Troubleshooting and Diagnostics 4
Keysight 34980A Service Guide 85
*The current switches use two relays to create a “make-before-break” circuit. You should replace both relays.
34922A 70-Channel Armature Multiplexer
The high-density 34922A 70-Channel Armature Multiplexer (70-Ch Arm MUX) is
divided into two banks with 35 latching armature switches (channels 1-35 and
36-70) in each. This module also contains eight armature Analog Bus relays
(channels 911-914 and 921-924), four on each bank that can connect the bank
relays to the system Analog Buses. Through ABus1 and ABus2 you can connect
any of the channels to the internal DMM for voltage or resistance measurements.
Refer to the simplified schematic below.
Backplane Backplane
911 K911 921 K921
912 K912 922 K922
913 K913 923 K923
914 K914 924 K924
Current* Current*
041 K841, K841S, F1041 043 K843, K843S, F1043
042 K842, K842S, F1042 044 K844, K844S, F1044
Current Backplane
931 K931
Bank 1 Bank 2
To Next Page
Loading...
Need help?
General
