Connection To 4-Wire Rs485(4W) Bus; Connection To 2-Wire Rs485(2W) Bus - CEL-MAR ADA-I1040 User Manual

ADA-I1040

3.2.2. CONNECTION TO 4-WIRE RS485(4W) BUS

After connection of devices according to diagram below the converter should set to functioning on RS485 bus.
ADA-I1040
RS232 RS485(4W)
connector Terminal
RS232
Rt
DB-9F
Rt
GND
V-
V+
Power
Vss+
Vss-

3.2.3. CONNECTION TO 2-WIRE RS485(2W) BUS

After connection of devices according to diagram below the converter should set to functioning on RS485 bus.
ADA-I1040
RS232 RS485(2W)
Connector Terminal
RS232
Rt
DB-9F
GND
V-
V+
Power
Vss+
Vss-
Tx+/A
Tx- /B
Rx+
Rx-
Fig. 6. Example connection of RS485(4W) devices
Tx+ /A
Tx- /B
Rx+
Rx-
Fig.7. Example connection of RS485(2W) devices
RS-485 (4W) bus
RS485 (2W) bus
7