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Installation
2.6.3 4 x RS232/RS485/RS422 via DB9
The figure below shows the RS400 when equipped with four RS232/RS485/RS422 DB9
ports.
Figure 18: RS400 equipped with four RS232/RS485/RS422 DB9 ports
Each port is individually selectable via software to be RS232, RS485 or RS422. The
DB9 port is below.
Figure 19: DB9 Female DCE Port pin-out
Pin
RS232 Mode
RS485 Mode
RS422 Mode
1 CD
-
-
2 TX TX/RX+ TX+
3 RX
-
RX+
4 DTR
-
-
5
Common (Isolated Ground)
6 DSR
-
RX-
7 CTS TX/RX
- TX-
8 RTS
-
9
RI (No
Connection)
- -
Shield Chassis
Ground
Table 3: DB9 Female DCE Port pin-out
NOTES:
1. No internal termination is provided.
2. Pins 1, 4, and 6 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 CD will operate correctly. A DTE that asserts RTS will see CTS
asserted, although the RuggedServer will not perform hardware flow control.
3. The Common terminals are optically isolated; however, there is transient voltage
protection circuitry between the Common terminals and chassis ground.
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RuggedCom
®
RuggedServer™
RS400 Family Installation Guide rev109