Simplex 477-824. PAM-SD Fire Alarm Relay.

The Simplex 477-824 PAM-SD Fire Alarm Relay is a compact, high-performance relay module designed to provide reliable control and monitoring functions within fire alarm and detection systems. This relay allows fire alarm control panels to interface with auxiliary equipment such as door holders, HVAC systems, elevators, and notification appliances, ensuring coordinated response during emergency events.

Built for durability and flexibility, the 477-824 PAM-SD is ideal for a wide range of applications where electrical isolation and remote control are essential. It is designed for easy installation, dependable operation, and compatibility with both conventional and addressable fire alarm systems.

Features and Benefits

The Simplex 477-824 PAM-SD Fire Alarm Relay offers several features that enhance system reliability and performance:

• Compact design allows installation in tight spaces or electrical boxes.

• LED indicator provides visual confirmation of relay status during operation or testing.

• Versatile application for controlling auxiliary devices such as dampers, door holders, or local alarms.

• Plug-in terminal connections simplify wiring and reduce installation time.

• High-quality components ensure long-term reliability and consistent performance.

• Low current draw for efficient integration with various fire alarm control panels.

• Durable construction provides stable operation under a wide range of environmental conditions.

Together, these features make the 477-824 PAM-SD a trusted relay solution for professional fire alarm installations.

Applications

The Simplex 477-824 PAM-SD is suitable for a variety of life safety and building automation applications, including:

• Fire alarm system interfacing and control

• Door release mechanisms and magnetic holders

• HVAC and smoke control integration

• Elevator recall systems

• Notification appliance supervision

• Auxiliary system activation or shutdown

By integrating the PAM-SD relay into these systems, installers can ensure coordinated safety responses and enhanced operational control.

Installation and Maintenance

The PAM-SD relay is designed for easy setup, featuring clearly marked terminals and a compact form factor for flexible mounting. Its built-in LED indicator aids in diagnostics and verification during installation and maintenance. Routine inspection ensures continued reliability and compliance with fire protection standards.