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L4433A Dual/Quad 4x8 Reed Matrix 5
L4400 User’s Guide 125
L4433A D-Sub Connectors for One-Wire Mode
Matrices 1 and 2
Matrices 3 and 4
For orientation, the D-sub connector
end of the module is facing you.
Matrices 3 & 4Matrices 1 & 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
NC
1C4 2C4 1R4 2R4
1C5 2C5
NC NC
1C7 2C7
1C4
bypass
2C4
bypass
1C5
bypass
2C5
bypass
1C7
bypass
2C7
bypass
18
19 20
21 22
23
24
25 26
27 28 29 30 31 32
33
2C2
NC
1C2 1R2 2R2 1C8 2C8
NC NC
GND
1C3
bypass
2C1
bypass
1C1
bypass
2C3
bypass
2C6
bypass
1C6
bypass
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
2C6
NC
1C3 2C3 1C1 2C1 1R3 2R3 1C6
NC 1R1 2R1NC
1C2
bypass
2C2
bypass
1C8
bypass
2C8
bypass
50-Pin D-Sub
Male Connecto
r
Description Pin Description Pin Description Pin Description Pin Description Pin
1R1 49 1C2 23 1C7 13 1C4 bypass 3 GND 33
1R2 27 2C2 24 2C7 14 2C4 bypass 4 No connect pins:
11-12, 17-18,
31-32, 34, and
45-46
1R3 39 1C3 35 1C8 29 1C5 bypass 9
1R4 5 2C3 36 2C8 30 2C5 bypass 10
2R1 50 1C4 1 1C1 bypass 21 1C6 bypass 25
2R2 28 2C4 2 2C1 bypass 22 2C6 bypass 26
2R3 40 1C5 7 1C2 bypass 43 1C7 bypass 15
2R4 6 2C5 8 2C2 bypass 44 2C7 bypass 16
1C1 37 1C6 41 1C3 bypass 19 1C8 bypass 47
2C1 38 2C6 42 2C3 bypass 20 2C8 bypass 48
NOTE: Conventions for these
drawings and tables as they
relate to pinout information:
• 2R4 means Matrix 2, Row
4.
• 1C5 means Matrix 1,
Column 5
• 4C2 bypass means: Matrix
4, Column 2, and the
connection bypasses the
100Ω in-rush resistor that
protects the reed relays
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
18
19 20
21 22
23
24
25 26
27 28 29 30 31 32
33
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
Interlock
3C4 4C4 3R4 4R4
3C5 4C5
NC NC
3C7 4C7
3C4
bypass
4C4
bypass
3C5
bypass
4C5
bypass
3C7
bypass
4C7
bypass
4C2
NC
3C2 3R2 4R2 3C8 4C8
NC NC
Interlock
3C3
bypass
4C1
bypass
3C1
bypass
4C3
bypass
4C6
bypass
3C6
bypass
4C6
NC
3C3 4C3 3C1 4C1 3R3 4R3 3C6
NC 3R1 4R1
NC
3C2
bypass
4C2
bypass
3C8
bypass
4C8
bypass
50-Pin D-Sub
Male Connector
Description Pin Description Pin Description Pin Description Pin Description Pin
3R1 49 3C2 23 3C7 13 3C4 bypass 3 Interlock 17
3R2 27 4C2 24 4C7 14 4C4 bypass 4 Interlock 33
3R3 393C3 353C8 293C5 bypass 9No connect pins:
11-12, 18, 31-32, 34,
and 45-46
3R4 5 4C3 36 4C8 30 4C5 bypass 10
4R1 50 3C4 1 3C1 bypass 21 3C6 bypass 25
4R2 28 4C4 2 4C1 bypass 22 4C6 bypass 26
4R3 40 3C5 7 3C2 bypass 43 3C7 bypass 15
4R4 6 4C5 8 4C2 bypass 44 4C7 bypass 16
3C1 37 3C6 41 3C3 bypass 19 3C8 bypass 47
4C1 38 4C6 42 4C3 bypass 20 4C8 bypass 48
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
34933T-002 (for 1-wire)
terminal block shorts these
pins for you. This safety
feature protects inadvertent
routing of high voltages
from the analog buses to the
D-sub connector of the
module.
WARNING