National Instruments PXI TB-2705 Bedienungsanleitung

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INSTALLATION GUIDE

TB-2705 PXI TERMINAL BLOCK FOR ES

ERIES

AND WAVEFORM GENERATION DEVICES

This installation guide describes how to install and connect signals to

the TB-2705 terminal block for use with PXI E Series and waveform

generation devices.

Introduction

The TB-2705 is a terminal block assembly consisting of a printed circuit

board, 62 screw terminals, and a plastic enclosure with a strain relief. The

terminal block assembly connects directly to the front panel of National

Instruments E Series and waveform generation devices, eliminating the

need for an external cable.

The TB-2705 allows you to easily connect analog input, analog output,

counter-timer, and digital I/O signals to your National Instruments device.

The 62 screw terminals allow access to every pin on the device with the

exception of some digital ground signals that are common to one another.

The TB-2705 also has a shielded strain-relief to secure your I/O wires and

provide an adequate chassis-ground connection.

What You Need to Get Started

You need the following to set up and use your terminal block:

❑TB-2705 Terminal Block Assembly

❑TB-2705 PXI TerminalBlock for E Series and Waveform Generation

Devices Installation Guide

❑One of the following:

– PXI E Series device

– waveform generation device with a 68-pin I/O connector

™

TB-2705 PXI Terminal Block 2 ni.com

❑One of the following:

– PXI E Series User Manual

–waveform generation device user manual

❑0.10 in. slotted screwdriver

❑Number 1 Phillips-head screwdriver

❑Wire cutters

❑Wire insulation stripper

❑One of the following:

–E Series device overlay

–Waveform generation device overlay

Conventions

The following conventions are used in this guide:

<> Angle brackets that contain numbers separated by an ellipsis represent a

range of values associated with a bit or signal name—for example,

DBIO<3..0>.

This icon denotes a note, which alerts you to important information.

This icon denotes a caution, which advises you of precautions to take to

avoid injury, data loss, or a system crash.

italic Italic text denotes variables, emphasis, a cross reference, or an introduction

to a key concept. This font also denotes text that is a placeholder for a word

or value that you must supply.

Safety Information

Cautions Do not operate the device in an explosive atmosphere or where there may be

flammable gases or fumes.

Do not operate damaged equipment. The safety protection features built into this device

can become impaired if the device becomes damaged in any way. If the device is damaged,

turn the device off and do not use it until service-trained personnel can check its safety.

If necessary, return the device to National Instruments for service and repair to ensure that

its safety is not compromised.

©National Instruments Corporation 3 TB-2705 PXI Terminal Block

Do not operate this equipment in a manner that contradicts the information specified in this

document. Misuse of this equipment could result in a shock hazard.

Do not substitute parts or modify equipment. Because of the danger of introducing

additional hazards, do not install unauthorized parts or modify the device. Return the

device to National Instruments for service and repair to ensure that its safety features

are not compromised.

You must insulate all of your signal connections to the highest voltage with which the

TB-2705 can come in contact.

Connections, including power signals to ground and vice versa, that exceed any of the

maximum signal ratings on the terminal block can create a shock or fire hazard, or can

damage any or all of the boards connected to the host computer, and the terminal block.

National Instruments is not liable for any damages or injuries resulting from incorrect

signal connections.

Clean the module and accessories by brushing off light dust with a soft non-metallic brush.

Remove other contaminants with a stiff non-metallic brush. The unit must be completely

dry and free from contaminants before returning it to service.

Signal Descriptions

Table 1 describes the E Series signals available on the TB-2705. Table 2

describes the waveform generation signals.

Table 1. TB-2705 Terminal Block E Series Signal Descriptions

Signal Name Reference Direction Description

AIGND — — Analog Input Ground—These

terminals are the reference point for

single-ended measurements in RSE

configuration and the bias current

return point for differential

measurements. All three ground

references—AIGND, AOGND, and

DGND—are connected together on

your E Series device.

ACH<0..15> AIGND Input Analog Input Channels 0 through

15—You can configure each channel

pair, ACH<i, i+8> (i = 0..7), as either

one differential input or two

single-ended inputs.

TB-2705 PXI Terminal Block 4 ni.com

AISENSE AIGND Input Analog Input Sense—This terminal

serves as the reference node for any

of channels ACH <0..15> in NRSE

configuration.

DAC0OUT AOGND Output Analog Channel 0 Output—This

terminal supplies the voltage output

of analog output channel 0.

