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

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	/system/1/assets/files/000/000/405/405/214ccf82a/original/TF037.WAV	1000 Continuous – PFEER Toxic Gas	Any	T 2	T 44
T 2	/system/1/assets/files/000/000/386/386/ceb4e488c/original/TF009.WAV	1200/500 @ 1Hz Sweeping – DIN / PFEER P.T.A.P.	Any	T 3	T 44
T 3	/system/1/assets/files/000/000/412/412/fa8b418f9/original/TF045.WAV	1000 @ 0.5Hz (1s on, 1s off) Intermittent – PFEER Gen. Alarm	Any	T 2	T 44
T 4	/system/1/assets/files/000/000/383/383/11797b764/original/TF019.WAV	1.4KH-1.6KHz 1s, 1.6KHz-1.4KHz 0.5s – NF C 48-265	Any	T 24	T 1
T 5	/system/1/assets/files/000/000/382/382/2c2978b6a/original/TF017.WAV	544(100mS)/440 (400mS) – NF S 32-001	Any	T 19	T 1
T 6	/system/1/assets/files/000/000/947/947/8f040484a/original/TF053.wav	1500/500 – (0.5s on , 0.5s off) x3 + 1s gap – AS4428	Any	T 44	T 1
T 7	/system/1/assets/files/000/000/944/944/890010fd0/original/TF054.wav	500-1500Hz Sweeping 2 sec on 1 sec off – AS4428	Any	T 44	T 1
T 8	/system/1/assets/files/000/000/417/417/abf396de0/original/TF003.WAV	500/1200Hz @ 0.26Hz(3.3s on, 0.5s off) – NEN 2575	Any	T 24	T 35
T 9	/system/1/assets/files/000/000/953/953/5deedc543/original/TF055.wav	1000 (1s on, 1s off)x7 + (7s on, 1s off) – IMO Code 1a	Any	T 34	T 1
T 10	/system/1/assets/files/000/000/952/952/3a041fde3/original/TF056.wav	1000 (1s on, 1s off)x7 + (7s on, 1s off) – IMO Code 1a	Any	T 34	T 1
T 11	/system/1/assets/files/000/000/946/946/761de34c6/original/TF057.wav	420(0.5s on, 0.5s off)x3 + 1s gap – ISO 8201 Temporal	Any	T 1	T 8
T 12	/system/1/assets/files/000/000/945/945/689d9405a/original/TF058.wav	1000(0.5s on, 0.5s off)x3 + 1s gap – ISO 8201 Temporal	Any	T 1	T 8
T 13	/system/1/assets/files/000/000/950/950/2d337d14e/original/TF059.wav	422/775 – (0.85 on, 0.5 off) x3 + 1s gap – NFPA Temporal	Any	T 1	T 8
T 14	/system/1/assets/files/000/000/399/399/84b54dafb/original/TF034.WAV	1000/2000 @ 1Hz – Singapore	Any	T 3	T 35
T 15	/system/1/assets/files/000/000/393/393/744c6f53f/original/TF030.WAV	300 Continuous	Any	T 24	T 35
T 16	/system/1/assets/files/000/000/391/391/5f7a58b54/original/TF028.WAV	440 Continuous	Any	T 24	T 35
T 17	/system/1/assets/files/000/000/948/948/c697b364a/original/TF060.wav	470 Continuous	Any	T 24	T 35
T 18	/system/1/assets/files/000/000/949/949/7e429e658/original/TF061.wav	500 Continuous – IMO code 2 (Low)	Any	T 24	T 35
T 19	/system/1/assets/files/000/000/390/390/10abe0caa/original/TF027.WAV	554 Continuous	Any	T 24	T 35
T 20	/system/1/assets/files/000/000/384/384/5c30f9f4d/original/TF020.WAV	660 Continuous	Any	T 24	T 35
T 21	/system/1/assets/files/000/000/380/380/06feaa7b3/original/TF015.WAV	800 Continuous – IMO code 2 (High)	Any	T 24	T 35
