Specifications

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CHAPTER 2: Introduction
2.5 Connector Pin Assignments
Table 2-1. RS-232 signals (DB9 male).
Signal Name Pin # Mode
TD Transmit Data 3 Output
RTS Request to Send 7 Output
GND Ground 5 —
RD Receive Data 2 Input
CTS Clear to Send 8 Input
NOTE
These assignments meet EIA/TIA/ANSI-232E DTE
standards.
Table 2-2. RS-422/485/530 pin assignments (DB9 male).
Signal Name Pin # Mode
GND Ground 5 —
TX+ Transmit Data Positive 4 Output
TX- Transmit Data Negative 3 Output
RTS+ Request to Send Positive 6 Output
RTS- Request to Send Negative 7 Output
RX+ Receive Data Positive 1 Input
RX- Receive Data Negative 2 Input
CTS+ Clear to Send Positive 9 Input
CTS- Clear to Send Negative 8 Input