Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3BDZ000398R1 RLM01 |
| Manufacturer | ABB |
| Product Type | PROFIBUS Redundancy Link Module (RLM01) |
| System Compatibility | ABB Freelance, Symphony Plus, AC800 Series |
| Serial Interfaces | 3 ports (A, B, M) – RS 485 |
| Connection Type | 9-pin Sub-D connector |
| Transmission Rate | 9.6 kBit/s to 12 MBit/s (10 standard rates supported) |
| Electrical Isolation | Functional isolation per VDE 0110 |
| Test Voltage | 500 Veff |
| Data Telegram Delay (A/B → M) | 1 Bit time + 0.6 µs |
| Data Telegram Delay (M → A/B) | 4 Bit times + 0.6 µs |
| Operating Voltage | 24 VDC (+20 to +33 V) |
| Power Consumption | 150 mA typical at 24 V |
| Power Loss | Approx. 3.6 W |
| Operating Temperature | 0°C to 50°C |
| Storage/Transport Temperature | -30°C to 85°C |
| Relative Humidity | Max. 75% non-condensing |
| Alarm Contact | Opens in case of error, <60 VDC, max. 1A |
| Dimensions (H x W x D) | 134 x 56 x 70 mm |
| Weight | 330 g |
| Protection Class | IP20 |
| Mounting | 35 mm DIN rail |
| Certifications | CE, UL, CSA, Germanischer Lloyd (marine) |
Main Features and Advantages
Superior PROFIBUS Redundancy Management: The ABB 3BDZ000398R1 RLM01 acts as an active intelligent switch that provides transparent PROFIBUS configuration without requiring a slave address . When data arrives via line A or line B with the correct start of frame, it is forwarded to connection M. If data arrives simultaneously on both lines, either line A or B is selected at random. Should an error be detected on the active line, the ABB 3BDZ000398R1 RLM01 automatically switches to the alternate line, ensuring uninterrupted communication . This seamless failover mechanism is critical for maintaining process continuity in the event of cable damage, connector failure, or electromagnetic interference. Each ABB 3BDZ000398R1 RLM01 interface can support up to 31 PROFIBUS stations, with the ability to extend further using repeaters .
High-Speed Data Processing and Diagnostic Capabilities: The ABB 3BDZ000398R1 RLM01 delivers industry-leading low latency, with A/B to M delays of just 1 bit time plus 0.6 µs, and M to A/B delays of 4 bit times plus 0.6 µs . This ensures that even at the maximum PROFIBUS baud rate of 12 Mbps, the ABB 3BDZ000398R1 RLM01 introduces virtually no perceptible communication delay. The module features comprehensive diagnostic functions with error status indicated via front-panel LEDs and a dedicated signaling contact. Specific diagnostic messages can be read at the 8-pin terminal strip, enabling rapid fault identification and troubleshooting . The ABB 3BDZ000398R1 RLM01 also supports redundant power supply inputs, with monitoring logic verifying both voltage availability and reporting any malfunctions, further enhancing overall system reliability .
Robust Industrial Design and Global Certification: Engineered for demanding industrial environments, the ABB 3BDZ000398R1 RLM01 features an IP20-rated aluminum enclosure with a rugged DIN rail mounting mechanism . The module operates reliably across a wide ambient temperature range of 0°C to 50°C and can be safely stored from -30°C to 85°C . Its extensive certification portfolio includes CE for European compliance, UL and CSA for North American markets, and the prestigious Germanischer Lloyd Type Approval Certificate for marine applications, making the ABB 3BDZ000398R1 RLM01 suitable for installation in ships and offshore platforms . This comprehensive approval suite demonstrates the ABB 3BDZ000398R1 RLM01‘s suitability for the most demanding and safety-critical applications worldwide.
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