Introduction to the 34980A
1
Keysight 34980A Mainframe User’s Guide
35
The Actuator / General-Purpose Switches
You can think of the 34937A, 34938A, and 34939A modules as a control outputs
because they are often used to control external power devices. For example, the
34937A provides 28 independent, isolated Form C (SPDT) switches. Each channel
can switch up to 300V dc or ac rms. Each switch can also switch up to 1A dc or ac
rms up to 60W maximum. For example, the maximum current that you can switch
at 120V is 0.45A as shown below.
For control applications, the GP modules have the following advantages:
– Higher voltage and power rating than the digital output channels.
– The actuator switches can also be used to control power devices.
When used with high-power devices, however, it is critical that you provide
protection to the switch from capacitive and inductive loads to ensure maximum
relay life.
300
50
100
120
30
.2
.5
1
