3.3. CONNECTION TO RS485/RS422 NETWORK
RS485/RS422 interface in ADA-1040 converter is available on screw terminal block described as:
Tx+, Tx-, Rx+, Rx-, GND.
The way of connection the converter to RS485(4W) / RS422 bus, is shown below.
3.3.1. POINT-TO-POINT CONNECTION DEVICE WITH RS422 OR RS485(4W) INTERFACE
Example connection is shown below.
Fig 7. Example point-to-point connection to RS422 device
3.3.2. MULTI-POINT CONNECTION RS485(4-WIRE) DEVICES
Example connection is shown below
Fig 8. Example multi-point connection to RS485(4W) devices
7
ADA-1040
RS485(4W)/RS422
Network (up to 1200m)
ADA-1040
RS485/422
terminal
Vss+
Vss-
Power
Supply
RS232
DCE/DB-9F
CTS -7
RTS -8
GND -5
Vss-
Vss+
Tx -2
Rx -3
DSR -4
DTR -6
Tx +
Tx -
Rx +
Rx -
Device with RS422
RS422
Terminal
Vss+
Vss-
RS232
DCE/DB-9F
CTS -7
RTS -8
GND -5
Vss-
Vss+
Tx -2
Rx -3
DSR -4
DTR -6
Tx +
Tx -
Rx +
Rx -
Rt
Rt
Power
Supply
ADA-1040
RS485/422
terminal
Vss+
Vss-
Power
Supply
RS232
connector
Vss-
Vss+
Tx +
Tx -
Rx +
Rx -
Rt
Rt
CTS -7
RTS -8
GND -5
Tx -2
Rx -3
DSR -4
DTR -6
RS485(4W) / RS422 Network
1200m
