The Detex 100744-2 is the OEM circuit board for the EA (Exit Alarm) prep option on 48-inch Detex Advantex series exit devices. It mounts to the device on a Z bracket, which positions the board inside the housing at the correct angle and alignment for the alarm circuitry to interface with the crossbar mechanism. If your Advantex exit device has a failing or damaged EA circuit board, this is the exact replacement part for the 48-inch configuration.

Getting the right board for your device length matters. The 100744-2 is sized and calibrated specifically for the 48-inch (4-foot) Advantex device. It is not interchangeable with the circuit board for 36-inch devices, so confirm your device length before ordering. The EA option on Advantex devices is a hardwired alarm configuration that operates at 12/24VAC/VDC with a field-selectable 9VDC battery backup, so the board handles both the primary power connection and the backup logic.

What the EA Alarm Circuit Board Controls

The EA prep option adds a hardwired exit alarm function directly to the Advantex exit device. When the door opens without key disarm, the board triggers an approximately 100dB alarm at the device. Beyond the local alarm, the EA circuit board also supports remote signal output, which lets you connect to a remote horn, strobe light, or other security device that activates alongside the door alarm. That remote signal capability is one of the main reasons facilities and security integrators choose the EA option over a simple battery-operated alarm. It integrates into a larger building security system rather than operating in isolation at the door.

The Z bracket is the mounting component that physically holds the circuit board inside the device body. The board clips or fastens to this bracket before the assembly is seated in the device housing. If your existing Z bracket is also damaged, or if you're rebuilding from a salvaged housing, it's worth inspecting the bracket condition before installation to make sure the board seats properly and holds its position securely.

Who Needs This Part

Security technicians, facilities maintenance staff, and door hardware contractors working on Advantex exit devices with the EA option are the primary buyers. It also comes up in retrofit situations where a 48-inch Advantex device is being upgraded or reconfigured to include the exit alarm option, and the circuit board needs to be sourced separately from the device itself. Since the board handles the hardwired alarm function, any installation where the EA option has stopped working reliably should consider the circuit board as a likely failure point alongside the wiring connections.

Facilities that require building code compliance on alarmed exits, including schools, healthcare buildings, retail environments, and multi-tenant commercial properties, rely on Detex Advantex devices for their combination of durability and alarm function. Keeping the EA circuit board in working order is a direct compliance requirement for those applications.

Technical Specifications

• Part Number: 100744-2
• Brand: Detex
• Part Type: Circuit Board Only (board without housing or device body)
• Prep Option: EA (Exit Alarm, hardwired)
• Mounting: Z Bracket
• Compatible Device Length: 48-inch (4-foot) Advantex series
• Alarm Operation: 12/24VAC/VDC with field-selectable 9VDC battery backup
• Remote Signal Output: Supported (for horn, strobe, or external security device)

Related Parts and Compatible Series

If you're sourcing parts for a full Advantex device overhaul or need to confirm which other components work with this circuit board, our Detex Advantex parts diagrams give you a complete breakdown of the Advantex series with numbered diagrams for each sub-assembly. The Z bracket and circuit board assembly sits within the filler plate housing of the device, and diagrams help you verify position and orientation before installation.

For other exit alarm-related parts and accessories across brands, you can browse our full exit alarms parts catalog. If you need to cross-reference parts across different exit device types, the commercial exit devices section covers rim, surface vertical rod, concealed vertical rod, and mortise configurations from Von Duprin, Falcon, and Detex.

Why Order from Security Parts

We stock genuine Detex parts for the Advantex series and carry the related hardware to get your device back to spec in one order. If you need help confirming that the 100744-2 is the correct board for your specific device configuration, we can verify compatibility based on your device series and installation before you buy. We've been supplying commercial door hardware parts since 2001 and we know the Detex catalog in detail.