Comtech EF Data DD2401 VME - Manual (Page 73)

DD2401 VME L-Band Demodulator Card Installation & Operational Manual Rear Panel Interfaces
MN-VME2401 – Rev. B 5-5
Table 5-5. RS-485 Remote Port – 9-Pin Female D-Sub Connector (J5)
Pin # Signal Description Direction
1 TX-485B Transmit Data RS-485 (+) Output
5 GND Ground ---
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”.
5.7 Remote Addresses
The demodulator supports up to 16 different remote addresses. Refer to Tables 5-6 and 5-7 for
S1 DIP Switch settings. The S1 DIP switch is located on the main board.
Table 5-6. S1 DIP Switch
Position
1
Position
2
Position
3
Position
4
Address in
Decimal
off off off off 32 (default)
on off off off 33
off on off off 34
on on off off 35
off off on off 36
on off on off 37
off on on off 38
on on on off 39
off off off on 40