Siemens FDA241 Cerberus PRO Aspirating Smoke Detector (ASD), up to 800 m²
The larger-area version of the FDA221, a dual wavelength aspirating smoke detector for business-critical rooms up to 800 m².

Dealer for SiemensA very early warning aspirating smoke detector with dual wavelength (blue and infrared) detection, for small business-critical rooms up to 500 m².
Standards and approvals: VdS, UKCA
| Specification | FDA221 |
|---|---|
| Operating voltage | DC 19…30 V |
| Operating current | 150 mA (nominal); 250 mA (in alarm) |
| Dimensions (W x H x D) | 155 x 280 x 114 mm |
| Sound level | High 33 dB, medium 30 dB, low 26 dB |
| Operating temperature | -20…60 °C |
| Relative humidity | 5...95% rel. (no condensation) |
| Pipe length | 30 m (single pipe length) 50m (total pipe length) |
| Air inlet pipe | Metric: 21 mm ID...25 mm OD |
| Relay outputs | 3x 2 A / 30 V |
| Alarm threshold | 0.14...2.0 % obs/m / info alarm, pre-alarm, fire 1 (5 sets) 6.0...20 % obs/m / fire 2 (5 sets) |
| Area coverage | Up to 500 m² |
| Display | 3 Alarm state indicators Fault indicators Smoke and airflow level Bargraphs |
| Communication protocol | FDnet/C-NET |
| Protection category | IP30 |
| Terminals | 0.2...2.5 mm² (30 - 12 AWG) |
Specifications as published by Siemens. Please confirm the exact model with us before ordering.
The larger-area version of the FDA221, a dual wavelength aspirating smoke detector for business-critical rooms up to 800 m².
A single chamber ASD+ aspirating detector for rooms up to 1600 m², or 800 m² at Class A, with app-based commissioning and replaceable modules.
A single chamber ASD+ aspirating detector for rooms up to 3000 m², or 1200 m² at Class A.
A dual chamber ASD+ that combines two independent smoke aspiration systems in one device, for rooms up to 3600 m², or 2000 m² at Class A.
The largest-area ASD+ in this range: two independent aspiration systems in one device, for rooms up to 6700 m², or 3000 m² at Class A.
An aspirating smoke detector that draws air from separate sampling points through microbore tubes, so it can pinpoint the location of a fire threat. It has three sensitivity settings and an IP40 enclosure.
A very early warning aspirating smoke detector for small, business-critical areas of less than 500 m2 (5,380 sq ft). It samples air continuously through a pipe network and detects very small amounts of smoke with light scattering.
An aspirating smoke detector with a built-in SLC module that communicates directly with Notifier panels over the SLC loop, offered in one-pipe and four-pipe models (VEP-A00-1P-NTF-VN, VEP-A00-P-NTF-VN and VEP-A10-P-NTF-VN).
An aspirating smoke detector with sector addressability for up to four sectors and a built-in SLC module for direct connection to Notifier panels (VES-A00-P-NTF-VN and VES-A10-P-NTF-VN).
An addressable reflector-type linear beam smoke detector that works on infra red light obscuration, for large open spaces such as warehouses and atriums. The combined transmitter and receiver connects directly to an analogue loop.
An intelligent reflector-type beam smoke detector that uses IR video imaging, for spacious rooms, open areas and high ceilings, with only one device to install and align.
Try "landing valve", "Apollo call point", "9 kg ABC" or a model code.
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