A121 Alarm Horn Sounder 2-21-090

Description

Low current consumption and high SPL in a outdoor rated enclosure ensure the A121 is suitable for all applications including fire, security and process control. Designed to withstand the harshest of environments. Constructed from lightweight, impact and fire-resistant ABS, the A121 employs the latest in reliable D Class amplifier technology for superior sound output with low current consumption. The A121 is a member of the versatile AlertAlarm family of industrial alarm horn sounders – also available with Xenon, AL121X or LED beacons, AL121H. SIL1 & SIL2 Route 2H compliant to IEC61508 (2010) as standard.

Downloads

Datasheet	Datasheet.pdf
Installation Manual	D221-01-051-IS_Issue_8__A121_.pdf
UL certificate of compliance	UL_CoC_-_20210430-S7995_ALERTALARM.pdf
EC CPR Certificate	2821-CPR-0108_-_A112N_A121.pdf
UK CPR Certificate	0843-CPR-1006_-_A112N_A121.pdf
CSFM Listing	CSFM_Listing_2279-0513_A-Series_2025.pdf
UL EU Certificate EN54-3	UL-EU-01153-CPR__A112N_A121_.pdf
Russian EAC Declaration of Conformity	D-GB.G05..12595-20-24.03.2025.pdf
Russian Fire certificate	EAC_Certificate_043_TR_CU-.00291.pdf
Russian Maritime register	19.00193.278.pdf
MED certificate	MEDB000074G-R3.pdf
DNV MED Module D cert	MEDD00000GV-R5.pdf
DNV Type Approval	TAA00002ZU.pdf
USCG Approval	USCG_-_COA_161-002-68-0_A105N__A112N__A121_15-06-2027.pdf
MER certificate	MERB000074G.pdf
UAE Civil Defence	UAE_Civil_Defence_CoC_ULSZ_UVAV.S7995.pdf
Ingress Protection certificate	58D22760E_IP66_certificate_-_A121.pdf
Declaration of Conformity	DC-083_Issue_A_AlertAlarm.pdf
Declaration of Conformity UKCA	DC-085_Issue_A_UKCA_AlertAlarm.pdf
SIL Certificate: Product version [A]	T1072-215-2_SIL2_SIL1_2H__D1xS_D1xC_STExS_STExC_GNExS_A112N_AL112N_A121_AL121_MA_.pdf
Declaration of Performance	DP_-_2821-CPR-0108-Issue_C_A112N_A121.pdf
2D drawing (PDF)	D221-05-051_Issue_A.pdf
2D drawing (DWG)	D221-05-051_Issue_A.DWG
3D drawing (STEP)	D221-05-051-3D_Issue_A.STEP
Wiring Schematic DC voltage	D221-06-001_Issue_C.pdf
Wiring Schematic AC voltage	D221-06-005_Issue_B.pdf

Features

Automatic synchronisation
Continuously rated
Dual M20 or 1/2"NPT clearance cable entries
Duplicate pluggable cable terminations – Class A
Ingress protection IP66 Type 4/4X/13/3R
Conformal coated (tropicalised) electronics
64 alarm tone frequencies and 4 remotely activated alarm stages
Available with custom tone configurations and frequencies
Diode polarized for use in supervised circuits

Specification


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
Voltages DC:	11.5-54V dc
Voltages AC:	100-240V ac 50/60Hz
In rush:	815mA within 4.0ms @ 24Vdc
Stage switching:	Negative, positive, voltage free
Safety Integrity Level:	SIL1 and SIL2 Route 2H IEC61508 (2010)
Ingress protection:	IP66 Type 4/4X/13/3R
Enclosure:	High impact UL94 V0 & 5VA FR ABS
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:	99%
Vibration test:	35Hz for a duration 4Hr (UL464)
Jarring test:	3ft/lb Energy (UL464)
Impact test:	3x 5lb (UL464)
MTBF DC:	93.92 years / 822,706 hours – MIL 217
MTBF AC:	46.66 years / 408,508 hours – MIL 217
Weight DC:	2.10kg / 4.62lbs
Weight AC:	2.70kg / 5.94lbs

Current Consumption

Product Version:	Nominal Voltage:	Voltage Range:	Default Power Level Current:	High Power Level Current:

DC024	12dc 24Vdc 48Vdc	11.5-54Vdc	376mA 430mA 223mA	440mA 930mA 453mA
AC230	115Vac 50/60Hz 230Vac 50/60Hz	100-240Vac	173mA 105mA	340mA 212mA

Part Codes

Variable:	Identifier:	Description:

Product type:	A121	Alarm horn sounder
Voltage:	DC024 AC230	11.5-54Vdc 100-240Vac 50/60Hz
Back box/cable entries: [e]	A	Back box with mounting lugs – 2 x M20, 1/2"NPT clearance entries
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	UL/cUL, ULC, CPR, MED, DNV, USCG, RMRS, EAC, CE, UKCA – SIL1 & SIL2
Product option: [o]	1 Z X Y K	Standard product Custom alarm tone software – contact E2S Custom configuration – contact E2S Stage control Config. 4 Stage control Config. 5 (DC) and Config. 2 (AC)
Enclosure colour: [x]	G R S	Grey Red Special colour – contact E2S
Alarm stage control:
Please review the installation manual and wiring schematics for remote stage control and EOL resistor monitoring configuration options:
Config. 1 [DC]:	Factory default. Common negative, positive switching. Up to 4 Alarm Stages. EOL monitoring Alarm Stage 1 only
Config. 2 [DC]:	User setting. Common positive, negative switching. Up to 4 Alarm Stages. EOL monitoring Alarm Stage 1 only
Config. 3 [DC]:	User setting. Common negative, positive switching activation of Alarm Stages 1 & 2 with EOL on both stages. Reverse polarity monitoring
Config. 4 [DC]:	Product option ‘Y’. Independent activation of Alarm Stages 1 & 2 with EOL on both stages. Forward polarity monitoring
Config. 5 [DC]:	Product option ‘K’. Horn continuously powered. Voltage free activation of up to 3 alarm stages
Config. 1 [AC]:	Factory default. Up to 4 Alarm Stages. Stage 1 activated at power on. Stages 2, 3 and 4 via volt free contacts
Config. 2 [AC]:	Product option ‘K’. Horn continuously powered. Voltage free activation of up to 3 alarm stages

Approvals

UL: UL464
cUL: CSA C22.2 No 205-17
ULC: CAN/ULC-S525
UL EU: (EN54-3) UL-EU-01153-CPR
CPR 305/2011: 2821-CPR-0108
MED 2023/1667: MEDB000074G
MER MSN 1874: MERB000074G
DNV GL-CG-0339: TAA00002ZU
USCG COA 161-002-68-0
EAC CU TR 043/2017: B.00291/21
EAC: RU D-GB.GA05.B.12595-20
RMRS Marine: No. 19.00193.278
SIL1 & SIL2 compliant to IEC61508 (2010)
CE, UKCA

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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