DAVIS Vantage Pro2 Manual page 14

Local Computer Installation
Serial Port Connection
These instructions explain how to make a typical local connection between
your Envoy and your computer via a serial port. Note that if you extend the
cable run beyond 48' (14.4 m), the software may have difficulty communicat-
ing with the station.
1. Locate a free serial port on the back of your computer and connect the blue
DB9 adapter to the port, then connect the 8' cable to the adapter.
2. Plug the short cable coming from the data logger into the 8' cable.
The connection between the Envoy and the computer can be extended up to
40' (12m) using a Davis Standard 4-conductor extension cable (#7876-
040).
Note: Do not attempt to use more than 40' of extension cable, or the data logger may have
difficulty communicating with the computer. Warning: Do not use phone cable. Our
cable looks like a phone cable but it is wired differently
Optional 40' (12 m) 4-Conductor
Extension Cable and Coupler
Note: The data logger does not require a constant connection with a computer to continue
logging and storing data. Although the data logger should remain connected to the
Envoy at all times, the data logger only needs to be connected to the computer when
data is being downloaded or when the computer is actively using data from the data
logger. The data logger and Envoy can be disconnected from the computer if the
Envoy is placed in a location where the data logger cable cannot reach. However,
WeatherLink's bulletin, summary, or other real-time window displays are only acces-
sible if the Envoy is attached to the computer.
12
9-Pin
Connector
(DB-9)
8' (2.5 m) Cable
Weather Envoy
Data Logger
AC Power
Adapter