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Printer / PC Serial Connector (COM3)
Power the VX7 off before attaching a cable to any port (serial, keyboard, Ethernet/USB, etc.).
The serial connector, labeled “COM2/3”, is industry-standard RS-232. The connector includes a PC/AT standard 9–pin “D”
male connector.
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.
If COM3 is not being used for a scanner, it can also be used for screen blanking when the vehicle is in motion.
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
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