Scantronic Wireless External Bell Box Siren (No Cover) | SDR-2R-EXT-NC

The Scantronic SDR-2R-EXT-NC Wireless External Bell Box Siren (No Cover) is a high-performance external warning device designed for use with Scantronic wireless intruder alarm systems. Supplied without an outer cover, this unit is ideal as a replacement siren module or for pairing with a compatible Scantronic external sounder cover.

Utilising Scantronic Secure Radio (SSR) technology, the SDR-2R-EXT-NC provides cybersecure, bidirectional wireless communication, enabling over-the-air firmware updates and rapid, reliable event notification. This advanced communication protocol ensures system integrity and long-term future compatibility.

Delivering a powerful 100 dB(A) siren output at 1 metre, the unit provides a strong visual and audible deterrent. It features configurable cut-off timer options (5 seconds, 3 minutes, or 15 minutes) and is powered by four CR123A lithium batteries, offering a typical battery life of up to 3 years in SSR mode.

Built for external use, the siren operates reliably in harsh conditions with an IP55 rating and a wide operating temperature range, making it suitable for residential and commercial installations.

Please Note: This unit is the replacement for the Scantronic Radio External Sounder Blue Lense SDR-REXT-G2-BL-NC

Features

• Wireless External Bell Box Siren – Supplied without cover
• Scantronic Secure Radio (SSR) – Cybersecure, bidirectional communication
• Over-the-Air Updates – Future-proof system support
• 100 dB(A) Siren Output – Powerful audible deterrent
• Configurable Cut-Off Timer – 5 seconds, 3 minutes, or 15 minutes
• Long Battery Life – Up to 3 years in SSR mode
• Robust Outdoor Performance – IP55 rated for external use
• Wide Temperature Range – Reliable operation in all conditions

Technical Specification

• Product Code: SDR-2R-EXT-NC
• Product Type: Wireless external bell box siren (no cover)
• Communication: Scantronic Secure Radio (SSR)
• Sound Output: 100 dB(A) @ 1 metre
• Power Supply: 4 × CR123A lithium batteries (3V DC)
• Typical Battery Life: Up to 3 years (SSR mode)
• Current Consumption:
• Quiescent: 4μA
• Maximum: 125mA
• Cut-Off Timer Options: 5 seconds / 3 minutes / 15 minutes
• IP Rating: IP55
• Operating Temperature: -25°C to +60°C
• Weight: 900g (with batteries)

Dimensions

• Height: 285mm
• Width: 277mm
• Depth: 61mm
• Manufacturer: Scantronic