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AB121LDA Alarm Horn Sounder & LED Beacon 2-31-270

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The AB121LDA combines a compact high output 126dB(A) alarm sounder with a powerful multi-function L.E.D. beacon. Featuring 64 alarm tone frequencies and 4 remotely activated stages/channels.
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Voltage
Back box/cable entries
Stopping plug material
Equip. tag/Duty label
Product version
Product option
Enclosure
Lens colour
Part Number:
AB121LDA
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Alarm Horn Sounder & LED Beacon

Upgraded Product:

  • New enhanced version
  • 64 alarm tones
  • 4 remotely activated alarm stages
  • Low in-rush electronics
  • Auto-synchronised horn and beacon
  • Pluggable, duplicated cable terminals
  • Dual cable entries with stopping plugs

Description

The low current consumption and high SPL in a robust fire retardant enclosure ensure the AB121LDA is suitable for all general signalling applications. The alarm horn sounder & LED beacon may be connected from a single or separate supplies for simultaneous or independent operation. The DC voltage versions feature 6 user selectable synchronised flash modes including rotating, flashing and steady. An alternative second and third stage beacon mode can be remotely activated (as can alternative alarm tones on the horn sounder) enabling an audible and visual communication of a three stage alarm condition.

Downloads

Datasheet Datasheet.pdf
Installation Manual D128-01-201-IS_Issue_1__AB121LDA_.pdf
Russian EAC Declaration of Conformity D-GB.GA05.B.12595-20-24.03.2025.pdf
Russian Maritime register 19.00193.278.pdf
Declaration of Conformity DC-027_Issue_F_Spectralarm.pdf
2D drawing (PDF) D128-05-001_Issue_1.pdf
2D drawing (DWG) D128-05-001_Issue_1.DWG
3D drawing (STEP) D128-05-001-3D_Issue_A.STEP
Wiring Schematic D118-06-501_Issue_1.pdf

Features

  • Automatic synchronisation on multi-sounder system
  • Synchronised flash rates
  • Continuously rated
  • Stainless steel fixings
  • Unit can be mounted using external lugs or internal fixing positions
  • Dual M20 or 1/2"NPT clearance cable entries
  • Duplicate pluggable cable terminations – Class A
  • Diode polarized for use in supervised circuits
  • 64 alarm tone frequencies and 4 remotely activated alarm stages
  • Available with custom tone configurations and frequencies
  • 6 LED beacon modes including rotating and steady functions
  • DC voltage units feature 3 remotely activated beacon mode stages
  • Can be mounted in any orientation

Specification

Alarm Horn:
Maximum output: High power level: 124dB(A) @ 1 m ±3dB
[115dB(A) @ 10ft/3m ±3dB]
Default power level: 121dB(A) @ 1 m ±3dB
[112dB(A) @ 10ft/3m ±3dB]
Nominal output: High power level: 121dB(A) @ 1m ±3dB
[112dB(A) @ 10ft/3m ±3dB]
Default power level: 118dB(A) @ 1m ±3dB
[109dB(A) @ 10ft/3m ±3dB]
No. of tones: 64 (UKOOA / PFEER compliant)
No. of stages: 4
Volume control: Full range to 0dB(A)
Effective range: High power level: 323m/1062ft @ 1KHz
Default power level: 221m/726ft @ 1KHz
In rush: 815mA within 4.0ms @ 24Vdc
Stage switching: Negative (common positive)
LED Beacon:
Light source: Array of 32 multi-function high power LEDs
Operating modes: 4 rotating configurations
4 flashing configurations
Steady mode for indicator / status applications
Peak/Effective Intensity cd: 30 cd* – measured ref. to I.E.S.
No. of stages: DC unit also features a remotely selectable
2nd and 3rd stage flash pattern.
LED/lens colours: Amber, Blue, Clear (white LEDs),
Green, Red & Yellow
General:
Ingress protection: IP65
Enclosure: High impact UL94 V0 & 5VA FR ABS/PC
Lens colour filter: Field replaceable UV stable PC
Terminals: 0.5 – 2.5mm² (20-14 AWG)
Line monitoring: Diode polarized for use in supervised circuits
Operating: -40 to +66°C [-40° to +151°F]
Storage: -40 to +70°C [-40° to +158°F]
Relative humidity: 95% at 20°C [68°F]
Weight DC: 2.30kg / 5.06Ibs
Weight AC: 2.90kg / 6.39Ibs

Current Consumption

Product Version: Nominal Voltage: Voltage Range: Beacon Current: Horn
Default Power Level
Current:		 Horn
High Power Level
Current:
DC024 24Vdc
48Vdc		 10-50Vdc 400mA
400mA		 430mA
223mA		 930mA
453mA
AC115 115Vac 103.5-126.5Vac 50/60Hz 140mA 173mA 340mA
AC230 230Vac 207-253Vac 50/60Hz 70mA 105mA 212mA

