National Instruments PXI TB-2705 User manual

PXI™, National Instruments™, and ni.com™are trademarks of National Instruments Corporation. Product and company names mentioned herein are
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322909A-01 ©Copyright 2000 National Instruments Corp. All rights reserved. November 2000
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
™

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❑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.

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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

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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

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+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

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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
1
2
8
4
4
9
7
6
5
3