ABB RER133 Bus Connection Module

Description

Technical Specifications

• Product Type: RS-232 to RS-485 Signal Conversion & Bus Connection Module
• Host Compatibility: Exclusively for ABB RE_541, RE_543, RE_545 series protection relays (excludes REF 542 and REF 542plus)
• Signal Conversion: Bi-directional conversion between RS-232 and RS-485 electrical signal standards
• Supported Protocols: SPA, Modbus, DNP 3.0ABB Group
• Communication Baud Rate: Adjustable range from 300 bit/s to 19200 bit/sABB Group
• RS-485 Wiring Mode: Supports 2-wire and 4-wire connection configurations
• Bus Capacity: Standard RS-485 bus interface, supports daisy-chain connection of up to 32 node devices
• Power Supply: Powered directly by the RE_54_ host device (+15 V DC), no external power supply required
• Power Consumption: Typical ~1 W, Peak ~1.8 W
• Physical Dimensions:
  • Width: 95 mm
  • Height: 101 mm (105 mm with mounting bracket)
  • Depth: 30 mm (38 mm with mounting bracket)
• Weight: Approximately 290 g
• Environmental Ratings:
  • Operating Temperature: -10°C to +55°C
  • Storage Temperature: -40°C to +70°C
  • Humidity: 5–95% non-condensing
• Mechanical Construction: Compact module with terminal block connections and dedicated host interface cable
• Certifications: Complies with relevant EU EMC directives and industrial safety standards (CE marked)

Key Features

• Dedicated Host Compatibility:
  • Engineered solely for ABB RE_54_ series protection relays, ensuring plug-and-play compatibility and stable performanceABB Group.
  • Connects directly to the RS-232 port (X3.2) on the rear panel of the host device via a specialized cable.
• Versatile Signal Conversion:
  • Performs reliable bi-directional signal conversion between RS-232 and RS-485 interfaces.
  • Adheres fully to RS-485 electrical standards, ensuring robust long-distance communication.
• Flexible Communication Support:
  • Supports a wide range of baud rates (300–19200 bit/s) to match diverse system requirementsABB Group.
  • Integrates collision detection and avoidance mechanisms for baud rates of 4800, 9600, and 19200 bit/s, enhancing data transmission stabilityABB Group.
  • Accommodates multi-drop bus topologies with up to 32 connected devices, suitable for extensive industrial networks.
• Robust & Maintenance-Friendly Design:
  • Compact, lightweight form factor for easy side-mounting on RE_54_ series devices.
  • No requirement for an external power supply, simplifying installation and reducing wiring complexity.
  • Features terminal block connections for secure RS-485 bus wiring, supporting both 2-wire and 4-wire setups.
• Legacy System Stability:
  • Proven reliability for extending the communication capabilities of existing RE_54_ installations.
  • Enables legacy RE_54_ series relays to connect to modern SCADA and automation systems using standard RS-485 protocolsABB Group.

Application Scenarios

• Legacy Power Distribution Substations:
  • Primary application for upgrading communication infrastructure in existing substations equipped with ABB RE_541, RE_543, or RE_545 protection relays.
  • Facilitates connection of RE_54_ series relays to central SCADA systems via RS-485 based Modbus or DNP 3.0 networksABB Group.
  • Enables data acquisition, status monitoring, and remote control of medium-voltage feeder protection equipment.
• Industrial Power Systems:
  • Integration of RE_54_ series protection relays into factory automation and power management systems.
  • Reliable communication link for protection devices in industrial environments with high electromagnetic interference.
  • Supports multi-drop network architectures for connecting multiple protection relays across large industrial plants.
• Utility & Industrial Retrofit Projects:
  • Key component in modernization projects for aging power distribution systems, avoiding full replacement of functional RE_54_ protection hardware.
  • Extends the operational lifecycle of legacy substation equipment by providing standardized serial communication capabilities.
  • Ideal for maintenance and replacement scenarios in utilities and industrial facilities still operating RE_54_ series platforms.
• Serial Communication Network Expansion:
  • Constructing multi-node serial communication buses for centralized monitoring of distributed protection devices.
  • Enabling interoperability between RE_54_ series relays and third-party RTUs, PLCs, or HMI systems via RS-485.
  • Deploying cost-effective, long-distance communication links in various power and industrial automation topologies.