20 External Connectors
VX5 Reference Guide E-EQ-VX5RG-G-ARC
Scanner Serial Connector (COM1)
The serial connector, with a SCANNER label, (configured as COM1) is industry-standard RS-
232. The connector includes a PC/AT standard 9–pin “D” male connector. Jumpers on the system
board control the function of pin 9. Pin 9 is capable of supplying +5 VDC at 0.4A (max) for an
external bar code scanner. Refer to Chapter 3: “System Configuration” section titled “Serial Port
Pin 9” for more information on configuring pin 9.
If COM1 is not being used for a scanner, it can also be used for screen blanking when the vehicle
is in motion. Please see “Technical Specifications – Screen Blanking Cable” in the following
section for more details.
1
5
96
Figure 2-3 Scanner Serial Connector (COM1)
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 +5VDC
or
RI
Barcode Scanner Power – 400mA max (Default)
or
Ring Indicator – Input
Shell CGND Chassis Ground
Note: Pin 9 of the COM port can be switched between +5V and RI. See Chapter 3: “System
Configuration” section titled “Serial Port Pin 9”.
