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Actuators and General-Purpose Switching
The 34903A Actuator provides 20 independent, isolated SPDT
(single-pole, double-throw) or Form C switches. This module offers
simple on-off switching which you can use to control power devices or
for custom switching applications. For example, you can use an actuator
to build a simple resistance ladder as shown below.
In the above diagram, the resistance is 60
Ω when all of the actuator
channels are open (not connected to
COM). Note that when the actuator
channels are open, as shown above, the normally-closed contacts
(not shown above) are connected to
COM. Values from 10Ω to 50Ω are
selected by closing the appropriate channel(s) on the module.
Actuator
10
Ω
10Ω
10Ω
10Ω
10Ω
10Ω
Resistance Out
COM
NO
COM
NO
COM
NO
COM
NO
COM
NO
NO = Normally Open
Chapter 8 Tutorial
Actuators and General-Purpose Switching
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