CEL-MAR ADA-DIOC40, User Manual

Page: 6 / 20

Fig 4b. 2-Wires connection of ADA-DIOC40 to PC with the use of ADA-I9140 USB to RS485/RS422
3.3. CONNECTION TO RS485/RS422 BUS
RS485/RS422 interface in ADA-DIOC40 module is described as: Tx+/A, Tx-/B, Rx+, Rx-.
Connections of ADA-DIOC40 to RS485(4W) and RS485(2W) bus are shown bellow.
3.3.1. CONNECTION TO RS485(4W) BUS
Fig 5. Example connection of ADA-DIOC40 to RS485(4W) 4-wire bus
3.3.2. CONNECTION TO RS485(2W) BUS
Fig 6. Example connection of ADA-DIOC40 to RS485(2W) 2-wire bus
6
ADA-DIOC40
GND
USB
USB
connector
Screw
connector
RS485 / RS422
RS485(2W)
9600Bd/8/N/1
USB
connector
PC ADA-I9140
USB
Rx+
Rx-
Tx+/ A
Tx-/ B
Tx+ / A
Tx- / B
Rx+
Rx-
Screw
connector
IN / OUT
DI+
DI-
DO-
NC
DO+
Screw
connector
RS485 / RS422
ADA-DIOC40
(5) GND
GND
(2) Rx
(3) Tx
RS232
connector DB-
9F/DCE
RS485 / RS422
screw
connector
RS485(4W) bus
9600Bd/8/O/1
RS232
connector
DB-9M/DTE
PC or
MASTER device ADA-I1040
GND (5)
Tx (2)
Rx (3)
Rt
Rt
Rx+
Rx-
Tx+/ A
Tx-/ B
T
x+
/
A
T
x-
/
B
R
x+
R
x-
A
D
A
-D
IO
C
4
0
T
x+
/ A
T
x-
/ B
R
x+
R
x-
R
t
R
t
T
x+
/
A
T
x-
/
B
R
x+
R
x-
C
o
n
n
e
ct
o
r
R
S
48
5
/
R
S
4
22
C
o
n
n
e
ct
o
r
R
S
48
5
/
R
S
4
22
C
o
n
n
e
ct
o
r
R
S
48
5
/
R
S
4
22
C
o
n
n
e
ct
o
r
IN
/
O
U
T
C
o
n
n
e
ct
o
r
IN
/
O
U
T
N
C
D
O
+
D
O
-
D
I+
D
I-
C
o
n
n
e
ct
o
r
IN
/
O
U
T
A
D
A
-D
IO
C
40
A
D
A
-D
IO
C
4
0
N
C
D
O
+
D
O
-
D
I+
D
I-
N
C
D
O
+
D
O
-
D
I+
D
I-
(5) GND
GND
(2) Rx
(3) Tx
RS232
connector DB-
9F/DCE
RS485 / RS422
screw
connector
RS232
connector
DB-9M/DTE
ADA-I1040
GND (5)
Tx (2)
Rx (3)
Rt
Rx+
Rx-
Tx+/ A
Tx-/ B
RS485(2W) bus
9600Bd/8/O/1
PC or
MASTER device
T
x+
/
A
T
x-
/
B
R
x+
R
x-
A
D
A
-D
IO
C
4
0
T
x+
/ A
T
x-
/ B
R
x+
R
x-
R
t
R
t
T
x+
/
A
T
x-
/
B
R
x+
R
x-
C
o
n
n
e
ct
o
r
R
S
48
5
/
R
S
4
22
C
o
n
n
e
ct
o
r
R
S
48
5
/
R
S
4
22
C
o
n
n
e
ct
o
r
R
S
48
5
/
R
S
4
22
C
o
n
n
e
ct
o
r
IN
/
O
U
T
C
o
n
n
e
ct
o
r
IN
/
O
U
T
N
C
D
O
+
D
O
-
D
I+
D
I-
C
o
n
n
e
ct
o
r
IN
/
O
U
T
A
D
A
-D
IO
C
40
A
D
A
-D
IO
C
4
0
N
C
D
O
+
D
O
-
D
I+
D
I-
N
C
D
O
+
D
O
-
D
I+
D
I-