The HUSD-15B Series is a Form C (SPDT), dual button hold-up switch that is designed to generate an alarm condition only when both buttons are pressed simultaneously, thus preventing accidental triggering.
The housing of this series is specially designed with a status window, red (alarm) and blue (armed), to verify the switch condition. The housing mounting screw is concealed to provide additional tampering protection. The built-in UL approved microswitch design generates an alarm condition when the cover is removed or damaged. The terminal strip consists of three wire ports that provide a firm and secure wiring installation.
The HUSD-15BM is designed for momentary operation.

Features:

• Dual button activation to eliminate accidental triggering
• SPDT transfer contact for supervised loop
• Terminal strip with three wire terminals
• Tamper protected switch mechanism using UL listed microswitch
• Concealed mounting screw
• Status window indicator
• White plastic case housing
• Momentary button, auto-reset

The HUS-7A is a single button, latching hold-up switch designed to provide a rapid signal to alarm systems. It is activated by pressing down the single button switch.
A status window indicates the condition of the switch: RED (alarmed), BLUE (armed).
A U-shaped key is supplied to reset the HUS-7A.
The hold-up switch sends a signal to a dedicated 24 hour hold-up circuit of a burglar control panel.

Features:

• Form C contact
• U-shaped key reset
• Status window indicator