13 | Keysight | 34980A Multifunction Switch/Measure Unit - Data Sheet
34980A matrix switch modules
The 34980A matrix modules are full crosspoint matrices
that allow you to connect any row to any column. This is a
convenient way to connect multiple test instruments to
multiple points on a device under test.
Choose from the following features:
– Latching armature relays—300 V, 1 A
– High-speed reed relays—150 V, 0.5 A
– Conꢁgurable dual 4x8, dual 4x16 or quad 4x32 modules
– Single-wire conꢁguration (34933A or 34934A)
– High density matrix with automatic surge protection and
row disconnect for ꢀexible measurements (34934A)
– Analog bus expandable rows to create larger matrices
(34931A, 32A, 33A)
Figure 7. 34932A dual 4x16 armature matrix
– Connections via standard 50 or 78-pin Dsub cables or
detachable terminal block
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 conꢁgured 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 ꢀexibility in making
low-level measurements. Row disconnect switches also reduce
the capacitance loading when combining modules to create
larger matricies.
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.
Figure 8. 34934A quad 4x32 matrix (1 of 4 matricies shown)
Combine your matrix with a multiplexer switch to achieve the
desired switching topology and get a lower-cost solution with
better speciꢁcations. 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
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