Comtech EF Data DT-4500-A Series - Manual (Page 55)

DT-4500-A Series Downconverters Revision 1
Rear Panel Connectors MN-DT4500A
3–5
3.2.1.7 J1 | COM1 EIA-485/232 Interface Connector (DB-9F)
The J1 | COM1 EIA-485/EIA-232 Interface connector is a 9-pin Type "D"
female (DB-9F) connector. The mating connector is a DB-9M connector.
The pinout specification for EIA-485 2-Wire is provided in Table 3-4; EIA-
485 4-wire is provided in Table 3-5; the specification for EIA-232 is
provided in Table 3-6.
Pin # Description
1
2 TD; Transmit Data
3 RD; Receive Data
4
5 GND; Ground
6
7
8
9
3.2.1.8 Chassis Ground Connector
A #10-32 stud is used for connecting a common chassis ground among
equipment.
Note: The AC power connector provides the safety ground.
Table 3-4. J1 – 2-Wire EIA-485 Pinout Table 3-5. J1 – 4-Wire EIA-485 Pinout
Pin # Description
1 GND; Ground
2
3
4 +RX/TX; Signal
5 -RX/TX; Signal Complement
6
7
8 +RX/TX; Signal
9 -RX/TX; Signal Complement
Note: Pins 8 and 9 are the loop to the next
downconverter
Pin # Description
1 GND; Ground
2
3
4 +TX; Signal
5 -TX; Signal Complement
6
7
8 +RX; Signal
9 -RX; Signal Complement
Table 3-6. J1 – EIA-232C Pinout