Keithley 7022, Instruction Manual

Page: 36 / 107

Card Connections and Installation
4-2
Matrix connections
The following paragraphs provide the basic information
needed to connect your external test circuitry to the matrix.
The removal/installation of the backplane row jumpers on
the relay card and detailed information on the connector card
is included.
WARNING
The following connection information is
intended to be used by qualified service
personnel. Failure to recognize and
observe standard safety precautions
could result in personal injury or death.
Backplane row jumpers
The Model 7001/7002 mainframe has an analog backplane
that allows the matrix rows of a Model 7022 to be internally
connected to a compatible switching card installed in the
adjacent slot. (See Section 2 for details.)
The backplane row jumpers for the card are located on the
relay card as shown in Figure 4-1. The card is shipped from
the factory with the jumpers installed.
Figure 4-1
Backplane row jumpers
Jumper removal
Perform the following steps to remove the backplane row
jumpers:
1. If mated together, separate the relay card from the con-
nector card by removing the mounting screw and then
pulling the two cards away from each other. Remember
to only handle the cards by the edges and shields to
avoid contamination.
2. Use Figure 4-1 to locate the jumper(s) to be removed.
3. It is not necessary to physically remove the jumpers
from the PC board. Using a pair of wire cutters, cut one
lead of each jumper.
Jumper installation
Referring to Figure 4-1 for jumper locations, perform the fol-
lowing steps to install the backplane row jumpers:
1. If mated together, separate the relay card from the con-
nector card by removing the mounting screw and then
pulling the two cards away from each other. Remember
to only handle the cards by the edges and shields to
avoid contamination.
2. Physically remove a cut jumper by unsoldering it from
the PC board.
3. Install a new #22 AWG jumper wire (Keithley P/N J-15)
and solder it to the PC board.
4. Remove the solder flux from the PC board. The cleaning
procedure is explained in Section 6.
Digital I/O connections
Voltage source jumper
Digital output high uses the in5V source as the high
logic level. If higher voltages are required, a user-supplied
voltage can be used (42V maximum). At the factory, the
internal jumper is set to use the in5V source.
W100
W101
W102
W103
W104
W105
W106
W107
7022 Relay Card
Jumpers
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