T 22	/system/1/assets/files/000/000/406/406/49b88184e/original/TF043.WAV	1200 Continuous	Any	T 24	T 35
T 23	/system/1/assets/files/000/000/407/407/ecce63f4f/original/TF038.WAV	2000 Continuous	Any	T 3	T 35
T 24	/system/1/assets/files/000/000/421/421/b578af8a9/original/TF005.WAV	2400 Continuous	Any	T 20	T 35
T 25	/system/1/assets/files/000/000/951/951/d9ce2b2c6/original/TF062.wav	440 @ 0.83Hz (0.60s on, 0.60s off) Intermittent	Any	T 44	T 8
T 26	/system/1/assets/files/000/000/954/954/b703d99f1/original/TF063.wav	470 @ 0.9Hz (0.55s on, 0.55s off) Intermittent	Any	T 44	T 8
T 27	/system/1/assets/files/000/000/955/955/0f602886a/original/TF064.wav	470 @ 5Hz (0.10s on, 0.10s off) Intermittent	Any	T 44	T 8
T 28	/system/1/assets/files/000/000/956/956/dbb5f64db/original/TF065.wav	544 @ 1.14Hz (0.43s on, 0.44s off) Intermittent	Any	T 24	T 8
T 29	/system/1/assets/files/000/000/957/957/7bd3d8c1c/original/TF066.wav	655 @ 0.875Hz (0.57s on, 0.57s off) Intermittent	Any	T 44	T 8
T 30	/system/1/assets/files/000/000/397/397/d6d84d0c3/original/TF018.WAV	660 @ 0.28Hz (1.80s on, 1.80s off) Intermittent	Any	T 24	T 8
T 31	/system/1/assets/files/000/000/381/381/93f51c79a/original/TF016.WAV	660 @ 3.3Hz (0.15s on, 0.15s off) Intermittent	Any	T 24	T 8
T 32	/system/1/assets/files/000/000/410/410/a0f0ba2a6/original/TF033.WAV	745 @ 1Hz (0.50s on, 0.50s off) Intermittent	Any	T 24	T 8
T 33	/system/1/assets/files/000/000/379/379/51c1bb5a9/original/TF014.WAV	800 (0.25s on, 1.00s off) Intermittent	Any	T 24	T 8
T 34	/system/1/assets/files/000/000/388/388/b4cf9203e/original/TF023.WAV	800 @ 2Hz (0.25s on, 0.25s off) – IMO code 3.a (High)	Any	T 24	T 8
T 35	/system/1/assets/files/000/000/377/377/ac5498db0/original/TF011.WAV	1000 @ 1Hz (0.50s on, 0.50s off) Intermittent	Any	T 24	T 8
T 36	/system/1/assets/files/000/000/378/378/6380218ec/original/TF013.WAV	2400 @ 1Hz (0.50s on, 0.50s off) Intermittent	Any	T 24	T 8
T 37	/system/1/assets/files/000/000/958/958/a90e62da4/original/TF067.wav	2900 @ 5Hz (0.10s on, 0.10s off) Intermittent	Any	T 24	T 8
T 38	/system/1/assets/files/000/000/959/959/f34b52faa/original/TF068.wav	363/518 @ 1Hz (0.50s / 0.50s) Alternating	Any	T 8	T 19
T 39	/system/1/assets/files/000/000/960/960/368703340/original/TF069.wav	450/500 @ 2Hz (0.25s / 0.25s) Alternating	Any	T 8	T 19
T 40	/system/1/assets/files/000/000/385/385/a85a0a356/original/TF021.WAV	554/440 @ 1Hz (0.50s / 0.50s) Alternating	Any	T 24	T 19
T 41	/system/1/assets/files/000/000/961/961/be2680966/original/TF070.wav	554/440 @ 0.65Hz (0.76s / 0.76s) Alternating	Any	T 8	T 19
T 42	/system/1/assets/files/000/000/962/962/314fe8a1b/original/TF071.wav	561/760 @ 0.83Hz (0.60s / 0.60s) Alternating	Any	T 8	T 19
T 43	/system/1/assets/files/000/000/963/963/5f6deb8a1/original/TF072.wav	780/600 @ 0.96Hz (0.52s / 0.52s) Alternating	Any	T 8	T 19
