ZETRON 2000 Series Especificaciones descargar pdf (Pagina 124)

Multiport Serial TAP Input

124 025-9035AA

Multiport Configurations

950-9197 - Additional Serial Port Pair

Each one of these options adds two serial ports to the 950-9196 (702-9191 card), by

adding a pair of chips to the board. Table 10 shows the four possible configurations.

Table 12: Multiport Card Serial Port Configurations

Note that the software needs to be changed to match the hardware, as discussed in the

previous section. This affects the image, config.cds, and oparam.cds files. The hardware

and software should be updated at the same time.

Observe proper anti-static parts handling precautions when handling the chips.

When you first turn it on, the Chan 1 - Chan 8 lights on the front panel of the Multiport

card should show how many ports are installed - 2, 4, 6, or 8. (Once it is running, these

lights show activity instead).

Connecting Multiport Hardware to RS-232 Connectors

There are two basic classes of devices that use serial interfaces such as RS-232C. The two

classes are known as DTE and DCE. The first, DTE, stands for Data Terminal Equipment

and comprises of equipment that functions as a source and/or sink for digital data. This

includes computers, data terminals, and printers. The second class is DCE, which stands

for Data Communication Equipment, and includes devices such as modems, DDS

telephone connections, and satellite earth stations.

The primary standard for serial device interconnections is EIA RS-232-C, usually

shortened to simple RS232. Confusion may arise over the signals presented at the pins of

various devices, especially transmit and receive data. This occurs because the signals line

functions are referenced to DTE. This means that the TX pin is always pin 2, even though

pin 2 on a modem (a DCE) is accepting serial data into the modem.

The pin-outs for the two common RS-232C connector styles are listed in Table 13 and

Table 14. An “I” after the pin number means that the signal is an input, while an “O”

means that the signal is an output from the port. Non-signal pins, such as ground, have no

letter after the pin number.

#Ports

Dual UARTs in

(2681, 321-2181)

RS-232 Drivers in

(14506, 317-5406)

2 (base) U3 U1, U2, U8

4 U3, U9 U1, U2, U8, U14

6 U3, U9, U16 U1, U2, U8, U14, U20

8 U3, U9, U16, U21 U1, U2, U8, U14, U20, U15

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 375 376

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ZETRON 2000 Series Especificaciones Pagina 124