National Instruments CB-27 Bedienungsanleitung

DAQCard

™

is a trademark of National Instruments Corporation. Product and company names are trademarks or trade names of their respective

companies.

320933B-01

INSTALLATION GUIDE

CB-27 CONNECTOR BLOCK

This installation guide describes how to connect the CB-27 connector

block.

With the CB-27 connector block, you can easily connect analog and digital

signals to the National Instruments 27-pin PCMCIA DAQ products and the

NI 4350 (PCMCIA).

The CB-27 consists of a connector block with 28 screw terminals and a

30-position right angle connector with ejector ears. Each screw terminal

corresponds to a pin number on the 30-position connector. Refer to your

DAQCard user manual for connector pinout information.

What You Need to Get Started

To set up and use your CB-27, you will need the following components:

❑CB-27 connector block

❑CB-27 Connector Block Installation Guide

❑PR27-30F I/O cable or PSH 32-30F cable (for the NI 4350 (PCMCIA))

❑CB-27 quick-reference label

❑Your DAQCard or NI 4350 (PCMCIA)

❑Your computer

❑Screwdrivers

– No. 2 Phillips-head

– 1/8 in. flathead

❑Tie wraps

CB-27 Connector Block Installation Guide 2

National Instruments Corporation

Installation

To connect the CB-27 to your DAQCard, perform the following steps:

1. Insert the DAQCard into the PCMCIA slot of your computer.

2. Plug the PR27-30F into the 27-pin connector on the DAQCard or the

PSH32-30F cable into the 32-pin connector on the NI 4350

(PCMCIA).

Caution Notice that the PR27-30F and PSH32-30F cables are keyed so that you can insert

them only one way. Do not put strain on the I/O cable when inserting it into and

removing it from the DAQCard and the CB-27 connector block.

3. Connect your signals to the CB-27 connector block. (Refer to Signal

Connections below for instructions.)

4. Insert the other end of the PR27-30F or PSH32-30F cable into the

CB-27connector.Thecableconnector iskeyedwith acentered tabthat

you must align with the slot on the CB-27 mating header. Firmly push

in the cable connector until the ejector ears on the CB-27 connector

snap into position.

Note Make sure that the PR27-30F ribbon cable or the PSH32-30F cable is not twisted

between the DAQCard and the CB-27.

Figure 1 shows an example of a typical configuration.

National Instruments Corporation 3 CB-27 Connector Block Installation Guide

Figure 1. A Typical Configuration

Signal Connection

Note A blank quick-reference label that shows the screw terminals for DAQCards is

shipped with your CB-27. You can fill in the blanks with the signal information

from your DAQCard user manual and put the label on the inside of the CB-27

cover for easy reference. (Your DAQCard kit also contains a completed

quick-reference label.)

To connect the signals to the connector block, refer to Figure 2 as you

perform the following steps:

1. Make sure that the PR27-30F or PSH32-30F cable is disconnected

from the CB-27. (Refer to Cable Removal below for instructions.)

2. Remove the screws from the bottom of the CB-27 to remove the top

cover and the front panel.

PCMCIA Socket

Portable

Computer

PR27-30F or

PSH32-30F

I/O Cable CB-27

I/O Signals

CB-27

CB-27 Connector Block Installation Guide 4

National Instruments Corporation

3. Connect the wires to the screw terminals by stripping off 1/4 in. of the

wire insulation and inserting the wires (26–18 AWG) into the screw

terminals. Tighten the screws.

4. After you connect the wires to the screw terminals, attach the wires to

the CB-27. Bunch the wires from one side of the connector block and

tie them to a strain-relief tab using a tie wrap (see Figure 2b). Repeat

for the other side of the connector block.

5. Replace the front panel andthe top cover and reinsert thescrews. Make

sure all the wires come out of the front panel openings.

Figure 2. Connecting Signals to the CB-27

You now can connect the connector block to the PR27-30F or PSH32-30F

cable.

Front Panel

Ejector Ears

Strain-Relief Tabs Tie Wrap

Signal Wires

Screw Terminals

30-Position Connector

Top Cover

a. Components b. Using the Strain-Relief Tabs

National Instruments Corporation 5 CB-27 Connector Block Installation Guide

Cable Removal

To remove the PR27-30F or PSH32-30F I/O cable, perform the following

steps:

1. Grasp the cable connector near the DAQCard and pull it straight out.

(If you pull the cable out using a rocking motion or pull directly on the

cable, you may damage the pins on the cable or on the DAQCard.)

Remember to push on the latching ears of the PSH32-30F cable before

disconnecting it from the NI 4350 (PCMCIA).

2. Press outward on the ejector ears of the CB-27 connector. The cable

connector will pop out.

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