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146 34980A User’s Guide
5 Matrix Switch Modules
34931A D-Sub Connectors
Matrix 1
Matrix 2
For orientation, the D-sub connector
end of the module is facing you.
Matrix 1 Matrix 2
12 3 4 5 6 7 8 91011121314151617
NC
C4H C4L
NC NC
R4H R4L
C5H C5L
NC NC NC NC
C7H C7L
NC NC
18
19 20
21 22
23
24
25 26
27 28 29 30 31 32
33
C2L
NC NC NC NC NC
C2H
NC NC
R2H R2L C8H C8L
NC NC
GND
NCNC
C3H C3L C1H C1L R3H R3L C6H C6L
NC NC NC
NC NC
R1H R1L
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
NOTE: In this diagram and the table
below, R represents “row,” and C
represents “column.”
Description Pin Description Pin Description Pin
R1H 49 C2H 23 C7H 13
R1L 50 C2L 24 C7L 14
R2H 27 C3H 35 C8H 29
R2L 28 C3L 36 C8L 30
R3H 39 C4H 1 GND 33
R3L 40 C4L 2 No Connect pins:
3-4, 9-12, 15-22,
25-26, 31-32, 34,
and 43-48.
R4H 5 C5H 7
R4L 6 C5L 8
C1H 37 C6H 41
C1L 38 C6L 42
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
NCNC
C3H C3L C1H C1L R7H R7L C6H C6L
NC NC NC
NC NC
R5H R5L
12 3 4 5 6 7 8 91011121314151617
Interlock
C4H C4L
NC NC
R8H R8L
C5H C5L
NC NC NC NC
C7H C7L
NC NC
18
19 20
21 22
23
24
25 26
27 28 29 30 31 32
33
C2L
NC NC NC NC NC
C2H
NC NC
R6H R6L C8H C8L
NC NC
Interlock
NOTE: In this diagram and the table
below, R represents “row,” and C
represents “column.”
Description Pin Description Pin Description Pin
R5H 49 C2H 23 C7H 13
R5L 50 C2L 24 C7L 14
R6H 27 C3H 35 C8H 29
R6L 28 C3L 36 C8L 30
R7H 39 C4H 1 Interlock 17
R7L 40 C4L 2 Interlock 33
R8H 5 C5H 7 No Connect pins:
3-4, 9-12, 15-16.
18-22, 25-26, 31-32,
34, 43-48
R8L 6 C5L 8
C1H 37 C6H 41
C1L 38 C6L 42
WARNING:: As a safety feature,
interlock pins (17 and 33) must be
shorted to enable the Analog Bus
relays, which are on Matrix 2, to close.
The optional 34931T terminal block
shorts these pins for you. This feature
protects inadvertent routing of high
voltages from the Analog Buses to the
D-sub connector of the module.
WARNING