09 | Keysight | 34980A Multifunction Switch/Measure Unit - Data Sheet
34980A multiplexer switch modules
The 34980A multiplexer modules can be used to connect one of many different points to
a single point. You can connect to an external instrument, or scan multiple analog signals
to the internal DMM.
Choose from the following features:
– 1-wire, 2-wire, or 4-wire conꢁgurations
– High voltage—up to 300 V, 1 A
– High density—70 2-wire or 80 1-wire channels
– Scan up to 1000ch/sec with the 34925A
– Bandwidths up to 45 MHz
– Temperature measurements with built-in thermocouple reference junction (34921T)
– AC or DC current measurements without external shunts
– Flexible connections via standard 50- or 78- pin Dsub cables or detachable terminal
blocks
Figure 4. 34921A 40-channel armature multiplexer with low thermal offset (bank 2)
Table 2. Multiplexer measurement functions
Voltage
AC/DC
Current
AC/DC
Freq/
Period
Thermo-
couple
RTD
2-Wire
RTD
4-Wire
Ω 2-Wire Ω 4-Wire
Thermistor
Yes
34921A Armature Multiplexer
34922A Armature Multiplexer
34923A Reed Multiplexer (2-wire)
34923A Reed Multiplexer (1-wire)
34924A Reed Multiplexer
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
es
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
34925A FET Multiplexer (2-wire)
34925A FET Multiplexer (1-wire)
No
No
No
No
NOTE: See User’s Guide for additional information.
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