Cable Requirements; Power Supply; Wiring Diagrams - Aiphone LEF Series Installation & Operation Manual

LEF All-Master configuration
LEF all-master systems are designed to be wired in a looped fashion from the first to last master. The number of conductors for a
system (not including "K" for terminals) are:
• A single-master system can be wired with 2 conductors homerun from each sub. (Wire #822202 or #821802 in USA)

Cable requirements

Use multi-conductor cable with an overall shield, non-twisted, 22AWG to 18AWG (0.65mm to 1.0mm), to accommodate the
maximum number stations in the system, each of which requires one designated wire, plus up to nine common wires per system,
depending on features used. Selective door release adds one additional wire per door being released. Use the gauge specified
for the maximum distance between the two farthest stations.

Power supply

The entire LEF system can be powered by one power supply (PS-1225UL, PS-1225S, 12VDC, 2.5A), located near the center of
the wire run.
For a system including the All Call and Chime with the BG-10C, one PS-1225UL(S) will power the BG-10C and the LEF system.

Wiring Diagrams

• Three LEF-3 and One Door Station
LE-D or LE-DA
• Two LEF-3 and 2 Door Stations
LE-D or LE-DA
Model Cable
LEF-3 9 conductors
LEF-5 12 conductors
LEF-10 17 conductors
LEF-10S 20 conductors
LE Subs 3 conductors
1
E
PS12
+
– –
LE-D or LE-DA
1
1
E E
– –
Wire number
#822210 (22AWG, 10 cond.)
#822212 (22AWG, 12 cond.)
#822220 (22AWG, 20 cond.)
#822220 (22AWG, 20 cond.)
#822203 or #821803 (22AWG, 3 cond.)
LEF-3 #1 LEF-3 #2 LEF-3 #3
C 1
2 C
3 3
1 2
E E
R R
Y Y
+ +
– –
LEF-3
1
C
2
3
E
R
Y
+ +
– –
PS12
– 6 –
Note: This diagram assigns the master
stations as station 1, 2, and 3. The door
station is answered on each station's own
1
2
number terminal (1, 2, or 3 respectively).
C
3
Remove the shorting link between
E
R "E" and "-" terminals at all the LEF
Y
masters and door/sub stations.
+
PS12 : PS-1225UL
–
PS-1225S
PS-1215DIN
LEF-3
Note: This diagram assigns both master
stations to use channel 1 to talk to the
other master. The door stations are on
C
1
channels 2 and 3 respectively.
2
3
Remove the shorting link between
E
"E" and "-" terminals at all the LEF
R
masters and door/sub stations.
Y
+
PS12 : PS-1225UL
–
PS-1225S
PS-1215DIN