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Synchronous Serial Cables
FIGURE 13.
Synchronous Null-Modem Cable for 800S+ cards
Note that the cable in Figure 13 must have the clock source side
connected to the controller card.
Cabling for the 401S+ Card
The Model 401S+ Communications Controller features a new
processor that allows all clock signals to be brought out on their
standard pins. This simplifies cabling.
Note: A single clock source must supply both ports.
Connecting Synchronous Modems
to 401S+ Cards. Since all clock signals are brought out on
their standard pins, you can use the straight-through modem
cables shown in Figure 14 to connect synchronous modems to
the 401S+ card. No adaptors are necessary.
DTE Controller
Connector
TXD
2
3
RXD
RTS
4
CTS
5
DSR
6
GND
7
DCD
8
TxCin 15
RxCin 17
DTR 20
TxCout 24
FIGURE 14.
Modem
Cable
DCE Modem
Connector
2
TXD
3
RXD
4
RTS
5
CTS
6
DSR
7
GND
8
DCD
15
TxCin
17
RxCin
20
DTR
24 TxCout
Straight-through synchronous modem cable.
Connecting Other Synchronous Devices
to 401S+ Cards. Figure 15 shows the null-modem cable design
for connecting 401S+ cards to synchronous DTE devices.
Comet and Galaxy Series Multiport Controllers
59