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Installation
2.6.1 4 x RS232 via DB9
The figure below shows the RS400 when equipped with four RS232 DB9 ports.
Figure 14: RS400 equipped with four RS232 DB9 ports
When equipped with four RS232 ports, the RS400 Series offers a female Data
Communications Equipment (DCE) interface. When communicating with a Data
Terminal Equipment (DTE) device, such as a PC, a straight-through serial cable (3 pin or
9 pin) is required. When communicating with a DCE, such as another RS400, the RX
and TX must be 'crossed-over', for example, using a NULL modem cable. The RS232
pin-out is shown below.
Pin
1
No Connection
2
Transmit Data
3
Receive Data
4
No Connection
5
COM (Isolated Ground)
6
No Connection
7
No Connection
8
No Connection
9
No Connection
Figure 15: DB9 Female DCE pin-out
®
RuggedCom
Signal
19
RuggedServer™ RS400 Family Installation Guide rev109
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