The Von Duprin 900-FA is a Fire Alarm Relay (EIR) module designed for compatible PS900 Series power supplies. It provides an emergency interface with an automatic fire alarm system and is used to cut power during an emergency condition. The module is available as an option for supported power supply configurations, including the Von Duprin PS914 and Schlage PS902, PS904, and PS906 power supplies. 

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Manufacturer: Von Duprin
Part Number: 900-FA
Product Name: Fire Alarm Relay (EIR) Module
Primary Function: Emergency interface with an automatic fire alarm system
Application: PS900 Series power supply systems
OEM Part: Yes
Warranty: 3-year limited (electronic), Limited lifetime (mechanical)