KYLAND KGW3204, User Manual, Page: 11 / 44

7
2.4 Dimension Figures
KGW3204 (unit: mm)
2.5 Pin Assignments
2.5.1 Ethernet Ports (RJ45)
2.5.2 Serial Ports (DB9 Male)
The KGW3204 Modbus gateway uses DB9 (male) serial ports to connect Modbus RTU or ASCII devices.
Each port supports three serial interfaces: RS-232, RS-422, and RS-485, and all interface types can be
configured by the software.
Pin MDI-X Signal MDI Signal
1 Rx+ Tx+
2 Rx- Tx-
3 Tx+ Rx+
6 Tx- Rx-
4
，
5
，
7
，
8 Unused
Unused
Pin RS-232 RS-422 RS-485
1 CTS RxD-(B) -
2 RxD RxD+(A) -
3 TxD TxD-(Z) Data-(B)
4 RTS TxD+(Y) Data+(A)
5 GND GND GND
6
– –
7
– –
8
– –
9
– – –