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The Agilent E4371A Powerbus Load has a + and a − power bus connector on its rear panel. There is also
a ground connection. To meet safety requirements, connect the ground terminal of the Agilent Powerbus
Load to the ground terminal of the external dc source. The load receives its operating power from the
power bus. If the dc voltage on the power bus drops below 22.8 volts, or if there is no power available on
the power bus, the load will not operate. Note that the load is not programmable. It is set at the factory
for the correct operating voltage and does not require calibration.
The On/Off switch on the load simply connects or disconnects the load from the power bus. Note that the
internal fans draw approximately 1.5 amperes of current from the power bus.
CAUTION: When discharging its maximum rated power, the Agilent E4371A Powerbus Load
becomes hot to the touch.
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POWERBUS LOAD
Figure 1-4. Agilent E4371A Powerbus Load Front and Rear Panels