The RS485 repeaters from romutec provide reliable and flexible solutions for enhancing and optimizing RS485 two-wire bus systems. These devices are designed to amplify data signals, connect bus segments, and improve network stability. They enable the creation of complex network topologies, such as star topologies, and are cascadeable to achieve maximum spatial network extension.

Features

• Signal Amplification: Enhances amplitude, edge steepness, and signal width to improve bus system quality and range.
• Network Segment Coupling: Connects up to four network segments per repeater with a maximum segment length of 1200 meters.
• Star Topology: Ideal for applications requiring star-shaped cabling without additional reconstruction.
• Galvanic Isolation: All outputs are galvanically isolated for safe and interference-free communication (also available without isolation upon request).
• Cascadeability: Increases the number of participants and network extension.
• Half-Duplex Operation: Supports all RS485 two-wire bus systems, including Modbus RTU and BACnet MS/TP.

Technical Specifications

• Power Supply: 24 V AC/DC or 8–24 V AC/DC (depending on the model)
• Communication Interfaces: RS485, half-duplex operation
• Maximum Segment Length: 1200 meters
• Maximum Number of Participants: 255 devices
• Configuration: Dip switches for termination and data line swapping
• LED Indicators: Visualization of operational status and data communication
• Protection Class:
  • HSR-RS485-4: IP20 (DIN rail mounting)
  • FBR-RS485-4: IP66/IP67 (field mounting)
• Operating Temperature: 0 to 50 °C

Advantages

• Flexibility: Adaptable to different network conditions and communication protocols.
• Ease of Installation: Tool-free push-in terminals and intuitive dip switch configuration.
• Network Optimization: Reduces wiring requirements and extends network reach.
• Safety: Galvanic isolation protects devices and the network from interference.
• Compatible with all RS485 two-wire bus systems using single-master/multi-slave protocols.
• Supports coupling of network segments with varying interface settings.
• Compatible with RS485 bus systems with any data format.
• Galvanically isolated interfaces (standard), optionally available without isolation.
• Data line swapping via dip switch (available for models with galvanic isolation).
• Automatic baud rate detection (autobauding) in the range of 9600-115200 baud.
• Cascadeable.
• Available in DIN rail (HSR) and field (FBR) variants.

Applications

• Expansion and stabilization of Modbus RTU and BACnet MS/TP networks.
• Optimization of building cabling in case of installation errors.
• Creation of star topologies for larger networks.
• Ensuring communication in industrial and building technology applications.

Conclusion

The RS485 repeaters HSR-RS485-4 and FBR-RS485-4 are essential components for reliable and efficient network communication. With their high performance, ease of use, and flexible application possibilities, they offer a future-proof solution for modern building automation and industrial applications.