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L4433A Dual/Quad 4x8 Reed Matrix 5
L4400 User’s Guide 121
L4433A D-Sub Connectors for Two-Wire Mode
Matrix 1
Matrix 2
For orientation, the D-sub connector
end of the module is facing you.
Matrix 1
Matrix 2
NOTE:
• In this diagram and the
table below, R represents
“row,” and C represents
“column.”
• Bypass” means to
bypass 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
NC
C4H C4L R4H R4L
C5H C5L
NC NC
C7H C7L
C4H
bypass
C4L
bypass
C5H
bypass
C5L
bypass
C7H
bypass
C7L
bypass
C2L
NC
C2H R2H R2L C8H C8L
NC NC
GND
C3H
bypass
C1L
bypass
C1H
bypass
C3L
bypass
C6L
bypass
C6H
bypass
C6L
NC
C3H C3L C1H C1L R3H R3L C6H
NC R1H R1LNC
C2H
bypass
C2L
bypass
C8H
bypass
C8L
bypass
50-Pin D-Sub Male Connector
Description Pin Description Pin Description Pin Description Pin Description Pin Description Pin
R1H 49 C1H 37 C5H 7 C1H bypass 21 C5H bypass 9 GND 33
R1L 50 C1L 38 C5L 8 C1L bypass 22 C5L bypass 10 No Connect pins:
11-12, 17-18, 31-32,
34, and 45-46
R2H 27 C2H 23 C6H 41 C2H bypass 43 C6H bypass 25
R2L 28 C2L 24 C6L 42 C2L bypass 44 C6L bypass 26
R3H 39 C3H 35 C7H 13 C3H bypass 19 C7H bypass 15
R3L 40 C3L 36 C7L 14 C3L bypass 20 C7L bypass 16
R4H 5 C4H 1 C8H 29 C4H bypass 3 C8H bypass 47
R4L 6 C4L 2 C8L 30 C4L bypass 4 C8L bypass 48
NOTE:
• In this diagram and the
table below, R represents
“row,” and C represents
“column.”
• “Bypass” means to
bypass the 100Ω in-rush
resistor that protects the
reed relays.
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32 33
C2L
NC
C2H R6H R6L C8H C8L
NC NC
Interlock
C3H
bypass
C1L
bypass
C1H
bypass
C3L
bypass
C6L
bypass
C6H
bypass
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Interlock
C4H C4L R8H R8L
C5H C5L
NC NC
C7H C7L
C4H
bypass
C4L
bypass
C5H
bypass
C5L
bypass
C7H
bypass
C7L
bypass
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
C6L
NC
C3H C3L C1H C1L R7H R7L C6H
NC R5H R5LNC
C2H
bypass
C2L
bypass
C8H
bypass
C8L
bypass
50-Pin D-Sub Male Connector
Description Pin Description Pin Description Pin Description Pin Description Pin
R5H 49 C2H 23 C7H 13 C4H bypass 3 Interlock 17
R5L 50 C2L 24 C7L 14 C4L bypass 4 Interlock 33
R6H27C3H35C8H29C5H bypass9No Connect pins:
11-12, 18, 31-32, 34,
and 45-46
R6L 28 C3L 36 C8L 30 C5L bypass 10
R7H 39 C4H 1 C1H bypass 21 C6H bypass 25
R7L 40 C4L 2 C1L bypass 22 C6L bypass 26
R8H 5 C5H 7 C2H bypass 43 C7H bypass 15
R8L 6 C5L 8 C2L bypass 44 C7L bypass 16
C1H 37 C6H 41 C3H bypass 19 C8H bypass 47
C1L 38 C6L 42 C3L bypass 20 C8L 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-001 (for 2-wire)
terminal block shorts these
pins for you. This feature
protects inadvertent routing
of high voltages from the
analog bus to the D-sub
connector of the module.
WARNING