Overview
The Deltabell E is a wired external sounder module for intruder alarm systems, providing both audible and visual alarm signalling in an IP65 weatherproof enclosure. Designed for Grade 3 security applications, it includes tamper protection, engineer hold‑off, an internal backup battery for SAB/SAC operation and a timer to comply with noise regulations.

• Audible & visual deterrent: piezo sounder with LED strobe and comfort LED.
• Weatherproof housing: dual‑skin polycarbonate enclosure, IP65 rated with sealed inner cover to protect the PCB.
• Tamper protection: front, rear and power tamper plus sealed inner cover tamper.
• Engineer facilities: on‑board engineer hold‑off with remote engineer hold‑off input.
• Battery backup: internal NiMH 7.2 V, 250 mAh battery for SAB/SAC operation and fault monitoring.
• Noise compliance: siren auto cuts off after 15 minutes; strobe continues until system reset.
• Installation: built‑in levelling (spirit level) and revolving guide holes simplify mounting.

Typical applications: external alarm signalling for domestic and commercial wired intruder alarm systems where Grade 3 security and weatherproofing are required.

Compliance & safety: Suitable for EN50131‑1 systems; Security Grade 3 (variant dependent). Environmental class IV. CE conformity indicated by manufacturer. Ensure installation is carried out by a competent installer and conform to local alarm regulations. Observe manufacturer installation instructions and battery handling guidance.