Rs232/Rs485/Rs422 Via Rj45; Figure 21: Rj45 Port Pin-Out; Table 8: Rj45 Port Pin-Out - RuggedCom RuggedServer RS416 Family Installation Manual

Serial Ports

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
1 DSR
2 DCD
3 DTR
4
5 RXD
6 TXD
7 CTS
8 RTS
Shield

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.
®
RuggedCom
RS485 Mode
2
-
2
-
2
-
Common (Isolated) Ground
3
-
3
TX/RX +
2
-
2
TX/RX -
Chassis Ground
27
RuggedServer™ RS416 Family Installation Guide rev118
RS422 Mode
RX-
-
-
RX+
TX +
-
TX -