Description • 3
Application note
A206000
2 Description
This application describes the operation of the WAGO 750-312 Buscoupler
with the WinTech (TM) Modbus Scanner software. This note also describes a
typical 4 wire connection diagram to a standard RS-232 port utilizing a RS-
232 to RS-485 converter on a DOS based computer running Windows 95 and
NT.
3 Reference Material
WAGO Modbus Manual 750-138
Modbus Protocol (obtained from WAGO application engineers)
Hardware Required
DOS Based Computer with Windows 95 or NT
Modbus Buscoupler 750-312, any I/O and end module 750-600
B&B Electronics RS-232 to RS-485 converter
Misc. cables DB connectors and hoods
4 Solution
4.1 1.
Connect the WAGO 750-650
COMPUTER
B&B
750-312
RS-232 / 485
Pin to Pin of B&B converter
TD(a)------------------------------- 7
TD(b)--------------------------------2
RD(a)--------------------------------8
RD(b)--------------------------------3
SHIELD-----------------------------5
*
Note: Utilize the manual provided by WAGO as a reference for
this procedure.
