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General Purpose Switch Modules
This User's Guide covers the following two plug-in modules for the Keysight
34980A Multifunction Switch/Measure Unit:
34937A
34938A
34939A
– The 34937A provides independent control of 32 relays, including:
– The 34938A, for power switching applications, offers 20 Form A relays, each
– The 34939A provides independent control of 64 Form-A relays, each rated for
All three modules utilize armature-latching relays.
You can use these general-purpose switches in your 34980A mainframe for device
actuation, digital output, signal routing, or — combined with other switch modules —
to create flexible switching topologies. You can close multiple channels at the
same time. These modules do not connect to the 34980A's analog buses.
High Energy Sources: The instruments are designed to handle inputs up to
WARNING
their rated currents or their rated powers, whichever is less. Under certain
fault conditions, high energy sources could provide substantially more
current or power than the instrument can handle. It is important to provide
external current limiting, such as fuses if the inputs are connected to
high-energy sources. The overcurrent protection is to be rated for the
maximum available short circuit current of the hazardous sources. Ensure
that the current limiting devices / snubber circuits are appropriate for the
signal being tested. Failure to do so may result in hazardous conditions such
as fire or shock and could lead to personal injury or death. Refer to
Current Limiting Graphs
Keysight 34937A-34939A User's Guide
28-channel Form C and 4-channel Form A
28-channel 5-amp Form A
64-Channel High-Density Form A
– Twenty-eight Form C relays, each rated for 1 A at 60 VA per channel
– Four Form A (SPST) relays, each rated for 5 A at 150 VA per channel.
rated for 5 A at 150 VA per channel.
1 A at 60 VA per channel.
for the current limiting graphs of 34890A.
34980A
15
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