18 • Chapter 3: Installation
AirLink 9850 Gas Monitor Operator’s Manual
USB Virtual COM Port Connection
The USB port outputs Modbus data in the format shown on page 41. A USB A male to USB B male
cable is required to connect the AirLink 9850 to a Windows PC. A Modbus polling software installed
on a Windows PC can be used to read that data.
1. Connect the USB B port on a USB A to USB B cable to the USB port on the AirLink 9850.
Figure 9: Connecting a USB Cable
2. Connect the USB A port on the cable to an available USB port on the Windows PC.
3. The drivers for the AirLink 9850 will automatically install once the AirLink 9850 is turned on. See
page 42 for more information about utilizing the virtual COM port.