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Installation and
Operation:
¢ñ. Hardwares:
£¨1£© Master station speaker
£¨2£© Master station MIC
£¨3£© Power indictor light
£¨4£© Volume button£¨VOL£©
£¨5£© Power switch£¨POWER£©
£¨6£© Master station call key (CALL)
£¨7£© Master station talk key (TALK)
£¨8£© Selected substation indicator light
£¨9£© Selected substation switch
£¨10£© Master station interface
£¨11£© Accessorial station terminal
£¨12£© Selected substation switch of the accessorial station
£¨13£© Selected substation indicator light of the accessorial station
£¨14£© Accessorial station interface
¢ò. Technical Parameters:
Working voltage: DC6V
Max working current: 500mA
Output power of master station: 350mW
Master station dimension: 220x200x55mm(LxWxH)
Accessorial station dimension:100x200x55mm(LxWxH)
Communication distance: 80m(0.2mm2); 200m(0.5mm2); 300m(0.75mm2);
400m(1.0mm2) 
Model:NB-20
Model:NB-20G
¢ó. Installation Operation: The connecting method is as follows:
1. After the connecting installation as the connecting method shown
in the figure successfully, press the power switch of master
station, the power indictor light will be on which means the normal
state of the power.
2. Call from substation to master station and enter the intercom:
If there is an alarm from any substation to the master station
(press Alarm key of substation), the corresponding substation
indictor light in the master station will blink and keep in red, and
there will be music alarm with the master station. The music will
not stop till you press the corresponding switch of the substation
in the master station, and the indicator light will turn to green.
At the time, the intercom between master station and substation is
available (press Intercom key in master station to enter the talk
and release the key to listen to the talk in substation). If there
are other alarms from substations to the master station, the
corresponding indicator light of substation is master station will
blink in red without music alarm, the indicator light of substation
will turn to green when you press the corresponding switch of
substation in master station.
3. Call from the master station to the substation or enter an
intercom and monitor:
Press the desired substation switch in master station, the
corresponding substation indicator light will turn to green, and the
master station can monitor the substation, further press Call key in
master station, there will be music call with the master station and
the substation. Release Call key in master station, the music will
stop, and you can enter the intercom between the master station and
substation. (The intercom method is same as above).
4. Call from the master station to multi substations and intercom
among (i.e.: group-call and all-call functions):
Press all the desired substation switch in master station, the
corresponding substation indicator light will turn to green, further
press Call key in master station, there will be music call with the
master station and all the called substations. Release the call key
in master station, the music will stop, and you can enter the
intercom between the master station and all the called substations.
(The intercom method is same as above).
5. The alarming output port (ALARM) can be connected with alarming
horns and sirens. When the substation switch in master station is
not pressed, it can drive the alarming horns or sirens.
6. Insert the plug of Accessorial station NB-20G to the port of
master station, it will form a 40-call master station NB-40. If you
insert another plug of another Accessorial station to the port of
this Accessorial station, it will form a 60-call master station
NB-60¡¡
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