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