Datasheet

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Each cross-point in the matrix switch has two wires—a high and a low for the measurement. Or, if you
prefer, the 34933A and 34934A can be configured as a single-wire matrix, increasing the number of
channels.
The 34933A also has in-rush resistors on each column for added protection. The 34934A also has in-rush
protection resistors, but also has an automatic bypass switch for flexibility in making low-level
measurements. Row disconnect switches also reduce the capacitance loading when combining modules
to create larger matrices.
Multiple matrix modules can be combined through the analog bus or the row expansion kit (34934A only)
to create a larger matrix. The matrix can then be connected to the internal DMM for easy measurements.
Combine your matrix with a multiplexer switch to achieve the desired switching topology and get a lower-
cost solution with better specifications. All the matrix switches include a relay counter to help predict when
relays need to be replaced. Use the sequencing feature to easily change between different cross-point
setups.
NOTE: The 34933A and 34934A have 100 ohm input protection resistors to limit current and protect the
reed relays
Figure 5. 34932A dual 4x16 armature matrix
Figure 6: 34934A quad 4x32 matrix (1 of 4 matrices shown)