NI-9476 Digital Output Channel Cycles Off and OnHardware: CompactDAQ>>Digital Output Modules>>NI 9476
Problem: I have my NI-9476 (Sourcing Digital Output Module) connected to a device such as solenoids, motors, actuators, relays or lamps. When I write a true value to my digital output, the channel toggles off and on for a couple of seconds before reaching state.
Solution: Excessive current through a DO pin causes the channel to go into an overcurrent state. In an overcurrent state, the channel cycles off and on until the short circuit is removed or the current returns to an acceptably low level. Make sure the continuous output current doesn't exceed the limits listed below. Refer to the Operating Instructions And Specifications of the NI-9476.
Each channel has a status line that indicates in software whether the channel is in an overcurrent state. See the LabVIEW Help about reading the output status of the NI 9476. The maximum output current (I0) per channel depends on the exernal power supply voltage. 6–30 VDC supply voltage.............................250 mA max 30–36 VDC supply voltage.............................200 mA max To increase current drive connect any number of channels together in parallel:
Related Links: Product Manuals: NI-9476 Operating Instructions And Specifications Attachments:
Report Date: 06/23/2009 Last Updated: 12/29/2009 Document ID: 4YM9DVZT |
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