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Aiphone LAF-20 User Manual

Page 6

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The diagram below illustrates a typical single master system with an NP-B Call-in button, AH-

108 Horn Speaker, and an LT-1 Matching Transformer installed. In operation, the horn speaker will

function just like a standard substation.

WIRING DIAGRAM #2

LAF-20

NOTE: If your system consists of just I master and several

subs, only 2 wires per sub to the master are required.

Leave the (E) and ( —) terminals on all subs shorted

together. Also, make a jumper and short the (E) and

( —) terminals on the master station terminal box as

shown.

L+’ V + ’<'1

OPERATION

MASTER STATION

★ Illuminated Occupied light indicates another master is using the system. Make your call once the

light has gone out.

★ Placing a call;

1) Depress the selector button for the desired

station.

2) To call by tone, momentarily press both PRI­

VACY and TALK buttons. To call by voice,

depress the TALK button and speak.

3) Depress the TALK button to speak, release

to listen. If using LAR-2 handset, use the

TALK switch in the handset to control

conversation.

4) Upon completing conversation, press the

OFF button and release the depressed selec­

tor button(s) by pressing any other selector

button half way down.

Call by voice

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