T 44	/system/1/assets/files/000/000/419/419/e353c86c4/original/TF002.WAV	800/1000 @ 2Hz (0.25s / 0.25s) Alternating	Any	T 24	T 19
T 45	/system/1/assets/files/000/000/419/419/e353c86c4/original/TF002.WAV	970/800 @ 2Hz (0.25s / 0.25s) Alternating	Any	T 8	T 19
T 46	/system/1/assets/files/000/000/375/375/771bd7a3e/original/TF012.WAV	800/1000 @ 0.875Hz (0.57s / 0.57s) Alternating	Any	T 24	T 19
T 47	/system/1/assets/files/000/000/374/374/021ee6540/original/TF010.WAV	2400/2900 @ 2Hz (0.25s / 0.25s) Alternating	Any	T 24	T 19
T 48	/system/1/assets/files/000/000/965/965/e3d76c24c/original/TF073.wav	500/1200 @ 0.3Hz (1.67s / 1.67s) Sweeping	Any	T 24	T 12
T 49	/system/1/assets/files/000/000/964/964/4e1cd3f7f/original/TF074.wav	560/1055 @ 0.18Hz (2.73s / 2.73s) Sweeping	Any	T 24	T 12
T 50	/system/1/assets/files/000/000/966/966/a8e5f4440/original/TF075.wav	560/1055 @ 3.3Hz (0.15s / 0.15s) Sweeping	Any	T 24	T 12
T 51	/system/1/assets/files/000/000/969/969/5734194b1/original/TF076.wav	600/1250 @ 0.125Hz (4s / 4s) Sweeping	Any	T 24	T 12
T 52	/system/1/assets/files/000/000/394/394/1bfee2f1b/original/TF031.WAV	660/1200 @ 1Hz (0.50s / 0.50s) Sweeping	Any	T 24	T 12
T 53	/system/1/assets/files/000/000/420/420/50f9ee7a7/original/TF004.WAV	800/1000 @ 1Hz (0.50s / 0.50s) Sweeping	Any	T 24	T 12
T 54	/system/1/assets/files/000/000/392/392/68d5d1294/original/TF029.WAV	800/1000 @ 7Hz (0.07s / 0.07s) Sweeping	Any	T 24	T 12
T 55	/system/1/assets/files/000/000/389/389/68683d240/original/TF024.WAV	800/1000 @ 50Hz (0.01s / 0.01s) Sweeping	Any	T 24	T 12
T 56	/system/1/assets/files/000/000/422/422/42b72dd93/original/TF006.WAV	2400/2900 @ 7Hz (0.07s / 0.07s) Sweeping	Any	T 24	T 12
T 57	/system/1/assets/files/000/000/373/373/a686b0abe/original/TF007.WAV	2400/2900 @ 1Hz (0.50s / 0.50s) Sweeping	Any	T 24	T 12
T 58	/system/1/assets/files/000/000/398/398/7c1bf5e00/original/TF025.WAV	2400/2900 @ 50Hz (0.01s / 0.01s) Sweeping	Any	T 24	T 12
T 59	/system/1/assets/files/000/000/967/967/2e92dbc46/original/TF077.wav	2500/3000 @ 2Hz (0.25s / 0.25s) Sweeping	Any	T 24	T 12
T 60	/system/1/assets/files/000/000/968/968/5dfcb9aea/original/TF078.wav	2500/3000 @ 7.7Hz (0.65s / 0.65s) Sweeping	Any	T 24	T 12
T 61	/system/1/assets/files/000/000/408/408/e0fadcdd2/original/TF042.WAV	800Hz Motor Siren	Any	T 24	T 12
T 62	/system/1/assets/files/000/000/404/404/1c1741943/original/TF041.WAV	1200Hz Motor Siren	Any	T 24	T 12
T 63	/system/1/assets/files/000/000/409/409/590aa5e82/original/TF044.WAV	2400Hz Motor Siren	Any	T 24	T 12
T 64	/system/1/assets/files/000/000/395/395/631e82dc8/original/TF026.WAV	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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