Rs-232 Wiring Diagrams - Digi XTend User Manual

The following table provides the RS-232 signals and their implementations on the Module Assembly. Low-asserted
signals have a horizontal line over the pin name.
DB-9 RS-232
pin name
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS /
CMD
8 CTS
9 RI

RS-232 wiring diagrams

The following diagram shows the DTE device (RS-232, male DB-9 connector) wired to a DCE Module Assembly (female
DB-9).
XTend RF Module User Guide
XCTU
name Description
GPO2 Data-Carrier-
Detect
DOUT Received Data
DIN Transmitted Data
GPI2 Data-Terminal-
Ready
- Ground Signal
GPO2 Data-Set-Ready
GPI1 Request-to-Send/
Command Mode
GPO1 Clear-to-Send
- Ring Indicator
Implementation
Connected to DSR (pin6 of DB-9)
Serial data exiting the Module Assembly (to host)
Serial data entering into the Module Assembly (from
host)
Can enable power-down on the Module Assembly
Ground
Connected to DCD (pin1 of DB-9)
Provides RTS flow control or enables Command mode
Provides CTS flow control
Optional power input that is connected internally to
the positive lead of the front power connector
RS-232 wiring diagrams
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