Flashing alarm annunciator units

programmable via USB, for front panel installation, 16 - 24 signal inputs

Type designation:

flashing alarm annunciator
16 - 24 signal inputs
redundant power supplies
and watchdog


Controls and displays

  • Bright 5mm LED display
  • Separate status indicator (green = Power ON)
  • Easily exchangeable label strips
  • Integrated functional buttons (+ external) + LED-test


  • Rear integrated Mini USB interface for parameterization using Windows 7 Pro or higher
  • Quiescent / operating current – for each signal
  • Running- / alarm – for each signal
  • Assignment of the outputs
  • Response delay variable for each signal, max. 10min
  • New alert / first alert

Electrical characteristics

  • Electrically isolated redundant power supplies 85-265V AC/DC
  • 16 - 24 signal inputs with LED-display red
  • Clocked input circuitry to reduce power loss at DC
  • Acknowledgeable flash warning
  • Integrated mini horn
  • EMC-values: UNITRO-Standard in accordance with EN 61000
  • Relay output: Change-over contact max. 5A 250V AC, 3A 30V DC

Mechanical characteristics

  • Compact plastic junction housing 144 x 96 x 85 + 25mm. Degree of protection: front IP50
  • Connection: Screw-type terminals, plug connection max. 2,5mm²


  • 8 Outputs, normally-open contacts with common ground (then max. 16 signal inputs)

Connection diagram FSB 24/16-24-P USB REDUNDANT

Technical data:

  • Type of construction:
    control board housing
    144 x 96 x 85 + 25mm
    (cutting for installation: 138 x 92 + 1mm)

  • Degree of protection:
    front IP50, rear IP20)

  • Weight:
    FSB 24/24 approx. 600g
    FSB 24/16 approx. 550g

  • Climatically conditions: 
    in accordance with UNITRO-Standard

  • Connection:
    screw-type terminals/ plug connection
    max. 2,5 mm²

  • Front panel buttons:
    acknowledge horn
    acknowledge flash light
    LED test

  • External button:
    acknowledge (normally open contact)

  • Supply voltage:
    power supply: 85-265V AC/DC
    redundant power supply: 85-265V AC/DC

  • Max. fuse:
    4A medium slow

  • Input level for signal inputs:
    110/125V DC ± 10% - 15% max. 2,5mA
    220V DC ± 10% - 15% max. 2mA
    voltage tolerance ±10%

  • Minimum signal duration:
    DC: 10ms / AC: 100ms
  • Power loss 100% ED:
    110V DC / 220V DC max. 5,9W
    clocked input circuitry
    to reduce power loss at DC

  • LED display:
    labeled with marking strips
    alarm new alert: red flash light
    alarm acknowledge: red steady light
    alarm removed: LED dark

    power LED U1:
    Power on green steady light,
    USB connected flashing

    power LED U2 REDUNDANT:
    Power on green steady light

  • Flashing frequencies:
    alarms 2Hz / 0,5Hz

  • Relay outputs:
    1x group alarm, 1x horn contact and
    1x watchdog
    potential-free change-over, max. 250V AC/ 30VDC 5A
    option: group alarm, 8 outputs normally-open
    with common ground, max. 250V AC/ 30VDC 5A

  • Parameterization:
    via rear Mini USB interface per input:
    - running- / alarm
    - quiescence- / operation current
    - switch on delay max. 10min
    - assignment of the output contacts

    - first up / new alert,
    - external acknowledge selection

  • Leakage distances and clearances: 
    in accordance with UNITRO-Standard

  • EMC, immunity of interference: 
    in accordance with EN 61000

subject to change