CEL-MAR ADA-4044H, User Manual

Page: 8 / 16

Fig. 5. Star type connection of devices with 2-wire RS485 interface to main 2-wire RS485 bus. Device separation from main 2-
wire bus, extending the main bus by a further segments of 1200m, signal amplification, possibility of connection additional
128 devices.
8
ADA-4044H
R
S
48
5(
2W
)
co
n
n
ec
to
r
R
x+
R
x-
G
N
D
T
x+
/
A
T
x-
/
B
IN
c
o
n
n
ec
to
r
R
S
48
5(
4W
)
O
U
T
co
n
n
ec
to
r
R
S
48
5
(4
W
)
R
2+
/A
4
R
2-
/B
4
T
2+
/A
3
T
2-
/B
3
R
t
R
t
V
ss
+
V
ss
-
V
ss
-
V
ss
+
P
o
w
er
s
up
p
ly
R
1+
/A
2
R
1-
/B
2
T
1+
/A
1
T
1-
/B
1
R
t
R
t
-
-
A
B
A
B
GND
Rt
A
D
A
-4
04
4H
S
LA
V
E
-6
5
S
LA
V
E
-6
6
S
LA
V
E
-1
28
...
S
L
A
V
E
SLAVE
R
S
48
5(
4W
)
co
n
n
ec
to
r
M
A
S
T
E
R
MASTER
S
e
g
m
en
ts
o
f
4x
R
S
48
5
(2
W
)
b
u
s
-
-
A
B
GN D
A
B
GN D
Rt
S
L
A
V
E
-2
...
S
L
A
V
E
-3
2
-
-
A
B
GN D
S
L
A
V
E
-1
-
-
-
-
A
B
GND
-
-
GND
-
-
A
B
GN D
A
B
GN D
Rt
S
LA
V
E
-2
...
S
LA
V
E
-3
2
-
-
RS 485 (2W)
co nn ect or
A
B
GN D
S
LA
V
E
-1
-
-
-
-
A
B
A
B
GND
Rt
S
LA
V
E
-3
3
S
LA
V
E
-3
4
S
LA
V
E
-6
4
...
-
-
A
B
GND
-
-
GND
Ma in R S4 85 (2W ) b us
- -
G
N
D
A B
R
t
- -
G
N
D
A B
R
t
RS 485 (2W)
co nn ect or
RS 485 (2W)
co nn ect or
RS 485( 2W)
con nec to r
RS 485( 2W)
con nec to r
RS 485( 2W)
con nec to r
RS485(2W)
connector
RS485(2W)
connector
RS485(2W)
connector
RS485(2W)
connector
RS485(2W)
connector
RS485(2W)
connector
R
t
R
t