Radicom Research Inc RB9500 Manual De Usuario
RB9500
Designer’s
Guide
(01-30-16)
10
RB9500MB Main Board RS232 DB9 Pin Definitions
The pin definitions of DB9 used on the RB9500MB RS232 Serial Connector are as follows:
1. DCD: Input, Carrier Detect
2. RXD: Input, Received Data
3. TXD: Output, Transmit data
4. DTR: Output, Data Terminal ready
5. GND: Ground
6 DSR: Input, Data Set Ready
7. RTS:
Output, Request to Send
8. CTS:
Input, Clear to Send
9. RI: Input, Ring Indicator