Atop Technology MB5416A2 User manual - Manual (Page 61)

Atop Modbus Gateway
MB54XX-X Series
User’s Manual V 1.1
58
RJ45 to Male DB9 Connector
Table 5. 5
RJ45 Male DB9
RTS Pin 1  Pin 7 RTS
DTR Pin 2

Pin 4 DTR
TXD Pin 3  Pin 3 TXD
SG Pin 4 
Pin 5 GND
SG Pin 5

RXD Pin 6  Pin 2 RXD
DSR Pin 7  Pin 6 DSR
CTS Pin 8

Pin 8 CTS
RS-232/RS-422 to RJ-45 Cross over Connection
Table 5. 6
RJ45 A RJ45 B
RS-422 RS-232 RS-232 RS-422
RTS Pin 1  Pin 8 CTS
TX- DTR Pin 2  Pin 7 DSR RX-
TX+ TXD Pin 3  Pin 6 RXD RX+
SG Pin 4  Pin 5 SG
SG Pin 5

Pin 4 SG
RX+ RXD Pin 6  Pin 3 TXD TX+
RX- DSR Pin 7  Pin 2 DTR TX-
CTS Pin 8

Pin 1 RTS