66550033-EN - V4.0 - 15/02/19
- 39 -
BUS
OUT
BUS
IN
BUS OUT 1
C
lo
se
O
pen
Close
Open
Close
Open
Close
Open
Close
Open
BUS OUT 2
BUS OUT 3
BUS OUT 4
BUS LINE
TERMINATION
AMPLIFICATION
S1
S2
S3
S4
H
L
M
ON
OFF
AMP
Art.317N
4/4
Local Bell
Local Bell
Local Bell
5
4
38
7
6
ON
2
1
4
3
ON
2
1
Videophone:
Extension N.
BUS
1
BUS
2
G
ND
+12V
M
G
ND
+DO
L
AL
-L
B G
N
D
LB
AL
-DO
L
+V
A
U
X
C
N
O
S3
Term. ON
Term. OFF
11
1
ART.6388
5
4
38
7
6
ON
2
1
4
3
ON
2
1
Videophone:
Extension N.
BUS
1
BUS
2
G
ND
+12V
M
G
ND
+DO
L
AL
-L
B G
N
D
LB
AL
-DO
L
+V
A
U
X
C
N
O
S3
Term. ON
Term. OFF
12
1
ART.6388
Local Bell
Local Bell
Local Bell
5
4
38
7
6
ON
2
1
4
3
ON
2
1
Videophone:
Extension N.
BUS
1
BUS
2
G
ND
+12V
M
G
ND
+DO
L
AL
-L
B G
N
D
LB
AL
-DO
L
+V
A
U
X
C
N
O
S3
Term. ON
Term. OFF
9
1
ART.6388
5
4
38
7
6
ON
2
1
4
3
ON
2
1
Videophone:
Extension N.
BUS
1
BUS
2
G
ND
+12V
M
G
ND
+DO
L
AL
-L
B G
N
D
LB
AL
-DO
L
+V
A
U
X
C
N
O
S3
Term. ON
Term. OFF
10
1
ART.6388
3
Termination
closed