CEL-MAR ADA-4044H, User Manual

Page: 6 / 16

Fig. 3. Star type connection of devices with 4-wire RS485 interface to main 2-wire RS485 bus. Conversion of 2-wire bus to 4-
wire bus, device separation from main 2-wire bus, extending the main bus by a further segments of 1200m, signal
amplification, possibility of connection additional 64 devices.
6
ADA-4044H
R
S
48
5(
2W
)
C
o
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
C
o
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
RS485(4W)
Connector
Tx-
GND
Rx+
Rx-
RS485(4W)
Connector
Tx+
Tx-
GND
Rx+
Rx-
RS485(4W)
Connector
Tx+
Tx-
GND
Rx+
Rx-
Tx+
Rt
Rt
A
D
A
-4
04
4H
S
L
A
V
E
-3
3
S
L
A
V
E
-3
4
S
L
A
V
E
-6
4
...
S
L
A
V
E
RS 485 (4W)
Co nn ecto r
Tx-
GN D
Rx+
Rx-
RS 485 (4W)
Co nn ecto r
Tx+
Tx-
GN D
Rx+
Rx-
RS 485 (4W)
Co nn ecto r
Tx+
Tx-
GN D
Rx+
Rx-
Tx+
Rt
Rt
S
L
A
V
E
-2
S
L
A
V
E
-1
...
S
L
A
V
E
-3
2
SLAVE
R
S
48
5(
2W
)
C
o
n
n
ec
to
r
- -
G
N
D
A B
R
t
M
A
S
T
E
R
MASTER
S
e
g
m
en
ts
o
f
2x
R
S
48
5
(4
W
)
b
u
s
ma in R S4 85 (2W ) b us
- -
G
N
D
A B
R
t