National Instruments BNC-2110 Manual de usuario

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321860B-01

INSTALLATION GUIDE

BNC-2110 DESKTOP AND DIN RAIL-MOUNTABLE

BNC ADAPTER

This installation guide describes how to install and configure your

BNC-2110 accessory.

Introduction

The BNC-2110 is a desktop and DIN rail-mountable BNC adapter you

can connect directly to data acquisition (DAQ) devices. The BNC-2110

includes 15 BNC connectors and a digital screw terminal with 30 pins.

The BNC-2110 has a 68-pin I/O connector that connects to the PCI-60XXE

and PCI-61XXE DAQ devices. The BNC-2110 is ideal for simplifying

connections between your measurement apparatus and your DAQ device

in laboratory, test, and production environments.

What You Need to Get Started

To set up and use your BNC-2110 accessory, you will need the following:

❑BNC-2110 BNC Adapter

❑BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter

Installation Guide

❑PCI-60XXE or PCI-61XXE device and the appropriate cable

Detailed specifications for the BNC-2110 are in the Specifications section

later in this guide.

BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter 2

National Instruments Corporation

Configuring Your BNC-2110

This section describes how to configure your BNC-2110 accessory.

Figure 1 shows the front panel of the BNC-2110.

Figure 1. BNC-2110 Front Panel

1 Floating Source (FS)/Ground-Reference Source

(GS) Switch

2 BNC Connectors

3 Digital Screw Terminals

National Instruments Corporation 3 BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter

Table 1 describes the BNC connectors available on the front panel of your

BNC-2110.

Connecting Analog Inputs

You can use the BNC-2110 to measure floating and ground-referenced

analog input signals. To measure floating signal sources, move switches

ACH0 through ACH7, located below the BNC connectors, to the floating

source switch position (labeled FS). In the floating source switch position,

the amplifier negative terminal is connected to ground via a 100 Ωresistor.

Table 2 shows the BNC-2110 switch configuration options.

Table 1. BNC-2110 Connector Signal Descriptions

Front Panel BNC

Connectors Signal Description

ACH<0..7> Differential Analog Channels 0 through 7

DAC0OUT Digital to Analog Converter 0 Output—This

pin supplies the voltage output of analog

output channel 0.

DAC1OUT Digital to Analog Converter 1 Output—This

pin supplies the voltage output of analog

output channel 1.

EXTREF External Reference—This is the external

reference input for analog output circuitry.

PFI0/TRIG1 Programmable Function

Input 0/Trigger 1—As an input, this is either

one of the PFIs or the source for the

hardware analog trigger.

CTR0OUT Counter 0 Output—This is the output from

the General-Purpose Counter 0 Output.

USER1 User-Defined 1—Connected to USER1

digital screw terminal block. This connector

allows you to modify a signal depending on

your application.

USER2 User-Defined 2—Connected to USER2

digital screw terminal block. This connector

allows you to modify a signal depending on

your application.

BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter 4

National Instruments Corporation

To measure ground-referenced signals, move the switches to either

the floating or ground-referenced source position. However, for best

performance, use the ground-referenced source position (labeled GS) to

avoid ground loops. Refer to your DAQ device user manual for more

information on measuring floating and ground-referenced signals.

Connecting Analog Outputs

The BNC-2110 connects to the analog output channels on the PCI-60XXE

and PCI-61XXE devices with the DAC0OUT and DAC1OUT BNC

connectors.

Connecting Digital I/O Signals

Use both the screw terminal plugs and the BNC connectors to connect

your digital signals to your DAQ device. Refer to Table 4 to make these

connections. When connecting signals to the screw terminal plugs, you

can use up to 24 AWG wire with the insulation stripped to 0.28 in. Refer

to Tables 1 and 3 for the signal names of all the labeled connectors.

Table 2. Configuration Summary

BNC-2110 Switch

Configuration

Signal Source Types

Floating Source Ground-Referenced Source

Floating Source

(FS)

Ground-

Referenced Source

(GS)

–

Signal

Source BNC-2110

DAQ Device

(Differential Input

Mode)

AIGND

–

Recommended

–

Signal

Source BNC-2110

DAQ Device

(Differential Input

Mode)

AIGND

–

Not Recommended

–

Signal

Source BNC-2110

Improper Configuration

DAQ Device

(Differential Input

Mode)

–+

–

Signal

Source BNC-2110

DAQ Device

(Differential Input

Mode)

AIGND

–

Recommended

National Instruments Corporation 5 BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter

Two user-defined BNC connectors, USER1 and USER2, are connected

to the screw terminal blocks on the BNC-2110 front panel. These screw

terminals and their associated BNC connectors give you the flexibility

to choose up to two additional digital/timing signals. For example, if an

application requires access to SCANCLK and CTR1OUT signals, you can

wire the screw terminals labeled SCANCLK and CTR1OUT to the screw

terminals labeled USER1 and USER2, respectively. This configures BNC

connector USER1 as SCANCLK and USER2 as CTR1OUT.

All of the digital and timing signals from the PCI-60XXE and PCI-61XXE

devices are available on the front panel of the BNC-2110. Refer to your

DAQ device user manual for information on using these signals.

Table 3 describes the digital screw terminals available on the front panel of

your BNC-2110.

