Measurement Computing USB-1096HFS - Manual (Page 19)

USB-1096HFS User's Guide Functional Details
Power limitations using multiple USB-1096HFS devices
When daisy chaining additional MCC USB Series products to the USB-1096HFS, you must ensure that you
provide adequate power to each board that you connect. The USB-1096HFS is powered with a 9 VDC nominal,
3.0 A external power supply.
Supply current
Running one USB-1096HFS at full load draws 2.6 A from the 3A supply. When using the USB-1096HFS under
full load conditions, you cannot daisy chain additional MCC USB Series products unless you supply external
power to each board in the chain.
If you are not sure how much current your application requires, we recommend that you provide separate power
to each MCC USB Series product that you connect.
Voltage drop
A drop in voltage occurs with each board connected in a daisy chain system. The voltage drop between the
input of one MCC USB Series product and the output of the board it is connected to is 0.5 V maximum. Factor
in this voltage drop when you configure a daisy chain system to ensure that adequate power is provided to the
last board in the chain. Always provide a separate power supply when the USB-1096HFS is the last board in the
chain.
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