CEL-MAR ADA-401WA, Руководство пользователя

Страница: 6 / 16

Fig. 4. 4-wire connection of ADA-401WA to PC by the use of USB to RS485/RS422 converter ADA-I9140
Fig. 5. 2-wire connection of ADA-401WA to PC by the use of USB to RS485/RS422 converter ADA-I9140
3.3. CONNECTION TO RS485/422 BUS
EIA-485 Standard allows to connect up to 32 devices to RS485 bus on the length of 1200m. In the purpose of connection more
devices or extend the length of the bus should be used additional devices like separator / repeater eg. ADA-4040, ADA-4044H.
Connection of RS485 bus to ADA-401WA converter is shown on figure below.
Fig. 6. Example connection of ADA-401WA to 4-wire RS485 Bus
Fig. 7. Example connection of ADA-401WA to 2-wire RS485 Bus
6
ADA-401WA
VDD
1-W
GND
GND
USB
USB
connector
Screw
connector
RS485 / RS422
RS485(4W)
9600Bd/8/N/1
USB
connector
ADA-I9140
USB
Rx+
Rx-
Tx+/ A
Tx-/ B
Tx+ / A
Tx- / B
Rx+
Rx-
Screw
connector
1-WIRE Screw
connector
RS485 / RS422
ADA-401WA PC
VDD
1-W
GND
GND
USB
USB
connector
RS485 / RS422
connector
RS485(4W)
9600Bd/8/N/1
USB
connector
ADA-I9140
USB
Rx+
Rx-
Tx+/ A
Tx-/ B
Tx+ / A
Tx- / B
Rx+
Rx-
1-WIRE
connector
RS485 / RS422
connector
ADA-401WA PC
(5) GND
GND
(2) Rx
(3) Tx
ADA-401WA
RS485(4W) Bus
T
x+
/
A
T
x-
/
B
G
N
D
R
x+
R
x-
RS232
connector
PC
ADA-I1040
ADA-401WA
T
x+
/ A
T
x-
/ B
G
N
D
R
x+
R
x-
ADA-401WA
T
x+
/
A
T
x-
/
B
G
N
D
R
x+
R
x-
GND (5)
Tx (2)
Rx (3)
Rt
Rt
Rx+
Rx-
Tx+/ A
Tx-/ B
R
t
R
t
RS232
connector
RS485/422
connector
R
S
4
85
/4
22
c
o
n
n
e
ct
o
r
R
S
4
85
/4
22
c
o
n
n
e
ct
o
r
R
S
4
85
/4
22
c
o
n
n
e
ct
o
r
(5) GND
GND
(2) Rx
(3) Tx
ADA-I1040
GND (5)
Tx (2)
Rx (3)
Rt
Rx+
Rx-
Tx+/ A
Tx-/ B
ADA-401WA
RS485(2W) Bus
ADA-401WA ADA-401WA
RS232
connector
RS232
connector
RS485/422
connector
PC