3 System Overview
100 Keysight 34970A/34972A User’s Guide
The actuator / general purpose switch
You can think of the 34903A Actuator as a control output because it is often used
to control external power devices. The actuator provides 20 independent, isolated
Form C (SPDT) switches.
Each channel can switch up to 300V DC or AC rms. Each switch can also switch
up to 1 A DC or AC rms up to 50 W maximum. For example, the maximum current
that you can switch at 120 V is 0.45 A as shown below.
For control applications, the actuator has 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 (for more information on attenuators, see the discussion on
page 324).
NO = Normally Open
NC = Normally Closed
NO
NC
COM
NO
NC
COM
Channel Open
(NC Contact Connected)
Channel Closed
(NO Contact Connected)
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