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Hardware Preparation and Installation
2
The controller uses two Zilog Z85230 serial port controllers to implement the
four serial communications interfaces. Each interface supports CTS, DCD,
RTS, and DTR control signals as well as the TXD and RXD transmit/receive
data signals. Because the serial clocks are omitted in the controller’s
implementation, serial communications are strictly asynchronous. The Z85230
is interfaced as DTE (data terminal equipment) with EIA-232-D signal levels.
The serial ports are routed to four RJ45 connectors on the front panel.
This chapter provides connection diagrams for the four serial ports on the
controller. These ports are connected to external devices through cables
connected to the front panel. The figures showing this are as follows:
❏
Figure 2-2 shows the pin assignments required in a cable to adapt a
DB25 DTE device to the RJ45 connectors.
Figure 2-2. DB25-DTE-to-RJ45 Adapter
TXD
RXD
RTS
CTS
DTR
DCD
1
2
3
4
5
6
7
8
DB25 DTE DEVICE
RJ45 JACK
8
4
2
3
7
5
20
SG
Содержание MVME162LX 200 Series
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