Eaton Transformer Relay ETR-4000-2A3BA1 - RS485

Removable terminals and projection mounting simplify installation and field service, reducing commissioning time and human error. In critical environments, this design translates to faster changeouts and safer wiring, with fewer loose connections. Eight digital inputs and nine digital outputs provide flexible I/O for status signaling, control, metering, and fault annunciation. The business impact is clearer visibility into transformer health and faster decision-making, especially when integrated with SCADA via RS485 Modbus RTU or DNP3 RTU. Communications via Modbus RTU or DNP3 RTU over RS485 enable seamless, vendor-agnostic integration with existing protection schemes. This reduces integration risk and enables remote monitoring and diagnostics, improving uptime and reducing service visits. A wide power supply range supports global deployments and helps minimize inventory by covering multiple regional standards. Sensing inputs include Current Protection and Metering and Differential Protection, with Zone Selective Interlocking for coordinated tripping. This combination improves selectivity, limits outage impact, and supports modern protection schemes. URTD Interface, Trip Coil Monitor, IRIG-B options and other I/O features add resilience for mission-critical applications in substations and OEM equipment. The I/O architecture is designed for modular upgrades and easy retrofits while maintaining compatibility with existing ETR-4000 base relays.