Remote (J20); Ethernet (J21) - Radyne DMD20 Installation And Operation Manual

Rear Panel Interfaces
13 Clear T Send B (+)
14 Send Data B (+)
15 Send Timing A (-)
16 Receive Data B (+)
17 Receive Timing A (-)
18 Modulator Fault - Open Collector
19 Request To Send B (+)
20 Data Terminal Ready A (-)
21 Demodulator Fault
22 Data Mode B (+)
23 Data Terminal Ready B (+)
24 Terminal Timing A (-)
25 No Connection

5.4.9 REMOTE (J20)

The Remote Port is a RS-485 or RS-232 Connection for remote monitor and control of the
modem. It is a 9-Pin Female "D" Connector. Refer to Table 5-5 for pinouts.
Table 5-5. Remote Port (RS-485 or RS-232) 9-Pin Female "D" Connector (J20)
Pin No.
1 Transmit Data RS-485 (+)
2 Transmit Data RS-232
3 Receive Data RS-232
4 NC
5 Ground
6 Transmit Data RS-485 (–)
7 NC
8 Receive Data RS-485 (+)
9 Receive Data RS-485 (–)

5.4.10 ETHERNET (J21)

The ETHERNET Port (J21) can be used for the Monitor & Control (M&C) Functions of the unit.
The physical interface is a standard female RJ-45 Connector.
5-10
Signal Name
DMD20/DMD20 LBST Universal Satellite Modem
CS-B
SD-B
ST-A
RD-B
RT-A
MF
RS-B
TR-A
DF
DM-B
TR-B
TT-A
---
Signal
TX-485-B
TXD-232
RXD-232
NC
GND
TX-485-A
No Connection
RX-485-B/CTS
RX-485-A
Output
Input
Output
Output
Output
Output
Input
Input
Output
Output
Input
Input
---
Direction
Output
Output
Input
---
---
Output
---
Input
Input
TM103 - Rev. 2.5