9 monitor and control connectors j20, j21 – Comtech EF Data DMD-2050E User Manual
Page 162
DMD2050E Universal Satellite Modem
External Connections
MN-DMD2050E Revision 2
5–10
5.3.9 Monitor and Control Connectors J20, J21
Label
Description
Connector Type
REMOTE J20
Remote Monitor and Control Port (RS-485 or RS-232) 9-pin Female D
ETHERNET J21 Ethernet Monitor and Control Port
Female RJ-45
Table 5-7. Pinouts for J20 REMOTE Port (RS-485 or RS-232) 9-pin Female D Connector
Pin No. Signal Name
Signal
Direction
1
Transmit Data RS-485 (+) TX-485-B
Output
2
Transmit Data RS-232
TXD-232
Output
3
Receive Data RS-232
RXD-232
Input
4
NC
NC
---
5
Ground
GND
---
6
Transmit Data RS-485 (–) TX-485-A
Output
7
NC
No Connect
---
8
Receive Data RS-485 (+) RX-485-B/CTS Input
9
Receive Data RS-485 (–) RX-485-A
Input