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Low Frequency Multiplexer Modules
34923A Simplified Schematic for Two- or Four-Wire Mode
This drawing shows two independent 20-channel 2-wire MUXes.
To change configuration modes, use the SYSTem:MODule:WIRE:MODE
command.
COM 1
H
L
100
100
100
100
100
100
H
L
COM 2
Keysight 34921A-34925A Low Frequency Multiplexer Modules User's Guide
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The three-digit number assigned to each switch represents the
channel number.
Bank Relays: Reed non-latching; Analog Bus Relays: Armature
non-latching
H
001
006
L
002
007
003
008
004
009
005
010
H
L
100
100
100
911
H
L
Analog Buses
ABus1
DMM
(MEAS)
H
L
921
100
100
100
H
L
021
026
022
027
023
028
024
029
H
025
030
L
Bank 1
H
H
011
L
012
013
014
015
H
L
H
912
913
H
L
H
L
ABus2
DMM
ABus3
(SENS)
H
L
H
L
922
923
H
L
H
031
032
033
034
H
H
035
L
Bank 2
H
016
L
L
017
018
019
020
L
L
H
914
H
L
ABus4
H
L
924
L
H
L
036
037
038
039
H
040
L
L
31
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