DAC1OUT AOGND Output Analog Channel 1 Output—This

terminal supplies the voltage output

of analog output channel 1.

EXTREF AOGND Input External Reference—This terminal

is the external reference input for the

analog output circuitry.

AOGND — — Analog Output Ground—The analog

output voltages are referenced to these

terminals. All three ground

references—AIGND, AOGND, and

DGND—are connected together on

your E Series device.

DGND — — Digital Ground—These pins supply

the reference for the digital signals at

the I/O connector as well as the

+5 VDC supply. All three ground

references—AIGND, AOGND, and

DGND—are connected together on

your E Series device.

DIO<0..7> DGND Input or

Output

Digital I/O Signals—DIO 6 and 7

can control the up/down signal of

general-purpose counters 0 and 1,

respectively.

+5 V DGND Output +5 VDC Source—These terminals are

fused for up to 1 A of +5 V supply.

The fuse is self-resetting.

Table 1. TB-2705 Terminal Block E Series Signal Descriptions (Continued)

Signal Name Reference Direction Description

©National Instruments Corporation 5 TB-2705 PXI Terminal Block

SCANCLK DGND Output Scan Clock—This terminal pulses

once for each A/D conversion in the

scanning modes when enabled. The

low-to-high edge indicates when you

can remove the input signal from the

input or switched to another signal.

EXTSTROBE DGND Output External Strobe—This output is used

for controlling SCXI modules.

PFI0/TRIG1 DGND Input PFI0/Trigger 1—As an input, this

is either one of the programmable

function inputs (PFIs) or the source for

the hardware analog trigger. For more

information on PFI signals, see the

PXI E Series User Manual.

Output As an output, this is the TRIG1 signal.

In posttrigger data acquisition

sequences, a low-to-high transition

indicates the initiation of the

acquisition sequence. In pretrigger

applications, a low-to-high transition

indicates the initiation of the pretrigger

conversions.

PFI1/TRIG2 DGND Input PFI1/Trigger 2—As an input, this is

one of the PFIs.

Output As an output, this is the TRIG2 signal.

In pretrigger applications, a

low-to-high transition indicates the

initiation of the posttrigger

conversions. TRIG2 is not used in

posttrigger applications.

PFI2/CONVERT DGND Input PFI2/Convert—As an input, this is one

of the PFIs.

Output As an output, this is the CONVERT*

signal. A high-to-low edge on

CONVERT* indicates the start of an

A/D conversion.

Table 1. TB-2705 Terminal Block E Series Signal Descriptions (Continued)

Signal Name Reference Direction Description

TB-2705 PXI Terminal Block 6 ni.com

PFI3/GPCTR1_

SOURCE

DGND Input PFI3/Counter 1 Source—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR1_SOURCE signal. This

signal reflects the actual source

connected to general-purpose

counter 1.

PFI4/GPCTR1_GATE DGND Input PFI4/Counter 1 Gate—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR1_GATE signal. This signal

reflects the actual gate signal

connected to the general-purpose

counter 1.

GPCTR1_OUT DGND Output Counter 1 Output—This is the

general-purpose counter 1 output.

PFI5/UPDATE DGND Input PFI5/Update—As an input, this is one

of the PFIs.

Output As an output, this is the UPDATE*

signal. A high-to-low edge on

UPDATE* indicates that the analog

output primary group is updating.

PFI6/WFTRIG DGND Input PFI6/Waveform Trigger—As an input,

this is one of the PFIs.

Output As an output, this is the WFTRIG

signal. In timed analog output

sequences, a low-to-high transition

indicates the initiation of the

waveform generation.

PFI7/STARTSCAN DGND Input PFI7/Start of Scan—As an input, this

is one of the PFIs.

Output As an output, this is the STARTSCAN

signal. This pin pulses once at the start

of each analog input scan in the

interval scan. A low-to-high transition

indicates the start of the scan.

Table 1. TB-2705 Terminal Block E Series Signal Descriptions (Continued)

Signal Name Reference Direction Description

©National Instruments Corporation 7 TB-2705 PXI Terminal Block

PFI8/GPCTR0_

SOURCE

DGND Input PFI8/Counter 0 Source—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR0_SOURCE signal. This

signal reflects the actual source

connected to the general-purpose

counter 0.

PFI9/GPCTR0_GATE DGND Input PFI9/Counter 0 Gate—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR0_GATE signal. This signal

reflects the actual gate signal

connected to the general-purpose

counter 0.

