ASD 531

ASD 531

Design and function

ASD 531 – Small and simple

The ASD 531 is small, yet extremely powerful. As with the two larger models in the ASD range, it is also equipped with the tried-and-tested HD detector with LVSC (large-volume smoke chamber). Its outstanding sensitivity ensures high levels of safety, combined with an impressively long service life. The ASD 531 ignores individual disruptive factors effectively thanks to its patented lint filter.

The ASD 531 is the perfect choice for anyone wanting to put a smaller system into operation quickly and easily without the need for extra training. Configuration is made directly on the device using BasiConfig in just three simple steps without the need for a PC.

Operation of the compact device is just as easy. With the ASD 531, you can monitor your rooms and premises reliably and precisely with a minimum of effort and exceptional cost efficiency.

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Key Features

Key Features

  • ASD 531 - Aspirating smoke detector including 1 integrated smoke sensor, without smoke level indicator

ASD 531 – for small premises:

  • Compact design
  • Permissible temperature range: – 10 °C to + 55 °C
  • Maximum sampling pipe length: 75 m
  • Approvals: VdS, UL*, FM*



The ASD 531 is ideal for property and space surveillance thanks to its excellent response behaviour. Typical applications include:

Room surveillance

  • Electronic measuring rooms
  • Transformer rooms
  • Clean rooms
  • Elevator shafts
  • False ceilings
  • Ventilation ducts

Property surveillance

  • Telecommunication facilities
  • High and low-voltage distribution cabinets
  • Display cases
  • IT installations
  • CNC control systems

Modules & Accessories

Optional Modules & Accessories

Optional Modules:

  • RIM 36 - Optional module with 5 additional relays
  • SD Card - Industrial SD card
  • UMS 35 - Universal module support for mounting line modules
  • ASD PipeFlow - PC tool for drawing and calculating the sampling pipe


An extensive range of accessories are available (25 mm and ¾" sampling tube, sampling points, filters, water separators, etc.).

View the range of Securiton Pipes & Fittings that Patol offer alongside the ASD 531.

Technical Data


Technical Data

Supply voltage range EN 54
14.0-30 VDC
16.4-27 VDC
Power consumption Typical for 24 VDC 75 mA
Sampling tubes/smoke sensors Quantity 1
Alarm sensitivity Alarm
From 0.006%/m
Alarm levels   4 (3 pre-signals fixed in adv. 30/50/70%)
Autolearning, day/night switching   Not available
Relays 1-channel vers. 2 (1 alarm, 1 fault)
  2-channel vers. (use RIM 36 for pre-signals)
Interfaces O.C. outputs See relays
  PC tool -
  Network -
  Inputs Reset
Optional Modules Quantity 2
  Types RIM 36
Standards/approvals EN 54-20 VdS G 215 100
  EN 54-27 (ventil. ducts) Yes
  UL 268, FM 3230 Planned
  Other -
  Compliance EMC, CPR, RoHS
Number of campling apertures (with ASD PipeFlow) EN 54-20 Class A 6
  EN 54-20 Class B 8
  EN 54-20 Class C 12
  NFPA 72 (UL/FM) 12
Monitoring area Max. area 720 m2
System limits as per EN 54-20 Class C Max. quantity
Sampling apertures
  Max. length to last sampling point 40 m
  Max. overall length for all sampling tubes 75 m
System limits without conformity to standards Max. overall length for all sampling tubes -
Configuration Close operation BasiConfig
  PC tool -
Fan/sampling system Suction pressure > 100 Pa
  Service life (MTTF) > 80,000 h (at 40 °C)
  Performance levels 1
  Suction noise < 32 dB (A) (fan level 1)
  Soundproof housing < 20 dB (A)
Housing EN 60529 prot. category IP 54
  Dimensions (W x H x D) 195 x 290 x 140 mm
  Weight (approx.) 1950 g
  Cable entries 3 x M20, 1 x M25
Operating temperature/humidity Evaluation unit –20 – +55°C/95% RH
(amb. air max. +40 °C)
Display and Operation - Standard Per channel 1 «power» LED green, 1 red «alarm» LED, 1 yellow «fault» LED,
1 yellow soiling LED, 1 reset key
Display and Operation - Enhanced 10 LEDs (yellow) for smoke level indicator Not available
Event menory/analogue values On board 1000 events
  With SD card Up to 1 year
On-board slot for SD card