Rs232/rs485/rs422 via rj45, Figure 21: rj45 port pin-out, Table 8: rj45 port pin-out – RuggedCom RS416 User Manual
Page 27
Serial Ports
27
RuggedCom
®
RuggedServer™ RS416 Family Installation Guide rev118
3.4 RS232/RS485/RS422 via RJ45
Each port is individually selectable via software to be RS232 (EIA-561 DTE), RS485 or
RS422. The RJ45 port and pin-out is shown below.
Figure 21: RJ45 port pin-out
Pin
RS232 Mode
RS485 Mode
RS422 Mode
1
DSR
2
-
RX-
2
DCD
2
-
-
3
DTR
2
-
-
4
Common (Isolated) Ground
5
RXD
3
-
RX+
6
TXD
3
TX/RX +
TX +
7
CTS
2
-
-
8
RTS
2
TX/RX -
TX -
Shield
Chassis Ground
Table 8: RJ45 Port pin-out
NOTES:
1. No internal termination is provided.
2. Pins 1, 2, and 3 are connected internally. Pins 7 and 8 are connected internally. In RS232 mode, these
pins enter a high impedance state. A DTE that asserts DTR and expects DSR or DCD will operate
correctly. A DTE that asserts RTS will see CTS asserted, although the RuggedServer will not perform
hardware flow control.
3. In RS232 mode, the RJ45 ports conform to EIA-561 DTE, which transmit on TXD and receive on RXD.