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National Instruments Corp.
15
NI 9237E Operating Instructions and Specifications
The 150 mW limit allows you to power half and full bridges as
follows:
•
Four 350
half bridges at 5.0 V
•
Four 350
full bridges at 3.3 V
•
Four 120
half bridges at 2.5 V
If you need an excitation voltage that causes more than 150 mW to
dissipate across all the bridges, connect an external excitation
voltage source to the NI 9237E. For the NI 9237E with DSUB, use
the two V
ex
pins to connect the external excitation source. For the
NI 9237E with RJ-50, use the two EX+ and EX– terminals on the
four-terminal external excitation voltage connector to connect one
external excitation source. You can use the additional EX+ and
EX– terminals on the connector to wire multiple NI 9237E
modules together in a daisy chain.
