Comtech EF Data LBC-4000 - Manual (Page 43)

LBC-4000 L-Band Up/Down Converter System with Ethernet Revision 2
Rear Panel Connections MN-LBC4000A
3–9
3.2.2.4 J1 | COM1 (EIA-485/232 Interface) Connector (DB-9F)
The J1 | COM1 EIA‐485/232 Interface is a 9‐pin Type "D" female (D‐9F)
connector. The tables that follow provide the connector pinouts for the
EIA‐485 2‐Wire or 4‐Wire interfaces, and the EIA‐232 interface.
Table 3-3. J1 | COM1 2-Wire
EIA-485 Interface Connector
Pinouts
Table 3-4. J1 | COM1 4-Wire
EIA-485 Interface Connector
Pinouts
Pin # Description Pin # Description
1 GND (Ground) 1 GND (Ground)
6 6
2 2
7 7
3 3
8 +RX/TX (Signal) 8
4 +RX/TX (Signal) 4 +TX (Signal)
9 -RX/TX (Signal Complement) 9
5 -RX/TX (Signal Complement) 5 -TX (Signal Complement)
Note: Pins 8 & 9 are the loop to
the next converter.
Table 3-5. J1 | COM1 EIA-232 Interface
Connector Pinouts
Pin # Description
1
6 DSR (Unit Ready) – always high
2 TD (Transmit Data)
7 RTS (Request to Send) – Looped to CTS
3 RD (Receive Data)
8 CTS (Clear to Send)
4
9
5 GND (Ground)