Simplex 742-406
Simplex 742-406
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The Simplex 742-406 is a replacement TrueAlarm addressable controller CPU board used in the Simplex 4009-9401 (4009T) notification appliance circuit (NAC) panel. It carries the addressable control and processing logic for the 4009T system, making it a board-level repair part for technicians servicing this panel family rather than a component for new system design. It is also cross-referenced under the alternate part number 565-990.
Key Features
- Direct replacement CPU/controller board for the Simplex 4009-9401 (4009T) NAC panel
- Carries the addressable control processing logic for the 4009T system
- Board-level part intended for field replacement of a failed or damaged controller board
Technical Specifications
- Compatible with the Simplex 4009-9401 (4009T) TrueAlarm/NAC panel
- Cross-referenced under alternate part number 565-990
Certifications
- Replacement part for use in UL-listed Simplex 4009T fire alarm notification panels
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