38 External Connectors
VX6 Reference Guide E-EQ-VX6RG-J
Printer/PC Serial Connector (COM3)
The serial connector (labeled “COM2/3”) is an industry-standard RS-232 9-pin “D” connector.
The connector and its pin assignments are shown below. By default, Pin 9 provides RI. Pin 9
may also be configured to supply +5 VDC at 0.4A (max) for an external bar code scanner. Refer
to Chapter 4, “Scanner”, section titled “Serial Port Pin 9” for more information on configuring Pin
9.
1
5
96
Figure 2-4 Printer/PC Serial Connector (COM3)
Note: Power the VX6 off before attaching a cable or device to the COM3 serial port.
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
