Haes SNDEXT-4 Conventional Sounder Expander Card

The Haes SNDEXT-4 Conventional Sounder Expander Card is designed to expand the sounder circuit capacity of compatible conventional fire alarm control panels.

Using an existing sounder circuit as its trigger, the SNDEXT-4 provides four monitored and fused sounder circuits, making it a practical solution for installations requiring additional sounder outputs without replacing the main control panel.

The card supports either common triggering across all circuits or individual circuit activation via switched negative inputs, offering flexible configuration for a range of fire alarm applications.

A fault relay is included for remote fault monitoring, with fault indication covering issues such as loss of the 24V supply input.

Suitable for use with Haes panels and other compatible conventional fire alarm systems, the SNDEXT-4 provides a straightforward expansion option where additional monitored sounder circuits are required.

• 4-way monitored sounder circuit expansion card

• Adds additional sounder circuit capacity to conventional fire alarm panels

• Universal compatibility with standard conventional fire alarm panels

• Uses an existing sounder circuit as a trigger

• Four monitored and fused sounder circuits

• Common or individual circuit triggering

• Remote fault monitoring relay included

• Fault indication for supply loss and circuit faults

• Self-healing fused outputs

• 28V DC supply input required

• End of line monitoring resistor included