Part Codes

Variable: Identifier: Description:
Product type: AB121LDA Combined alarm horn sounder & LED beacon
Voltage: DC024
AC115
AC230		 24Vdc (10-50Vdc)
115Vac 50/60Hz
230Vac 50/60Hz
Back box/cable entries: [e] A Back box with mounting lugs – 2 x M20, 1/2"NPT clearance
Stopping plug material: [m] A ABS
Equip. tag/Duty label: [s] 0
1
2		 No equip. tag or Duty label
316 (A4) St/St Equip. tag/Duty label
Metalised Polyester Equip. tag/Duty label
Product version:
[v]		 A RMRS, EAC, CE, UKCA
Product option:
[o]		 1
Z
X
Y		 Standard product
Custom alarm tone software – contact E2S
Custom configuration – contact E2S
Stage control Config. 4 or 8
Enclosure colour: [x] G
R
S		 Grey
Red
Special colour – contact E2S
Lens colour: [y] A
B
C
G
M
R
Y		 Amber
Blue
Clear
Green
Magenta
Red
Yellow
Alarm stage control:
Please review the installation manual and wiring schematics for remote stage control and EOL resistor monitoring configuration options:
Config. 1 or 5 [DC]: Factory default. Common negative, positive switching. Up to 4 Alarm Stages. EOL monitoring Alarm Stage 1 only
Config. 2 or 6 [DC]: User setting. Common positive, negative switching. Up to 4 Alarm Stages. EOL monitoring Alarm Stage 1 only
Config. 3 or 7 [DC]: User setting. Common negative, positive switching activation of Alarm Stages 1 & 2 with EOL on both stages. Reverse polarity monitoring
Config. 4 or 8 [DC]: Product option ‘Y’. Independent activation of Alarm Stages 1 & 2 with EOL on both stages. Forward polarity monitoring
Config. 9 or 10 [AC]: Factory default. Up to 4 Alarm Stages. Stage 1 activated at power on. Stages 2, 3 and 4 via volt free contacts

Approvals

  • UKCA
  • CE
  • EAC: CU TR 04/2011 CU TR 20/2011
  • Russian Marine Register of Shipping

Multi-function patterns

Mode: Stage 1 Stage2 [DC only] Stage3 [DC only]
1 All L.E.D’s on Alternate Side Flash 2Hz Double Strike Flash 2Hz
2 Rotating: Slow1 Alternate Side Flash 2Hz All L.E.D’s on
3 Single Strike Flash 2Hz Rotating: Fast 2 All L.E.D’s on
4 Rotating: Fast 1 Single Strike Flash 2Hz All L.E.D’s on
5 Rotating: Slow 2 Double Strike Flash 1Hz All L.E.D’s on
6 Double Strike Flash 2Hz Rotating: Fast 2 All L.E.D’s on
7 Rotating: Fast 2 Double Strike Flash 2Hz All L.E.D’s on
8 Double Strike Flash 1Hz Alternate Side Flash 2Hz All L.E.D’s on
9 Alternate Side Flash 2Hz Rotating: Fast 2 All L.E.D’s on

