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14 External Connectors
RX2 Reference Guide E-EQ-RX2RG-B
COM3/RS-232 Connector
A D9 connector, labeled “RS2/COM3” is provided on the RX2. This serial connection can be
used for FTP connections to another computer. The serial connection cannot be used for
ActiveSync.
1
5
96
Figure 2-4 The RS/232 Serial Connector (COM3)
Pinout
Pin Signal Description
1 DCD Data Carrier Detect – Input
2 RXD Receive Data – Input
3 TXD Transmit Data – Output
4 DTR Data Terminal Ready – Output
5 GND Signal/Power Ground
6 DSR Data Set Ready – Input
7 RTS Request to Send – Output
8 CTS Clear to Send – Input
9 RI
or
+5VDC
Ring Indicator – Input (default)
or
Bar Code Scanner Power – 400mA max
Shell CGND Chassis Ground
Serial Cable
COM3/RS-232
9000A054CBL6D9D9
Port Label on RX2