Keithley 2701 - General Information

1-2 Introduction Model 2701 Instrument Networking Instruction Manual
General information
Keithley's Model 2701 is the industry's first multipoint measurement and control system that
fully integrates instrument quality resolution and sensitivity with Ethernet long distance
networking capability. This allows for sensitive measurements in a distributed data acquisition
environment using long distance industry standard communications.
Using the Model 2701 can reduce networking costs by requiring only one computer, as
compared to traditional systems where separate computer/controllers may be needed with each
instrument or DAQ system. In addition, using Ethernet to control the Model 2701 provides
reliable measurements without the configuration and installation challenges of traditional
GPIB alternatives. With a Model 2701, there is no need to open a PC or install separate
communication interfaces such as GPIB boards. Just connect the Model 2701 directly to the
PC’s Ethernet port via a cross over RJ-45 cable, which is included with the Model 2701.
The Model 2701 can be controlled and provide readings over an Ethernet connection using
TCP/IP protocol. The Model 2701 contains an integral web server which provides diagnostic
control of the Model 2701 through ActiveX controls. The web pages accessed via the built-in
web server allow the user to view diagnostic information, view and edit the Instrument's
networking configuration, take and display simple readings, and send the instrument SCPI
commands and display the results. The 2701’s IP address, as well as Subnet mask, Gateway,
DHCP, among other items, can be set from the instruments front panel or over the Ethernet
connection (see
Section 3). To access this page, type the 2701’s IP address into IE's address
field (just like any other web address, but without the www, for an example, see Figure 3-2).
Full access to the instrument can be obtained via a TCP/IP socket connection. Using this
socket connection, the 2701 may be fully configured and controlled, as well as all measurement
data read. A custom software program that uses a socket connection can be written to access
the instrument. The ActiveX controls on the web page establish a socket connection to the
instrument and use it to obtain the diagnostic information, send commands, and retrieve
responses. The Instrument Driver Software also uses this socket connection.
Call Keithley or visit www.keithley.com to order a free Model 2701 application note that
discusses programming multiple 2701s using the IVI/VISA driver, as well as the direct
Windows socket interface. The requirement for network topology is a functioning Ethernet.
This can be a direct connection between a PC and a single 2701 through a cross over cable or
over a corporate LAN. This manual provides user information for isolated network
connections. For corporate LAN installations, contact your IS/IT department before making
any connections to your building’s network.