SPERRY MARINE 03956 884774 POWER SUPPLY

The Sperry Marine 03956-1884774 (often referred to by the shortened number 03956 884774) is a ruggedized Power Supply Unit (PSU) specifically designed for the VisionMaster FT series of marine radars and navigation systems.

Given your previous inquiries about the JK-series telephone exchange boards and the ABB diode unit, it appears you are working on a comprehensive refit or repair of a vessel’s bridge electronics or communication rack.

Technical Profile

• System Compatibility: Primarily used in the Sperry Marine VisionMaster FT Radar, Chart Radar, and ECDIS (Electronic Chart Display and Information System) workstations.

• Role: It acts as the primary power converter for the processor engine and display electronics. It is designed to handle the “dirty” power environments common on ships, providing stable DC output despite voltage fluctuations.

• Input/Output: Typically accepts a wide range of AC inputs (92–276V AC) and converts it to the specific DC rails required by the VisionMaster’s internal PC architecture and interface boards.

Integration with your other components

In a typical marine setup:

1. Sperry Marine PSU (03956): Powers the navigation and radar processing.

2. JK-Series Boards (.504 to .507): Handle the ship’s internal telephone and intercom communication.

3. ABB RQBA 040: Likely manages the power redundancy or isolation between these two systems to ensure that a failure in the phone system doesn’t “noise up” the radar display.