Rs232/Rs485/Rs422 Via Db9; Figure 19: Db9 Female Port Pin-Out; Table 6: Db9 Female Dce Port Pin-Out - RuggedCom RuggedServer RS416 Family Installation Manual

Serial Ports

3.2 RS232/RS485/RS422 via DB9

Each port is individually selectable via software to be RS232, RS485 or RS422. The
DB9 port pin-out diagram and listing are shown below.

Figure 19: DB9 female port pin-out

Pin RS232 DCE Mode
1
2
3
4
5
6
7
8
9
Shield

Table 6: DB9 Female DCE Port pin-out

NOTES:
1. No internal termination is provided.
2. In RS232 mode, pins 1, 4, and 6 are connected internally, and pins 7 and 8 are connected internally.
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. RI is not connected
4. In RS232 DCE mode, ports transmit to DTE devices on pin 2 and receive from DTE on pin 3.
®
RuggedCom
RS485 Mode
2
DCD
4
TX TX/RX+
4
RX
2
DTR
Common (Isolated) Ground
2
DSR
2
RTS TX/RX-
2
CTS
3
RI
Chassis Ground
25
RuggedServer™ RS416 Family Installation Guide rev118
RS422 Mode
- -
TX+
- RX+
- -
- RX-
TX-
- -
- -