Comtech EF Data DT-4500-A Series - Manual (Page 57)

DT-4500-A Series Downconverters Revision 1
Rear Panel Connectors MN-DT4500A
3–7
3.2.2.1 J3 | HSB (High Speed Bus) Connector (DB-25F)
The J3 | HSB connector is a Type “D” 25-pin female (DB-25F)
connector that is provided on all switch modules. The mating
connector is a DB-25M connector. The pinout specifications are
provided in Table 3-7.
Note: This connection does not employ a “straight-through” cable assembly. Contact Comtech
EF Data for detailed wiring drawings when cabling between downconverters.
Table 3-7. J3 HSB Interface Connector Pinout
Pin # Description
1 Cntl_12
2 Cntl_10
3 Cntl_8
4 Cntl_6
5 Cntl_4
6 Cntl_2
7 Cntl_In
8 +14V Out
9 +14V In
10 Aux_3
11 Aux_1
12 -Rx/Tx
13 GND
14 Cntl_11
15 Cntl_9
16 Cntl_7
17 Cntl_5
18 Cntl_3
19 Cntl_1
20 +14V Out
21 +14V In
22 GND
23 Aux_2
24 GND
25 +Rx/Tx