Tone Table

Stage 1 WAV file Frequency Description. Stage 2 Stage 3 Stage 4
T 1 1000 Continuous – PFEER Toxic Gas Any T 2 T 44
T 2 1200/500 @ 1Hz Sweeping – DIN / PFEER P.T.A.P. Any T 3 T 44
T 3 1000 @ 0.5Hz (1s on, 1s off) Intermittent – PFEER Gen. Alarm Any T 2 T 44
T 4 1.4KH-1.6KHz 1s, 1.6KHz-1.4KHz 0.5s – NF C 48-265 Any T 24 T 1
T 5 544(100mS)/440 (400mS) – NF S 32-001 Any T 19 T 1
T 6 1500/500 – (0.5s on , 0.5s off) x3 + 1s gap – AS4428 Any T 44 T 1
T 7 500-1500Hz Sweeping 2 sec on 1 sec off – AS4428 Any T 44 T 1
T 8 500/1200Hz @ 0.26Hz(3.3s on, 0.5s off) – NEN 2575 Any T 24 T 35
T 9 1000 (1s on, 1s off)x7 + (7s on, 1s off) – IMO Code 1a Any T 34 T 1
T 10 1000 (1s on, 1s off)x7 + (7s on, 1s off) – IMO Code 1a Any T 34 T 1
T 11 420(0.5s on, 0.5s off)x3 + 1s gap – ISO 8201 Temporal Any T 1 T 8
T 12 1000(0.5s on, 0.5s off)x3 + 1s gap – ISO 8201 Temporal Any T 1 T 8
T 13 422/775 – (0.85 on, 0.5 off) x3 + 1s gap – NFPA Temporal Any T 1 T 8
T 14 1000/2000 @ 1Hz – Singapore Any T 3 T 35
T 15 300 Continuous Any T 24 T 35
T 16 440 Continuous Any T 24 T 35
T 17 470 Continuous Any T 24 T 35
T 18 500 Continuous – IMO code 2 (Low) Any T 24 T 35
T 19 554 Continuous Any T 24 T 35
T 20 660 Continuous Any T 24 T 35
T 21 800 Continuous – IMO code 2 (High) Any T 24 T 35
T 22 1200 Continuous Any T 24 T 35
T 23 2000 Continuous Any T 3 T 35
T 24 2400 Continuous Any T 20 T 35
T 25 440 @ 0.83Hz (0.60s on, 0.60s off) Intermittent Any T 44 T 8
T 26 470 @ 0.9Hz (0.55s on, 0.55s off) Intermittent Any T 44 T 8
T 27 470 @ 5Hz (0.10s on, 0.10s off) Intermittent Any T 44 T 8
T 28 544 @ 1.14Hz (0.43s on, 0.44s off) Intermittent Any T 24 T 8
T 29 655 @ 0.875Hz (0.57s on, 0.57s off) Intermittent Any T 44 T 8
T 30 660 @ 0.28Hz (1.80s on, 1.80s off) Intermittent Any T 24 T 8
T 31 660 @ 3.3Hz (0.15s on, 0.15s off) Intermittent Any T 24 T 8
T 32 745 @ 1Hz (0.50s on, 0.50s off) Intermittent Any T 24 T 8
T 33 800 (0.25s on, 1.00s off) Intermittent Any T 24 T 8
T 34 800 @ 2Hz (0.25s on, 0.25s off) – IMO code 3.a (High) Any T 24 T 8
T 35 1000 @ 1Hz (0.50s on, 0.50s off) Intermittent Any T 24 T 8
T 36 2400 @ 1Hz (0.50s on, 0.50s off) Intermittent Any T 24 T 8
T 37 2900 @ 5Hz (0.10s on, 0.10s off) Intermittent Any T 24 T 8
T 38 363/518 @ 1Hz (0.50s / 0.50s) Alternating Any T 8 T 19
T 39 450/500 @ 2Hz (0.25s / 0.25s) Alternating Any T 8 T 19
T 40 554/440 @ 1Hz (0.50s / 0.50s) Alternating Any T 24 T 19
T 41 554/440 @ 0.65Hz (0.76s / 0.76s) Alternating Any T 8 T 19
T 42 561/760 @ 0.83Hz (0.60s / 0.60s) Alternating Any T 8 T 19
T 43 780/600 @ 0.96Hz (0.52s / 0.52s) Alternating Any T 8 T 19
T 44 800/1000 @ 2Hz (0.25s / 0.25s) Alternating Any T 24 T 19
T 45 970/800 @ 2Hz (0.25s / 0.25s) Alternating Any T 8 T 19
T 46 800/1000 @ 0.875Hz (0.57s / 0.57s) Alternating Any T 24 T 19
T 47 2400/2900 @ 2Hz (0.25s / 0.25s) Alternating Any T 24 T 19
T 48 500/1200 @ 0.3Hz (1.67s / 1.67s) Sweeping Any T 24 T 12
T 49 560/1055 @ 0.18Hz (2.73s / 2.73s) Sweeping Any T 24 T 12
T 50 560/1055 @ 3.3Hz (0.15s / 0.15s) Sweeping Any T 24 T 12
T 51 600/1250 @ 0.125Hz (4s / 4s) Sweeping Any T 24 T 12
T 52 660/1200 @ 1Hz (0.50s / 0.50s) Sweeping Any T 24 T 12
T 53 800/1000 @ 1Hz (0.50s / 0.50s) Sweeping Any T 24 T 12
T 54 800/1000 @ 7Hz (0.07s / 0.07s) Sweeping Any T 24 T 12
T 55 800/1000 @ 50Hz (0.01s / 0.01s) Sweeping Any T 24 T 12
T 56 2400/2900 @ 7Hz (0.07s / 0.07s) Sweeping Any T 24 T 12
T 57 2400/2900 @ 1Hz (0.50s / 0.50s) Sweeping Any T 24 T 12
T 58 2400/2900 @ 50Hz (0.01s / 0.01s) Sweeping Any T 24 T 12
T 59 2500/3000 @ 2Hz (0.25s / 0.25s) Sweeping Any T 24 T 12
T 60 2500/3000 @ 7.7Hz (0.65s / 0.65s) Sweeping Any T 24 T 12
T 61 800Hz Motor Siren Any T 24 T 12
T 62 1200Hz Motor Siren Any T 24 T 12
T 63 2400Hz Motor Siren Any T 24 T 12
T 64 Simulated Bell Any T 21 T 12
For Stage 2 any Stage 1 alarm tone sound can be selected.
Country specific or custom tone configurations and alarm frequencies are available upon request.

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