5-46 E6198B Switch/Load Unit User Manual
5 Using Load Cards and Loads
Using the Agilent U7177A 24-Channel Load Card
The Agilent U7177A 24-channel medium-current load card is
intended to be used with loads mounted external to the
Switch/Load Unit. Figure 5-33 shows a block diagram of the
U7177A.
• The card is one slot wide. See “Card Location
Recommendations".
• The card type is 18
h
. See “Load Card Type and Configuration
ID".
• The factory default configuration is explained in “Selecting a
Power Supply Configuration".
• The factory default is to load a 0.05 Ω, 0.1% sense resistor in
each channel. See “Selecting a Current-Sense Resistor Value".
• 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 a special external power supply while
bypassing the power bus of the SLU, for example. See “Using
the Power Switches as General Purpose Relays".
• Each channel is capable of up to 2 A continuous carry
current.
• The card is equipped for current sensing
• There is no any flyback voltage protection
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