![background image](http://html1.mh-extra.com/html/keithley/7021/7021_instruction-manual_3946848030.webp)
4
Card Connections and
Installation
4-1
Introduction
WARNING
The procedures in this section are in-
tended only for qualified service person-
nel. Do not perform these procedures
unless qualified to do so. Failure to rec-
ognize and observe normal safety pre-
cautions could result in personal injury
or death.
The information in this section is arranged as follows:
•
Handling precautions
—
Explains precautions that
must be followed to prevent contamination to the card.
Contamination could degrade the performance of the
card.
•
Multiplexer connections
—
Covers the basics for con-
necting external circuitry to the connector card.
•
Digital I/O connections
—
Explains the voltage source
jumpers, pull-up resistors, output logic, and input resis-
tance and how to configure them.
•
Multi-pin (mass termination) connector card
—
Cov-
ers the basic connections to the 96-pin DIN male con-
nector and identifies each terminal.
•
Typical multiplexer connection schemes
—
Provides
some typical connection schemes for single card, two-
card and two-mainframe system configurations.
•
Typical digital I/O connection schemes
—
Provides
some typical connection schemes for output solenoid,
relay, motor, and logic device control and for input
micro-switch monitoring.
•
Model 7021 installation and removal
—
Provides the
procedures to install and remove the Model 7021 card
from the Model 7001/7002 mainframe.
Handling precautions
To maintain high impedance isolation, care should be taken
when handling the relay and connector cards to avoid con-
tamination from such foreign materials as body oils. Such
contamination can substantially lower leakage resistances,
thus degrading performance.
To avoid possible contamination, always grasp the relay and
connector cards by the side edges or shields. Do not touch
the board surfaces or components. On connectors, do not
touch areas adjacent to the electrical contacts. Dirt buildup
over a period of time is another possible source of contami-
nation. To avoid this problem, operate the mainframe and
card in a clean environment.
If a card becomes contaminated, it should be thoroughly
cleaned as explained in Section 6.
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
Summary of Contents for 7021
Page 86: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...
Page 87: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...
Page 88: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...
Page 89: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...
Page 90: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...