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120 L4400 User’s Guide
5 L4433A Dual/Quad 4x8 Reed Matrix
L4433A Simplified Schematic for Two-Wire Mode
Row 8
Row 7
Row 6
C2L
C2L
bypass
L
C8L
bypass
L
C8L
C2H
C2H
bypass
H
H
L
L
L
L
H
H
H
C1H
C1H
bypass
H
C1L
C1L
bypass
L
C8H
C8H
bypass
H
C1L
C1L
bypass
L
C8H
C8H
bypass
H
C2L
C2L
bypass
L
C8L
bypass
L
C8L
H
L
L
L
L
H
H
H
C1H
C1H
bypass
H
C2H
C2H
bypass
H
H
H
L
L
Matrix 1
Matrix 2
Col 1H Col 1L Col 2H Col 2L Col 8H Col 8L
Col 1H Col 1L Col 2H Col 2L Col 8H Col 8L
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
Row 8
ABus1
DMM
(MEAS)
ABus2
DMM
(SENS)
ABus3
ABus4
922
923
924
921
H
H
H
H
L
L
L
L
Analog Buses
NOTE: Three-digit channel numbers are derived from the intersection of the
rows and columns, columns having two digits. The intersection shown here
represents Channel 308 (Row 3, Column 8).
NOTE: Although columns are
numbered the same on Matrix
1 and Matrix 2, they are
electrically separate from one
another.
NOTE: All series resistors
shown are 100
Ω.
NOTE:
Matrix Relays: Reed non-latching
Analog Bus relays: Armature
non-latching