make installation straightforward without extra configuration tools.
Key Specifications Overview
| Parameter | Description |
|---|---|
| Product ID | 3BDZ000398R1 |
| Model | RLM01 |
| Protocol | PROFIBUS-DP |
| Transmission Rate | 9.6 kbit/s – 12 Mbit/s |
| Interface Type | RS-485, 9-pin Sub-D |
| Power Supply | 24 V DC (20–33 V) |
| Power Consumption | 150 mA typical / 3.6 W loss |
| Isolation Voltage | 500 V eff |
| Mounting | 35 mm DIN rail |
| Protection Class | IP20 |
| Weight | 0.46 kg |
Functional Advantages
The RLM01 acts as an active, intelligent switch, managing redundant paths transparently within the PROFIBUS-DP system. It monitors both channels continuously, ensuring reliable operation even under network disturbances.
Key Benefits:
- Automatic conversion between single and dual PROFIBUS channels.
- Fully transparent to PROFIBUS configuration—no slave address needed.
- Built-in diagnostics with LED indicators and alarm relay output.
- High-speed communication up to 12 Mbit/s for modern automation systems.
- Electrical isolation and certified compliance with CE, UL, CSA, and GL standards.
- Operates within 0 °C – 50 °C for industrial and marine applications.
In addition, the module maintains excellent signal integrity through real-time amplification and bit-level delay management, ensuring stable data flow between controllers and field devices.
Technical Characteristics
| Specification | Value |
|---|---|
| Signal Delay (A/B → M) | 1 bit time + 0.6 µs |
| Signal Delay (M → A/B) | 4 bit times + 0.6 µs |
| Operating Voltage | 24 V DC (20–33 V) |
| Humidity | ≤ 75% (non-condensing) |
| Alarm Contact | < 60 V DC / max 1 A |
| Temperature Range | Storage –30 °C to +85 °C |
| Compliance | VDE 0110 / CE / UL / CSA / GL Marine (Cat. A–D) |
Therefore, the RLM01 provides both electrical safety and communication redundancy, making it suitable for continuous operation in mission-critical control networks.
Application Scenarios
The ABB RLM01 module is widely used in redundant network topologies where system uptime is essential. It allows standard PROFIBUS devices to participate in dual-line configurations without additional hardware changes.
Common Integration Use-Cases:
- Redundant PROFIBUS links in ABB 800xA and S900 I/O systems.
- Marine automation where certified, vibration-resistant modules are required.
- Process industries such as oil & gas, power generation, and chemical manufacturing.
- OEM solutions demanding fast installation and long-term reliability.
Furthermore, its compact form factor supports scalable network expansion and simplifies retrofitting in existing plants.
Details
| Weight | 0.33 kg |
|---|---|
| Dimensions | 3404 × 1422 × 1778 mm |
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