Description
The Littelfuse RS485MS-2W is a dedicated RS-485 communications module designed to enable Modbus communication capability on Littelfuse 77x-series protection relays. It allows these devices to interface with monitoring and control systems such as the RM-1000, RM-2000, PLCs, or other Modbus-compatible equipment, making it ideal for industrial automation and HVAC system integration.
This module converts internal signals into RS-485 communication levels and provides electrical isolation between the communication network and high-voltage equipment, helping improve system safety and reliability. It supports long-distance data transmission over RS-485 networks and enables multiple devices to communicate on a single bus.
Built for rugged environments, the RS485MS-2W features optical isolation, surge protection, and a compact design for easy installation directly onto compatible relay communication ports.
Key Features:
- Enables Modbus RS-485 communication for 77x-series relays
- Provides electrical (optical) isolation from high-voltage systems
- Supports long-distance, multi-device RS-485 network communication
- RS-485 compliant bus drive capability
- Powered directly by the connected relay device
- Remote reset input connection capability
- Compact design for direct mounting to communication port
- Surge protection for improved durability
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