Comtech EF Data DD2401 - Manual (Page 72)

Electrical Interfaces DD2401 Satellite Demodulator
5- 4 MN-DD2401 - Rev. G
5.6 Remote Port (J5)
The Remote Port (J5) is an RS-485 interface a single port used for remote monitor and control of
all demodulators. It is a female 9-pin D-Sub connector. Refer to Table 5-3 for connector pinouts.
Table 5-3. RS-485 Remote Port – 9-Pin Female D-Sub Connector (J5)
Pin # Signal Description Direction
1 TX-485B Transmit Data RS-485 (+) Output
6 TX-485A Transmit Data RS-485 (-) Output
8 RX-485B Receive Data RS-485 (+) Input
9 RX-485A Receive Data RS-485 (-) Input
The user must set demodulator addresses prior to connecting to remote port. Refer to
Section 5.7, “Remote Addresses”.