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PCI-1200 National Instruments

PCI-1200 National Instruments Analog Output Signal Connections

Brand： National Instruments Model number：PCI-1200

Colour：new Warranty: 12 months

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PCI-1200 National Instruments Processor module

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Additional Information:

Figure 3-6 shows how to connect a grounded signal source to an

NI PCI-1200 configured in NRSE input mode. Configuration instructions

are included in the Analog I/O Configuration section of Chapter 2,

Installing and Configuring the NI PCI-1200.

PCI-1200 National Instruments

The 100 kΩ resistors shown in Figure 3-4 create a return path to ground for

the bias currents of the instrumentation amplifier. If there is no return path,

the instrumentation amplifier bias currents charge stray capacitances,

resulting in uncontrollable drift and possible saturation in the amplifier.

Typically, values from 10 to 100 kΩ are used.

A resistor from each input to ground, as shown in Figure 3-4, provides bias

current return paths for an AC-coupled input signal.

If the input signal is DC-coupled, you need only the resistor that connects

the negative signal input to ground. This connection does not lower the

input impedance of the AI channel.

Single-Ended Connection Considerations

Single-ended connections are those in which all NI PCI-1200 AI signals are

referenced to one common ground. The input signals are tied to the positive

input of the instrumentation amplifier, and the common ground point is tied

to the negative input of the instrumentation amplifier.

When the NI PCI-1200 is configured for a single-ended input mode

(NRSE or RSE), eight AI channels are available. Use single-ended input

connections when the following conditions are met by all input signals:

• Input signals are high level (greater than 1 V).

• Leads connecting the signals to the NI PCI-1200 are less than 10 ft.

• All input signals share a common reference signal (at the source).

If any of the preceding criteria is not met, use the DIFF input configuration.

You can software configure the NI PCI-1200 for two types of single-ended

connections, RSE configuration and NRSE configuration. Use the RSE

configuration for floating signal sources; in this case, the NI PCI-1200

provides the reference ground point for the external signal. Use the NRSE

configuration for ground-referenced signal sources; in this case, the

external signal supplies its own reference ground point and the

NI PCI-1200 should not supply one.

NI	PXIe-5622	NI	PXI-2557	NI	PXI-2540
NI	PXI-2584	NI	PXI-2558	NI	PXI-2541
NI	NI 5792	NI	PXIe-2593	NI	PXIe-2540
NI	NI 5792R	NI	PXIe-2529	NI	PXI-2522
NI	PXI-2585	NI	PXIe-2575	NI	PXI-2523
NI	NI 5793	NI	PXIe-2569	NI	PXI-2521
NI	NI 5793R	NI	PXI-2546	NI	PCI-5421
NI	PXI-6542	NI	PXI-2548	NI	PCI-5412
NI	PXI-2586	NI	PXI-2559	NI	PCI-5406
NI	PXI-5153	NI	PXIe-2527	NI	PCI-5402
NI	NI 5782	NI	PXI-2510	NI	PXIe-6612
NI	PXI-2593	NI	PXI-2514	NI	PXIe-6614
NI	PXI-5660	NI	PXI-2515	NI	PXI-6602
NI	PXI-6541	NI	PXIe-2515	NI	PXI-6624
NI	PXI-2594	NI	PXIe-2512	NI	PXI-4461
NI	PXI-2595	NI	PXIe-2514	NI	PXI-4462
NI	PXI-2596	NI	PXI-2512	NI	PXI-6608
NI	NI 5752	NI	PXI-2531	NI	PXIe-4610
NI	PXI-2597	NI	PXIe-2531	NI	PXIe-6366
NI	PXI-2598	NI	PXI-2530B	NI	PXIe-6368
NI	NI 5761	NI	PXI-2571	NI	SCXI-1125
NI	PXI-2599	NI	PXI-2543	NI	NI 9234
NI	NI 5751	NI	PXI-2720	NI	9067
NI	NI 5731	NI	PXI-2722	NI	9205
NI	NI 5732	NI	PXIe-2725	NI	9237
NI	NI 5733	NI	PXIe-2727	NI	9477
NI	NI 5734	NI	PXIe-2790	NI	9923
NI	NI 5762	NI	PXI-2797	NI	196762-01

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