15. Ethernet connection
specification
The Ethernet connection enables data download from a DTR to a computer. The connection
works both directly between DTR and computer or through a hub or switch, local area
network (LAN), wireless network (WLAN) or fiber Ethernet.
Any type of computer (for example PC, Mac, PDA, mainframe) with a compatible network
connection can be configured to download data from the DTR. This document gives all the
specifications necessary to write a communications program for downloading purposes. It is
also possible to get a ready-to-install communications software from Vaisala.
More information
‣
Sensor verification certificate (page 246)
15.1 Cable requirements and connection
15.1.1 Ethernet cable specification
The DTR uses a standard Ethernet cable (10/100BASE-T Cat 5e UTP cable with RJ45
connectors). The maximum cable length is 100 m.
Ethernet connection is similar to that of a computer/PC: Use a cross-over Ethernet cable to
connect the DTR directly to a computer, as shown in the figure below. If you are connecting
the DTR to a LAN (Local Area Network) through a wall socket, use straight-through Ethernet
cable, as shown in the following figure.
PROCESS INSTRUMENTS
POWER
Ethernet cable
Cat 5 or Cat 6
Figure 120 Connecting DTR to computer
Chapter 15 – Ethernet connection specification
227
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