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1                                                                               I56-5925-000 

INSTALLATION AND MAINTENANCE INSTRUCTIONS  

 

 

 

 

 

 

Model LASS-WSS-NC   

Addressable Wall Mount Sounder&Strobe

  

 

Xi'an System Sensor Electronics Ltd.   

28 Tuanjie South Road 

Xi'an Hi-tech Development Zone 

710075, China 

Tel: (+86) 029 85387800  Fax: (+86) 029 88332959

SPECIFICATION 

 

 

Item 

Parameter Description 

Note 

Operating Voltage 

DC24V( DC15V~ DC32V) 

 

Avg. Standby Current 

<400µA 

24VDC, No Communication, No sounding/flashing 

Alarm  Current 

<11mA 

High Volume, 24VDC 

<8.5mA 

Low Volume, 24VDC 

Operating Temp 

-25

~+70

 

 

Humidity 10~95% 

R.H. 

Non-condensing 

Ingress Protection 

IP33  
IP35(With Water-proof box  ) 

 

High Volume 

90

±

4dB(A)    

1m , High Volume, Tone 21 @24V 

92

±

3dB(A)    

1m , High Volume, Tone 13 @24V 

91

±

5dB(A)    

1m , High Volume, Tone 12 @24V 

95

±

5dB(A)    

1m , High Volume, Tone 19 @24V 

Low Volume 

86

±

3dB(A)    

1m , Low  Volume, Tone 21 @24V 

86

±

4dB(A)    

1m , Low  Volume, Tone 13 @24V 

81

±

3dB(A)    

1m , Low  Volume, Tone 12 @24V 

84

±

6dB(A)    

1m , Low  Volume, Tone 19 @24V 

Tone Type 

See table 1:  ‘Sound setting  ’ for detailed tones 

Flash Pattern 

See table 2:  ‘Flash Pattern’  

Flash Intensity 

>1cd 

 

Coverage Volume 

W-3-6/O-3-6 

 

Height 47mm 

 

Diameter 122mm 

 

Weight 

176

±

6g 

 

Meet the following Standards requirements

 

EN54-3 & EN54-23  
AS ISO 7240.3:2014 & AS ISO 7240.23:2014 

 

 
Before installing and using the product, please read the system 
wiring and installation manual thoroughly. If the products will 
be installed in an existing operational system, inform

 

the operator 

and local authority that the system will be temporarily out of 
service, disconnect

 

power to the control panel before installing the 

products. 
NOTICE: This manual should be left with the owner/user of this 
equipment. 

GENERAL 

LASS-WSS-NC is an intelligent addressable AV products 
designed to alarm light/sound for emergency events, and be 
able to communicate with control panel by intelligent protocol. 
It is designed specifically for analogue addressable fire alarm 
system and only can be connected to control panels with a 
compatible proprietary analogue addressable communication 
protocol. It is powered from the loop and can be controlled via 
the communication protocol(s). The Wall Mount Version is 
compatible with B501 mounting base. Up to 99 addresses are 
available via two rotary selector switches.  The sounders have 
2 volume levels (high/low) and 4 tone sets. The alarm 
light/sound can be tested on field.  

INSTALLATION 

It must be installed and wired with B501 mounting base. 
1.

 

Verify the product type matches with product drawing. 

2.

 

Set the address via two rotary selector switches. Please 
refer to “Address setting”. 

3.

 

Volume and tone setting are realized by 4 digit DIP witch. 
On field testing can be tested via DIP switch. 

4.

 

Plug the 

Wall Mount Sounder& Strobe

 into B501 mounting 

base. 

5.

 

Turn the 

Wall Mount Sounder& Strobe

 clockwise until it 

drops into place. 

6.

 

Continue turning the 

Wall Mount Sounder& Strobe

 clockwise 

to lock it in place. 

 

Figure 1 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

SETTING 

Address setting 
Rotary-decade switches are provided for setting the address 
whose range is from 1 to 99. (Default address is 01). 
Address is set by turning the switches. 
Address is calculated as below formula: Address = TENS *10 
+ ONES*1. For instance: Address 05 = 0*10 + 5*1.

 

I5

6

-59
25-
000

 

A5665

006

B501 
Mounting 
Base 

Wall Mount 
Sounder& 
Strobe 

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