Connecting MODBUS RTU1707/09 MN03407002Z-ENThe following table lists the signals of SWIRE-GW-MB.Table 3: Signals SWIRE GW-MBData transfer with RS485If you are using the RS485 communication standard, pins5,6, 8 and 9 of the gateway’s D-sub socket are used for datatransfer. The Table 4 below lists the pin functions andassignments of the 9.pin D-sub connector.Pin Signal name Designation1 Not used –2 RxD out RS232 transmit3 TxD in RS232 receive4 Not used –5 GND Reference potential6 + 5V + 5V, electrically isolated7 Not used –8 Rx/Tx – (A-Line) RS485 receive/Send data N9 Rx/Tx + (B-Line) RS485 receive/Send data Ph Caution!For communication through RS485 use only pins 5,6,8 and9! Using preassembled data cables that use pins 2 and 3can damage the SWIRE-GW-MB or the other connecteddevice.
