5-76 E6198B Switch/Load Unit User Manual
5 Using Load Cards and Loads
Using the Agilent N9378A 24-Channel Low Resistance Load Card
The Agilent N9378A 24-channel high-density load card is
designed to work with loads mounted on mezzanine cards
inside the Switch/Load Unit with up to eight quadruple loads
per card. Figure 5-53 shows a block diagram of the Agilent
N9378A.
• The card is one slot wide. “Card Location Recommendations"
• The card type is 05
h
. “Load Card Type and Configuration ID"
• The factory default configuration is explained in “Selecting a
Power Supply Configuration".
• The Common line (PwrX where X is the channel number) on
the input is brought back out to the input, allowing each
channel to operate in a general-purpose (GP) configuration.
This lets you switch in an external power supply while
bypassing the power bus of the SLU, for example. “Using the
Power Switches as General Purpose Relays"
• The card is not equipped for current sensing.
• The card does not provide flyback voltage protection.
• Loads are mounted onboard on a series of mezzanine cards
that plug into the load card. You can attach as many as four
loads per channel. “Connecting Loads"
• Each channel is capable of up to 2A continuous carry into a
resistive load.
It is possible to close more than one channel at a time. The power
supply connections to the load card and individual channels are
rated for a maximum of 2 A continuous. Do not exceed these
specifications.
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