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NI CF-6004 U
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ide and Specification
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© National In
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9
I/O Protection
To protect the NI CF-6004 against overvoltage, undervoltage, and overcurrent conditions as well
as ESD events, use the following guidelines:
•
If you configure a DIO line as an output, do not connect it to any external signal source,
ground signal, or power supply.
•
If you configure a DIO line as an output, understand the current requirements of the load
connected to these signals. Do not exceed the specified current output limits of the DAQ
device.
•
If you configure a DIO line as an input, do not drive the line with voltages outside of its
normal operating range. The DIO lines have a smaller operating range than the AI signals.
•
Treat the DAQ device as you would treat any static-sensitive device. Always properly
ground yourself and the equipment when handling or connecting to the DAQ device.
Power-On State
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At system startup and reset, the hardware sets all DIO lines to high-impedance inputs. The DAQ
device does not drive the signal high or low.
Static DIO
Each of the NI CF-6004 DIO lines can be used as a static DI or DO line. You can use static DIO
lines to monitor or control digital signals. All samples of static DI lines and updates of DO lines
are software-timed.
U
s
ing PFI <0..
3
> a
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a Digital AI Trigger
When an AI task is defined, you can configure any one of the PFI inputs as a digital trigger input.
When the digital trigger is enabled, the AI task waits for either a rising or falling edge on any
PFI before starting the acquisition. To use AI Start Trigger with a digital source, specify the
desired PFI input as the source and select the desired edge.
+
3
.
3
V Power So
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rce
The NI CF-6004 supplies a 3.3 V, 10 mA output. This source can be used to power external
components.
Specification
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The following specifications are typical at 25 °C, unless otherwise noted.
Analog Inp
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t
Number of channels.......................................... 4 single-ended
ADC type.......................................................... Successive approximation
ADC resolution................................................. 14 bits
DNL .................................................................. No missing codes
INL.................................................................... ±1 LSB