Comtech EF Data SLM-5650A Installation And Operation Manual page 72

Item
Name
No.
7 'P1 Overhead Data'
(DB-25M) Interface
Rear Panel Connectors
This Type 'D' 25-pin male (DB-25M) connector allows for connection of the
EIA-422, EIA-485 and EIA-232 data interfaces used with overhead framing. It also
supports signaling for tactical applications.
Pin # Signal Function
1 EIA-422 Transmit Data "A", Input
14 EIA-422 Transmit Data "B", Input
2 EIA-422 Transmit Clock "A", Output
15 EIA-422 Transmit Clock "B", Output
3 EIA-422 Transmit Byte Sync "A", Output
16 EIA-422 Transmit Byte Sync "B", Output
4 EIA-422 Receive Data "A", Output
17 EIA-422 Receive Data "B", Output
5 EIA-422 Receive Clock "A", Output
18 EIA-422 Receive Clock "B", Output
6 EIA-422 Receive Byte Sync "A", Output
19 EIA-422 Receive Byte Sync "B", Output
7 Shield
20 EIA-485 Transmit Data "-"
8 EIA-485 Transmit Data "+"
21 EIA-422 Transmit Handover Sync "A", Input
9 EIA-485 Receive Data "-"
22 EIA-485 Receive Data "+"
10 EIA-422 Transmit Handover Sync "B", Input
23 EIA-232 Clear to Send
11 EIA-232 Receive Data
24 EIA-232 Request to Send
12 EIA-232 Transmit Data
25 EIA-422 Transmit Handover Control "A", Input
13 EIA-422 Transmit Handover Control "B", Input
* For EIA-485 2-Wire Operation, only two wires are required
Tie pins 8 and22 together (both +)
•
Tie pins 9 and 20 together (both -)
•
4–8
SLM-5650A Satellite Modem
Description
TX Data A
TX Data B
TX Clk A
TX Clk B
TX Sync A
TX Sync B
RX Data A
RX Data B
RX Clk A
RX Clk B
RX Sync A
RX Sync B
Ground
485 TX Data -
485 TX Data +
THS A
485 RX Data -
485 RX Data +
THS B
232 CTS
232 RX Data
232 RTS
232 TX Data
THC A
THC B
Revision 10
Name
MN-SLM-5650A