Aiphone LAW-1 User Manual

AlPHONE

CENTRAL AMPLIFIER SYSTEM

MODELS LAH-20 (twenty-way master station)

LAW”1 (central amplifier)

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LAH-20

(D ©

INSTRUCTIONS -

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(T) Selector buttons

Speaker/Microphonc

(D Expander button (A)
© Communication lamp
® Talk button
® Privacy button
@ Directory card
® Occupied lamp
® Off button
@ Call button

Terminal cord
Terminal box

LAW-1

© ® ® ®

© Volume control for

voice communication

% Volume control for

call tone

@ Timer control for

automatic reset

(adjustable fromapp.

30 to 120 seconds).
DC fuse (lA)
Terminal box

; Terminal cord

SPECIFICATIONS

* Power source:
* Current consumption:

Amplifier output:

* Calling:

Wiring:

DC 12 volt. Use PS-12A (or PS-12C in North America) power supply.

lA maximum during talking per system.
800 mW maximum.
Push button station selection. Occupied lamp illuminates if the system is in use.
7 twisted pairs are required regardless of the number of installed stations. Each pair must

be twisted.

FEATURES

The central amplifier uses advanced integrated circuits providing excellent fidelity and trouble-free operation.

^ Automatic reset ensures that a station left on will not occupy the system (a warning tone sounds before the system

automatically resets).
' A local privacy button and incoming call tone prevent monitoring.
' Warning tone to both parties when called station is in privacy.
‘ Single channel amplifier positively jocks out a third party.
' Hands-free reply at called station.

' Binary computor circuit permits 20 stations to be connected using only 7-pair cable.
'■ Tone and communication volume controls are located on the central amplifier.
' Designed for desk or wall mounting (desk only with handset).

■ Field installed handset provides privacy at calling or receiving stations.

■ An extention talkback speaker may be connected to a LAH-20 station with LAN-1 adaptor.

ÌQUIPMENT AVAILABLE FOR USE WITH YOUR LAH CENTRAL AMPLIFIER SYSTEM

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LAH-20: 20 call master station.

LAN-1: Extention talkback speaker adap
tor. Connects LAH-20 master station to
a paging horn or speaker.

LAW-1 : Central amplifier.

PS-12C: CSA & UNDERWRITERS’ LABO
RATORIES, INC.® Listed power supply
(available only in N. America).

LAR-1: Optional handset. Includes press-

to-taik switch.

PS-12A: Power supply (not available in
North America).

MSTALLATION

Do not attempt to install your intercom system until you have read and thoroughly understood the installation

occdure. Aiphone's warranty is void if system is installed in a manner other than described in this manual.

IRING

Lay out your system in advance and determine a location of each station. Please refer to the chart below to select

oper size wire for your installation. 7 twisted pairs of wire are required regardless of the number of installed stations.

AWG WIRE SIZE
COMMUNICATION DISTANCE FROM

EACH STATION TO AMPLIFIER
DIAMETER OF WIRE

COMMUNICATION DISTANCE FROM

each station to AMPLIFIER

24 AWG

300'

0.5 mm

90 m 150 m

22 AWG

500'

0.65 mm 0.8 mm 1.0 mm

20 AWG

760'

230 m 360 m

18 AWG

1200'

Total iengtii of all communication wire installed per system should not exceed 2km or 1.25 mile.

Refer to the wiring diagram and write your color code in a space provided. Begin with the central amplifier and wire
first two stations, testing ¡item after installation. Unplug power supply while making connections. Refer to the table on
bottom of each station to assign that station’s number.

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