Basic Mairix Configurations - Keithley 7071 Instruction Manual

OPERATION
WARNING
To avoid electrical shock which could result in
injury or death, make sure all power is off and
stored energy in external circuitry is dischag-
ed before making any connections to the matrix
card.
A. There are two cable clamps on the rear panel of the
matrix card that serve as strain reliefs for terminal
block wires. Loosen the two screws of each cable
clamp and remove the top half of each clamp.
B. Install the pre-wired terminal blocks (see paragraph
2.52) on the matrix card. Make sure the pins on the
card are properly mated to the terminal blocks.
C. Route the wires through the rear panel cable clamps.
Make sure there is some slack in the wires between
the terminal blocks and the clamps before tightening
the clamps.
5. Slide the matrix card all the way into the mainframe and
tighten the two spring loaded panel fastenters.
WARNING
The mounting screws must be secured to en-
sure a proper chassis ground connection be-
twsen the card and the mainframe. Failum to
properly secure this ground connection may
result in petsonal injury or death due to elec-
tric shock.
NOTE
If using the terminal blocks, leave enough slack
in the external cabling so that the card can slide
out far enough to gain access to the connections.
6. To remove the card from the mainframe make sure the
Model 707 is off, power is removed from external cir-
cuitry, and then reverse the above procedure.
2.4 BASIC MATRIX CONFIGURATIONS
A simplified schematic of the Model 7071 8 x I2 matrix
card is shown in Figure 2-3. Each of the 96 crosspoints is
made up of a three-pole switch. In this simple configura-
tion, any row can be connected to any column by closing
the appropriate crosspoint switch. The columns of every
Model 7071 matrix card are numbered 1 through l2.
However, the actoal column numbers of the matrix are
determined by which mainframe slot the card is installed
in. For example, the columns of a matrix card installed in
slot 4 of the mainframe are numbered 37 through 48. Col-
umn number assignments for all six mainframe slots are
listed in Table 2-l.
Table 2-1. Column Number Assignments
Matrix
7Wl Card Location
CoIumn Numbers
I
2-2