GPCTR0_OUT DGND Output Counter 0 Output—This is the

general-purpose counter 0 output.

FREQ_OUT DGND Output Frequency Output—This output is

from the frequency generator output.

Table 2. TB-2705 Terminal Block Waveform Generation Signal Descriptions

Signal Name Reference Direction Description

AOGND — — Analog Output Ground—The analog

output voltages are referenced to this

node.

DAC<0..7>OUT AOGND Output Analog Output Channels 0

through 7—These pins supply the

voltage output of the respective

channel.

DGND — — Digital Ground—This pin supplies the

reference for the digital signals at the

I/O connector as well as the reference

for the +5 VDC supply.

DIO<0..7> DGND Input or

Output

Digital I/O Signals—DIO6 and 7 can

control the up/down signal of

general-purpose counters 0 and 1,

respectively.

Table 1. TB-2705 Terminal Block E Series Signal Descriptions (Continued)

Signal Name Reference Direction Description

TB-2705 PXI Terminal Block 8 ni.com

+5 V DGND Output +5 VDC Source—These pins are fused

for up to 1 A of +5 V supply. The fuse

is self-resetting.

EXTREF AOGND Input External Reference—This is the

external reference input for the analog

output circuitry.

EXTSTROBE* DGND Output External Strobe—This output is used

for controlling SCXI modules.

PFI0 DGND Input PFI0—As an input, this is one of the

Programmable Function Inputs (PFIs).

For more information on PFI signals,

see the 6711/6713/6715 User Manual.

You cannot use PFI0 as an output.

PFI1 DGND Input PFI1—As an input, this is one of the

PFIs. You cannot use PFI1 as an

output.

PFI2 DGND Input PFI2—As an input, this is one of the

PFIs. You cannot use PFI2 as an

output.

PFI3/GPCTR1_SOURCE DGND Input PFI3/Counter 1 Source—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR1_SOURCE signal. This

signal reflects the actual source

connected to the general-purpose

counter 1.

PFI4/GPCTR1_GATE DGND Input PFI4/Counter 1 Gate—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR1_GATE signal. This signal

reflects the actual gate signal

connected to the general-purpose

counter 1.

GPCTR1_OUT DGND Output Counter 1 Output—This is the

general-purpose counter 1 output.

Table 2. TB-2705 Terminal Block Waveform Generation Signal Descriptions (Continued)

Signal Name Reference Direction Description

©National Instruments Corporation 9 TB-2705 PXI Terminal Block

PFI5/UPDATE* DGND Input PFI5/Update—As an input, this is one

of the PFIs.

Output As an output, this is the UPDATE*

signal. A high-to-low edge on

UPDATE* indicates that the analog

output waveform generation group is

being updated.

PFI6/WFTRIG DGND Input PFI6/Waveform Trigger—As an input,

this is one of the PFIs.

Output As an output, this is the WFTRIG

signal. In timed analog output

sequences, a low-to-high transition

indicates the initiation of the waveform

generation.

PFI7 DGND Input PFI7—As an input, this is one of the

PFIs. You cannot use PFI7 as an

output.

PFI8/GPCTR0_SOURCE DGND Input PFI8/Counter 0 Source—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR0_SOURCE signal. This

signal reflects the actual source

connected to the general-purpose

counter 0.

PFI9/GPCTR0_GATE DGND Input PFI9/Counter 0 Gate—As an input,

this is one of the PFIs.

Output As an output, this is the

GPCTR0_GATE signal. This signal

reflects the actual gate signal

connected to the general-purpose

counter 0.

GPCTR0_OUT DGND Output Counter 0 Output—This is the

general-purpose counter 0 output.

FREQ_OUT DGND Output Frequency Output—This is the

frequency generator output.

Table 2. TB-2705 Terminal Block Waveform Generation Signal Descriptions (Continued)

Signal Name Reference Direction Description

TB-2705 PXI Terminal Block 10 ni.com

Connecting the Signals

See your PXI E Series User Manual or waveform generation device user

manual for examples of how to connect your signals. Refer to Figure 1 as

you perform the following steps to connect signals to your terminal block.

Figure 1. TB-2705 Parts Locator Diagram

1Cover

2 Cover Screws (Captive)

3 Strain-Relief Bar

4 Chassis Connection Screws

5 Ground Lug Screw

6 Ground Lug

7 Chassis Ground Tab

8 Connection to PXI Module

9 Strain-Relief Screws

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