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104 34980A User’s Guide
4 Low Frequency Multiplexer Switch Modules
34921A Simplified Schematic
This drawing shows two independent 20- channel 2-wire MUXes.
026
027
028
029
030
ABus2
DMM
(SENS)
ABus3
931
923
913 914
924
922
912911
921
L
001
002
003
004
005
H
L
006
007
008
009
010
H
L
011
012
013
014
015
L
H
016
017
018
019
020
021
022
023
024
025
H
L
031
032
033
034
035
036
037
038
039
040
L
H
L
H
L
042
043
I
041
LH
LH
LH
LH
LH
LHLH
LH
H
L
I
L
I
L
I
L
I
L
044
LH
H
LH
ABus1
DMM
(MEAS)
Current
Fuse
Fuse
Fuse
Fuse
ABus4
Bank 2
COM 1
NOTE: The three-digit number
assigned to each switch represents
the channel number.
Current
COM 2
Analog Buses
Bank 1
NOTE:
Bank relays: Armature latching
Analog Bus relays: Armature non-latching