Keysight 34922A - 34921 A Schematics and Connectors

Keysight 34921A-34925A User’s Guide 27
34921A Simplified Schematic
This drawing shows two independent 20-channel 2-wire MUXes.
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
0
42
0
43
0
41
LH
LH
LH
LH
LH
LHLH
LH
H
L
L
L
L
L
0
44
LH
H
LH
COM 2
Bank 2
Current
Bank 1
COM 1
Analog Buses
I
I
I
I
I
ABus1
NOTE: The three-digit number assigned to each switch represents the channel number.
NOTE:
Bank Relays: Armature latching
Analog Bus Relays: Armature
non-latching