Keysight 34921A - 34921 A Simplified Schematic

Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide 17
Low Frequency Multiplexer Modules
34921A Simplified Schematic
This drawing shows two independent 20-channel 2-wire MUXes.
The three-digit number assigned to each switch represents the
channel number.
Bank Relays: Armature latching; Analog Bus Relays: Armature
non-latching
026
027
028
029
030
ABus2
DMM
(SENS)
ABus3
ABus4
931
923
913 914
924
922
912911
921
DMM
(MEAS)
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
Current
Fuse
Fuse
Fuse
Fuse
042
043
041
LH
LH
LH
LH
LH
LHLH
LH
H
L
L
L
L
L
044
LH
H
LH
COM 2
Bank 2
Current
Bank 1
COM 1
Analog Buses
I
I
I
I
I
ABus1
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