Comtech EF Data Vipersat SLM-5650A, Installation And Operation Manual

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SLM-5650A Satellite Modem
Revision 10
Rear Panel Connectors 4–8 MN-SLM-5650A
Item
No.
Name Description
7 ‘P1 Overhead Data’
(DB-25M) Interface
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 Name
1 EIA-422 Transmit Data “A”, Input TX Data A
14 EIA-422 Transmit Data “B”, Input TX Data B
2 EIA-422 Transmit Clock “A”, Output TX Clk A
15 EIA-422 Transmit Clock “B”, Output TX Clk B
3 EIA-422 Transmit Byte Sync “A”, Output TX Sync A
16 EIA-422 Transmit Byte Sync “B”, Output TX Sync B
4 EIA-422 Receive Data “A”, Output RX Data A
17 EIA-422 Receive Data “B”, Output RX Data B
5 EIA-422 Receive Clock “A”, Output RX Clk A
18 EIA-422 Receive Clock “B”, Output RX Clk B
6 EIA-422 Receive Byte Sync “A”, Output RX Sync A
19 EIA-422 Receive Byte Sync “B”, Output RX Sync B
7 Shield Ground
20 EIA-485 Transmit Data “-“ 485 TX Data -
8 EIA-485 Transmit Data “+” 485 TX Data +
21 EIA-422 Transmit Handover Sync “A”, Input THS A
9 EIA-485 Receive Data “-“ 485 RX Data -
22 EIA-485 Receive Data “+” 485 RX Data +
10 EIA-422 Transmit Handover Sync “B”, Input THS B
23 EIA-232 Clear to Send 232 CTS
11 EIA-232 Receive Data 232 RX Data
24 EIA-232 Request to Send 232 RTS
12 EIA-232 Transmit Data 232 TX Data
25 EIA-422 Transmit Handover Control “A”, Input THC A
13 EIA-422 Transmit Handover Control “B”, Input THC B
* For EIA-485 2-Wire Operation, only two wires are required
•
Tie pins 8 and22 together (both +)
•
Tie pins 9 and 20 together (both -)