CEL-MAR ADA-4010A Manual do utilizador - Página 6
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ADA-4010A
PC
USB
connector
USB
Fig 4b. ADA-4010A 2-wires connection to PC by the use of USB to RS485/RS422 converter ADA-I9140
3.3. RS485 BUS CONNECTION
The RS485/RS422 interface at ADA-4010A converter is available on terminal block described as: Tx+/A, Tx-/B, Rx+, Rx-, GND.
Below are shown connections of ADA-4010A converter to RS485(4W) and RS485(2W) buses.
3.3.1. RS485(4W) BUS CONNECTION
PC or
MASTER device
RS232
RS232
connector
connector DB-
DB-9M/DTE
9F/DCE
(2) Rx
Tx (2)
(3) Tx
Rx (3)
(5) GND
GND (5)
Fig 5. Example connection of ADA-4010A to RS485(4W) 4-wire bus and galvanic separation SLAVE device
ADA-I9140
Screw
USB
connector
connector
RS485 / RS422
USB
ADA-I1040
Screw
connector
RS485 / RS422
Tx+/ A
Rt
Tx-/ B
Rx+
Rt
Rx-
GND
RS232
RS485(2W)
Tx+/ A
Tx-/ B
Rx+
Rx-
GND
RS485(4W) bus
9600Bd/8/O/1
RS232
SLAVE
9600Bd/8/E/1
6
ADA-4010A
Screw
Screw
connector
connector
RS485 / RS422
RS232
Tx+ / A
Tx
Tx- / B
Rx
Rx+
RTS
Rx-
CTS
GND
RS232
SLAVE
2400Bd/8/N/2
SLAVE
19200/Bd/7/N/2