Keysight 34921A - 34924 A D-Sub Connector Pinouts

42 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide
Low Frequency Multiplexer Modules 34924A 70-Channel Reed Multiplexer
34924A Simplified Schematic
This drawing shows two independent 35-channel 2-wire MUXes.
The three-digit number assigned to each switch represents the
channel number.
Bank relays: Reed non-latching; Analog Bus relays: Armature
non-latching
ABus2
DMM
(SENS)
ABus3 ABus4
ABus1
DMM
(MEAS)
911 914912 913
924922 923921
LH
LH
001
002
003
004
005
H
L
006
H
015
016
017
018
019
L
020
021
022
023
024
025
026
H
L
027
028
029
030
031
032
033
H
L
034
008
009
010
011
012
H
L
013
007
035
014
H
L
036
037
038
039
040
041
042
H
L
043
044
045
046
047
048
049
H
L
050
051
052
053
054
055
056
063
H
L
064
065
066
067
068
069
070
057
058
059
060
061
062
H
L
LH
LH
LH
LH
LH
LHLH
LH
100
100
100
100
100 100
100
100
100
100 100
100
Bank 1
Bank 2
COM 2
COM 1
Analog Buses
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