PS3500 diagnostic module monitors continuously the health and efficiency of PS3500 power supplies and primary side power conditions. The module provides real-time diagnostics with configurable warning and alarm levels and alerts maintenance and operations personnel to irregularities, faults and impending failures. This promotes proactive maintenance to help eliminate unexpected and expensive downtime. The diagnostic module is modular and hot-swappable and integrates easily into plant asset management systems through RS-485/HART, EDDL or FDT/DTM technologies. The power supplies are up to 91% efficient and feature a modular design with selectable wiring configurations, enabling them to be configured in N+1 or N+N redundant mode.