Table 3. BNC-2110 Digital Screw Terminal Signal Descriptions

Screw Terminal Signal Description1

PFI<9..1> Programmable Function Input Lines 9

through 1

DGND Digital Ground—This pin supplies the

reference for the digital signals at the I/O

connector as well as the +5 VDC supply.

USER2 User-Defined 2—Connected to USER2

BNC. This screw terminal is used to provide

a user-definable BNC terminal.

FRQOUT Frequency Output—This output is from the

frequency generator output.

+5 V +5 V Power—These pins are fused for up

to 1 A of +5 V supply. The fuse is

self-resetting.

DIO<7..0> Digital Input/Output Lines 7

through 0—These pins can control the

up/down signal of general-purpose

counters 0 and 1, respectively.

CTR1OUT Counter 1 Output—This is the output from

the General-Purpose Counter 1 Output.

USER1 User-Defined 1—Connected to USER1

BNC. This screw terminal is used to provide

a user-definable BNC signal.

BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter 6

National Instruments Corporation

Table 4 shows the BNC-2110 connectors that you connect to your DAQ

device.

SCANCLK Scan Clock—This pin pulses once for each

A/D conversion when enabled. The

low-to-high edge indicates when the input

signal can be removed from the input or

switched to another signal.

EXSTRB* ExternalStrobe—This output canbe toggled

under software control to latch signals or

trigger events on external devices.

AISENSE Analog Input Sense—This pin serves as the

reference node for channels ACH<0..15> in

NRSE configurations.

AIGND Analog Input Ground—The analog input

voltages are referenced to this node.

1 Refer to your DAQ device user manual for more information on using these signals.

Table 4. BNC-2110 Connectors and Device Map

BNC-2110

Connectors PCI-60XXE PCI-6110E PCI-6111E

ACH<0..7> ACH<0..7> ACH<0..3> ACH<0..1>

DAC0OUT DAC0OUT DAC0OUT DAC0OUT

DAC1OUT DAC1OUT DAC1OUT DAC1OUT

EXTREF EXTREF N/A N/A

PFI0/TRIG1 PFI0/TRIG1 PFI0/TRIG1 PFI0/TRIG1

CTR0OUT CTR0OUT CTR0OUT CTR0OUT

USER1 USER1 USER1 USER1

USER2 USER2 USER2 USER2

Table 3. BNC-2110 Digital Screw Terminal Signal Descriptions (Continued)

Screw Terminal Signal Description1

National Instruments Corporation 7 BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter

Cabling

The BNC-2110 has one 68-position connector on the rear panel to connect

to your DAQ device. Refer to Table 5 to make this connection.

Caution Do not connect the BNC-2110 to any device other than the National Instruments

PCI-60XXE or PCI-61XXE devices. Doing so can damage the BNC-2110, the

DAQ device, or host computer. National Instruments is NOT liable for damages

resulting from these connections.

Installing Your BNC-2110

Refer to Figure 2 as you perform the following steps to connect your

BNC-2110 to your DAQ device. Consult your computer user manual or

technical reference manual for specific instructions and warnings.

Note You can either place the BNC-2110 on a workbench near the host computer or use

the available DIN rail-mount kit.

1. Make sure that switches ACH 0 through ACH 7 are set correctly for

your application.

2. Connect the BNC-2110 to your DAQ device. Refer to Table 5 to make

sure that you have the proper cable for the DAQ device that you are

using.

3. Connect the field signals to the BNC connectors and/or digital screw

terminal plugs. Refer to the Configuring Your BNC-2110 section

earlier in this guide for more information.

When you have finished using your BNC-2110, turn off any powered

external signals connected to your BNC-2110 before you turn off your

computer.

Table 5. BNC-2110 Cabling Options

DAQ Device Required Cable

100-pin MIO connector SH1006868

68-pin MIO connector SH6868, SH6868EP1, or R6868

50-pin MIO connector SH6850 or R6850

1 SH6868EP is necessary for use with 61XX DAQ devices.

BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter 8

National Instruments Corporation

Figure 2. Connecting the BNC-2110 to Your DAQ Device

Warning The BNC-2110 is not designed for input voltages greater than 42 V, even if a

user-installed voltage divider reduces the voltage to within the input range of the

DAQ device. Input voltages greater than 42 V can damage the BNC-2110, any

device connected to it, and the host computer. Overvoltage can also cause an

electric shock hazard for the operator. National Instruments is NOT liable for

damage or injury resulting from such misuse.

Specifications

This section lists the specifications of the BNC-2110. These specifications

are typical at 25° C unless otherwise specified.

Field connection .....................................15 BNC connectors (8 analog

input connectors, 2 analog output

connectors, 1 counter, 1 trigger,

2 user-defined, and 1 external

reference)

Screw terminal........................................30-pin

Physical

Dimensions.............................................19.05 by 10.48 by 3.51 cm

(7.5 by 4.125 by 1.38 in.)

I/O connector..........................................One 68-position male connector

1 BNC-2110 2 Shielded Cable 3 DAQ Device 4 Personal Computer

National Instruments Corporation 9 BNC-2110 Desktop and DIN Rail-Mountable BNC Adapter

BNC connectors.....................................15

Screw terminal plugs ............................. 30

Environment

Operating temperature............................0° to 70° C

Storage temperature ...............................–55° to 125° C

Relative humidity...................................5% to 90% noncondensing

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