National Instruments NI 9476 - Manual (Page 9)

© National Instruments Corp. 9 NI 9476 Operating Instructions and Specifications
Increasing Current Drive
Each channel has a continuous output current of 250 mA. If you
want to increase the output current to a device, you can connect
any number of channels together in parallel. For example, if you
want to drive 1 A of current, connect DO<0..3> in parallel as
shown in Figure 3. You must turn all parallel channels on and off
simultaneously so that the current on any single channel cannot
exceed the 250 mA rating.
Figure 3. Increasing the Current to a Device Connected to the NI 9476
NI 9476
250 mA
250 mA
250 mA
250 mA
DO3
DO1
DO0
DO2
1 A
+
_
Device
COM
External
Power
Supply
V
sup