Keithley 7021 Instruction Manual page 37

Card Connections and Installation
Typical connection techniques
All external circuitry, such as instrumentation and DUTs,
that you wish to connect to the card must be terminated with
a single 96-pin female DIN connector. The following con-
nection techniques provide some guidelines and suggestions
for wiring your circuitry.
WARNING
Before beginning any wiring proce-
dures, make sure all power is off and
any stored energy in external circuitry is
discharged.
WARNING
When wiring a connector or device
under test, do not leave any exposed
wires or connections. No conductive
part of the circuit may be exposed. Prop-
erly cover the conductive parts, or death
by electric shock may occur.
A)
B)
C)
Figure 4-10
Typical round cable connection techniques
4-8
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
Multi-Pin
Connector
Card
7011-MTC-2
cable
assembly
Multi-Pin
Connector
Card
7011-MTC-2
(Cut in Half)
Multi-Pin
Connector
Card
7011-Kit-R
Connector Kit
Notes: Figure 4-12 provides an exploded view showing
how the connector (with cable) is assembled.
Cable Hitachi p/n N2807-P/D-50TAB is a
50-conductor cable. Two of these cables
can be used to supply 100 conductors.
NOTE
It is recommended that external circuitry
be connected (plugged in) after the Model
7021 is installed in the Model 7001/7002
mainframe and with the mainframe power
off. Installation is covered at the end of
this section.
Output relays  The multi-pin connector card uses a relay
for each of the output banks. These output relays are normal-
ly open to prevent any hazardous voltages (via the main-
frame backplane) from appearing on the pins of the male
DIN connector. The output relays will only close when the
Model 7011-MTC-2 cable assembly is connected to the card.
If building your own cable assembly, you must make sure
that it shorts pins 1a to 1b of the card connector (Figure 4-11)
when it is mated to the card. Shorting pins 1a to 1b allows the
output relays to close.
Round cable assemblies  Figure 4-10 shows typical
round cable connection techniques using accessories avail-
able from Keithley.
Wire instrumentation
and DUT to bulkhead
connector (See Table 4-2
and Figures 4-9 and 4-11
for terminal identification)
7011-MTR
bulkhead connector
Wire directly to
instrumentation
and DUT
Wire directly to
instrumentation
and DUT
Cable