Installation guide

Setting up a LAN Instrument Network 5
Identifying the Required Instrument LAN
An instrument LAN consists of one or more data system computers
and instruments. This manual covers instrument LANs for the
following instruments:
• Agilent 7890A, 7820A, 6850, 6890A, 6890 Plus, and/or 6890N
Gas Chromatographs
• Agilent 35900E analog to digital converter
Identify the instrument LAN required:
• Isolated (not connected to the site LAN).
• Part of the site LAN itself, which requires coordinating PC
and instrument IP addresses with the site LAN
administrator.
Isolated LAN
Implementing a laboratory network with an isolated LAN is easy.
The isolated LAN can be set up for a single instrument or multiple
instruments.
The simplest way to attach a single instrument to a PC is by using a
network crossover cable (Figure 1). With newer instruments you set
the IP address from the instrument keypad. Older instruments
require additional software running a PC connected to the
instrument LAN to assign their IP address.
Figure 1: Simple hookup to a network
If you have multiple instruments and PCs on a LAN, connect the
instruments and PCs to a hub or switch (Figure 2).