Connector panel of the BDU
98-175666-C Chapter 3: Interfaces 3-5
3.1.7 RS-422 RJ-45 connector
Use the following connector to connect the BDU to the VSAT modem
Outline Pin Signal Pin function
1 Line A RXD (+) Receive data (non-
inverting)
2 Line A RXD (-) Receive data (inverting)
3 Line B TXD (+) Transmit data (non-
inverting)
4 GND Ground
5 GND Ground
6 Line B TXD (-) Transmit data (inverting)
7 BUC Key line
(+)
Key line (non-inverting)
8 BUC Key line (-
)
Key line (inverting)
Shield PCB ground PCB ground
Table 3-7: RS-422 connector, male, outline and pin assignment
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