Aiphone LAF-20 User Manual
Page 4
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The following diagram illustrates an intermixed LAP system. All stations connected to the
BG-IAC/PG-KC will receive all-call announcements and BGM. Substations must be connected to the
BG-IAC/PG-KC thru a 15 mfd bipolar capacitor as shown (if BGM/all-call is desired), or the system
will not work.
WIRING DIAGRAM #1
NOTE: Remove the shorting link attached to the (E) and ( —)
terminals on all substations
as shown if your system
uses 2 or more masters. In
this case, 2 common and 1
individual wire per sub are
required.
SUB 1
0
.0
0
LA-A
SUB 2
,0
r0
■0
LA-A
SUB 3
,0
0
0
LA-A
MASTER 1
LAF-20S
MASTER 2
LAF-20
NOTE: Separate AC trans
former (PT-1210) is
required to power
door release. Wiring
should be separated
from communication
wiring to avoid noise
from activated door
release.
DOOR
STATION
r0
0
POWER SUPPLY
LA-0
PT-1210
TRANSFORMER
0
,0
PS-12C
EL-9S
.0
0
’ s
0
10
,0
A1
,0
A2
0
A8
0
0
A^
0
AlO
0
0
0
0
>0
MASTER 3
LAF-20S
MTSTER
LAF-20
ci
A
1^
o,
10
p
c*
2^
A
2^
P-
s
10^
10^
o>
c®
p
A1^
A1^
r>
A1^
_O
l
kP
A2^
P
S
kP
S
A3^
S
P
A8
A8^
A9^
A9
kP
P
AlO
Ok
AlO
AlO
P
20
O
l
10^
P
O
l
E0
Ok
_
O
l
_
O
l
_P
P
P-
P1^
_p
P2
Ok
P3^
Ok
P
4