RELIANCE 705354-3A Fault Relay Board

RELIANCE 705354-3A Fault Relay Board is a vintage Reliance Electric fault-relay PC board designed to provide fault signaling within industrial control panels and legacy automation equipment; the part is cross-listed as 0-54379-10 and carries the identifiers 399 and 05437910, linking it to both Reliance Electric and RELIANCE legacy catalogs. This board functions as a dedicated fault-relay module that interfaces with control logic to indicate fault conditions and drive related interlocks or alarms, typically within drive systems or PLC-based control schemes. While specific electrical ratings and relay counts are not listed here, the device is described by manufacturers and distributors as a fault-relay PCB, intended for use in environments where reliable fault signaling is required to trigger downstream safety or shutdown actions. Common applications include legacy motor control centers and automation panels where multiple relays on a single board coordinate fault outputs for monitoring, interlocking, and alarm integration. The model designation and cross-reference numbers indicate it was deployed in older Reliance Electric or RELIANCE control architectures, making it a candidate for restoration or replacement in vintage systems that rely on fault signaling via dedicated relay boards. If compatibility with a specific controller or installation footprint is essential, verify the exact board layout and connector scheme against the original equipment documentation, ensuring that the 705354-3A/0-54379-10 references align with the target panel’s wiring harness and relay contact configuration.