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SDM-300A Satellite Modem
The local end cable connects the 25-pin female ASYNC connector (on either the
breakout panel or the Y cable) to the EIA-485 (2-wire) remote terminal (WYSE or laptop
computer). The pinout of the local cable is listed in the following table.
In addition, the following table lists the pinout for the WYSE terminal cable using an
EIA-232 to EIA-485 converter.
Note: Disables RD during TD.
The remote end cable connects the 25-pin female ASYNC connector (on either the
breakout panel or the Y cable) to the 9-pin female connector, J6, at the rear of the
modem. The pinout of the remote cable is listed in the following table.
Rev. 4
#7. Local End EIA-485 (2-Wire)
9-Pin
Female Connector
Male Connector
TX/RX+
4
14, 16
TX/RX-
5
2, 3
#7. Local End WYSE Cable With Converter
25-Pin
Male Connector
Male Connector
TX-/RX-
2, 5
TX+/RX+
14, 17
(See Note)
18, 21
#7. Remote End EIA-232
9-Pin
Male Connector
Male Connector
RX
2
TX
3
GND
5
25-Pin
TX+/RX+
TX-/RX-
9-Pin
5
TX/RX-
4
TX/RX+
25-Pin
2
RX
3
TX
7
GND
Options
A–37
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