LS Control Alarm WE 981 Bedienungsanleitung
Manual for Alarm WE 981
LS Control A/S Page 1 / 5
Manual: 950-205795_Alarm_WE_981_UK rev.1.2
Alarm WE 981
Universal alarm with audible and visual alarm signals with sound
mute function.
Alarm WE 981 is available in 3 models with different supply power.
•100 –240VAC (Product no. 49128)
•15 - 40VDC or 24VAC (Product no. 49129)
•11 –14VDC or 9VAC (Product no. 49127)
Mounting
Alarm WE 981 is mounted according to the general applicable installation rules. Alarm WE 981 is
to be fixed on a plane and stable surface with screws in the 4 corner holes. Alarm WE 981 is not to
be fixed on moving or vibrating surfaces.
Manual for Alarm WE 981
LS Control A/S Page 2 / 5
Manual: 950-205795_Alarm_WE_981_UK rev.1.2
Electrical connections
All 3 models with different power supply are shown below:
Terminal connections for Alarm WE 981
Terminal no
Description
Comments
1
0V (common zero)
2
Light input (alarm when connected to 0)
active low with internal pull up
3
Sound input (alarm when connected to 0)
active low with internal pull up
4
Voltage free relay switch –normally open.
The relay is activated when the sound mute
button is pressed, i.e. the relay switch will close.
Max 30VDC 6A
Max 50VAC 6A
5
6
9VAC or 9-14VDC
Positive terminal when DC
7
N DC
8
24VAC or 15-40VDC
Positive terminal when DC
9
Negative terminal when DC
10
100 –240 VAC supply
LIVE cable (L)
11
NEUTRAL cable (N)
Manual for Alarm WE 981
LS Control A/S Page 3 / 5
Manual: 950-205795_Alarm_WE_981_UK rev.1.2
Jumper settings
When the jumper is placed in position ON,it is possible to mute the audible alarm by pressing the
sound mute button. It is possible to reactivate the sound by removing and reactivating the sound
input on terminal 3.
When the jumper is placed in position OFF, it is only the sound reset relay which closes, when the
sound mute button is activated.
Functional description
Sound reset relay:
The sound reset relay is activated when the sound mute button is pressed. The sound reset relay will
deactivate 1 second after the sound mute button is released.
When the relay is activated, a connection between terminals 4 and 5 will be established.
Sound signal:
When terminal 3 receives a sound input, the sound signal will be audible. The sound signal consists
of 2 “beeps” per second. The duration of a ”beep” is 0.1 second.
Light signal:
When terminal 2 receives a light input, the light signal will be visible. The sequences of the light
signal are shown below. The duration of a sequence is 1.4 second.
= LIGHT
Internal sound reset
ON
OFF
Manual for Alarm WE 981
LS Control A/S Page 4 / 5
Manual: 950-205795_Alarm_WE_981_UK rev.1.2
Connection examples
Simple alarm lamp
As soon as 24VAC is connected, the visual and audible alarms will be active. It is possible to
deactivate the audible alarm by activating the sound mute button. To reactivate the audible alarm,
disconnect and reconnect 24VAC.
Connection to PLC
In this situation the visual and audible signals are controlled by the PLC. It is not possible to mute
the sound internally, but the PLC will receive a signal when the sound mute button is pressed.
No internal reset of sound.
Jumper in position OFF.
2 short circuits
between terminals
1, 2 and 3
Internal reset of sound.
Jumper in position ON.
Manual for Alarm WE 981
LS Control A/S Page 5 / 5
Manual: 950-205795_Alarm_WE_981_UK rev.1.2
Technical data
Power supply (depending on model): 100 –240VAC, Max 3W (Prod. No. 49128)
15 - 40VDC / 24VAC, Max 3W (Prod. No. 49129)
11-14VDC / 9VAC, Max 2W (Prod. No. 49127)
Enclosure : IP 22
Dimensions (hxwxd) : 123x120x56 mm
Weight : 300g
Operating temperature : -25 to 50 C
Sound level : >85dBA @ 10cm
Applied standards
DS/EN 60730-1:2012
Automatic electrical controls for household and similar use
EN 61000-6-3/A1/AC:2012
EN 61000-6-3/A1:2011
EN 61000-6-3:2007
Electromagnetic compatibility (EMC)
Emission standard for residential, commercial and light-industrial
environments
EN 61000-6-1:2007
Electromagnetic compatibility (EMC)
Immunity for residential, commercial and light-industrial
environments
Date: 8/1-2019
Made by: BSJ/df
Rev. 1.2
Manufactured by: LS Control A/S
Industrivej 12
DK-4160 Herlufmagle
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