15 | Keysight | 34980A Multifunction Switch/Measure Unit - Data Sheet
34980A general-purpose switch modules
The 34980A general-purpose switches can be used to route signals or to control other
system devices. These switches are ideal for device actuation and switching loads or
power supplies.
NC
NO
Channel 001
(1A form C relay)
COM
Choose from the following features:
– Form C channels up to 1 A, 50 W
– Form A channels up to 5 A, 150 W
– Armature latching relays
– Simultaneous channel switching
NC
NO
Channel 028
(1A form C relay)
– Temperature sensor to detect overheating conditions
– Connections via standard 50 or 78-pin Dsub cables or detachable terminal block
COM
NO
Channel 029
(5A form A relay)
The 34937A is the most versatile general purpose switch with 28 Form C channels that
can switch up to 1 A of current. In addition, this module has four Form A channels that
can switch up to 5 A of current. For power switching applications, the 34938A has 20
5-amp channels in a Form A topology. Each Form A general-purpose switch can handle
up to 150 W, enough for many power line switching applications. For high density appli-
cations the 34939A offers 64 Form A channels for switching up to 1A and carry currents
up to 2A.
COM
NO
Channel 032
(5A form A relay)
COM
Figure 9. 34937A 32-channel Form A/
Form C switch
The general purpose switches contain latching armature relays where multiple channels
can be closed at the same time. Additionally, for switching reactive loads, the optional
terminal blocks have pads for snubbing circuits.
The built-in relay counter helps predict when relays need to be replaced.
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