IMAQ SCB-68 Connector Block and IMAQ SH68

INSTALLATION GUIDE
IMAQ™ SCB-68 CONNECTOR BLOCK
AND IMAQ SH68-C68 CABLE
This guide describes how to connect and use the IMAQ SCB-68 68-pin
shielded connector block with the IMAQ SH68-C68 cable and any
National Instruments image acquisition (IMAQ) devices featuring a
68-pin VHDCI connector.
Caution Use the SH68-C68 cable with IMAQ devices only. Do not use data acquisition
(DAQ) cables with IMAQ devices. Using the SH68-C68 cable with other devices or using
DAQ cables with IMAQ devices may result in damages to your device or your computer.
National Instruments is not liable for any damages or injuries resulting from improper use
or connection.
Introduction
The IMAQ SCB-68 68-pin connector block is a shielded board with
68 screw terminals that connects to IMAQ devices featuring the 68-pin
VHDCI connector.
The terminal block has 68 screw terminals for easy connection to signal
wires. When you use the IMAQ SCB-68 shielded connector block with
your IMAQ device, set the switches as shown in the Switch Settings section
to obtain a generic 68-screw terminal connector block. The IMAQ SCB-68
also features a strain-relief bar for securing signal wires or cables.
The IMAQ SH68-C68 cable connects your IMAQ device to the IMAQ
SCB-68 connector block.
IMAQ ™, National Instruments™, NI™, and ni.com™ are trademarks of National Instruments Corporation. Product and company names mentioned
herein are trademarks or trade names of their respective companies.
373053A-01
Copyright © 2001 National Instruments Corp. All rights reserved.
May 2001
What You Need to Get Started
To install and connect signals to the IMAQ SCB-68 connector block,
you will need the following items:
❑ IMAQ SCB-68 68-pin shielded connector block
❑ IMAQ SH68-C68 cable
❑ IMAQ SCB-68 Connector Block and IMAQ SH68-C68 Cable
Installation Guide
❑ IMAQ SCB-68 quick reference label (included with your
IMAQ SCB-68 kit)
❑ Your IMAQ device and documentation
❑ Your camera or other video sources
❑ Number 1 and 2 Phillips screwdrivers
❑ 0.125 in. flathead screwdriver
❑ Long-nose pliers
❑ Wire cutters
❑ Wire insulation strippers
❑ Soldering iron and solder
❑ Resistors and capacitors (specific to your application)
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Switch Settings
You must change the IMAQ SCB-68 switch settings to the generic screw
terminals switch configuration, as shown in Figure 1, before you connect
your IMAQ SH68-C68 cable to the IMAQ SCB-68 connector block.
This setting change disconnects the IMAQ SCB-68 temperature sensor
and accessory grounds.
S1
S2
S5 S4 S3
Figure 1. IMAQ SCB-68 Switch Settings
IMAQ Quick Reference Label
The quick reference label illustrates switch configuration and defines screw
terminal pinouts for your IMAQ device. Attach the quick reference label to
the inside cover of the connector block for quick reference.
Safety Information
The following paragraphs contain important safety information you must follow
when installing and operating the device.
Caution
Do not operate the device in a manner not specified in the documentation.
Misuse of the device may result in a hazard and may compromise the safety
protection built into the device. If the device is damaged, turn it off and do
not use it until service-trained personnel can check its safety. If necessary,
return the device to National Instruments for repair.
Keep away from live circuits. Do not remove equipment covers or shields
unless you are trained to do so. If signal wires are connected to the device,
hazardous voltages can exist even when the equipment is turned off. To
avoid a shock hazard, do not perform procedures involving cover or shield
removal unless you are qualified to do so. Disconnect all field power prior
to removing covers or shields.
If the device is rated for use with hazardous voltages (>30 Vrms, 42.4 Vpk,
or 60 Vdc), it may require a safety earth-ground connection wire. See the
device specifications for maximum voltage ratings.
© National Instruments Corporation
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IMAQ SCB-68 and SH68-C68 Installation Guide
Because of the danger of introducing additional hazards, do not install
unauthorized parts or modify the device. Use the device only with the
chassis, modules, accessories, and cables specified in the installation
instructions. All covers and filler panels must be installed while operating
the device.
Do not operate the device in an explosive atmosphere or where flammable
gases or fumes may be present. Operate the device only at or below the
pollution degree stated in the specifications. Pollution consists of any
foreign matter—solid, liquid, or gas—that may reduce dielectric strength
or surface resistivity. Pollution degrees are listed below:
•
Pollution Degree 1—No pollution or only dry, nonconductive
pollution occurs. The pollution has no effect.
•
Pollution Degree 2—Normally only nonconductive pollution occurs.
Occasionally, nonconductive pollution becomes conductive because of
condensation.
•
Pollution Degree 3—Conductive pollution or dry, nonconductive
pollution occurs. Nonconductive pollution becomes conductive
because of condensation.
Insulate signal connections for the maximum voltage for which the device
is rated. Do not exceed the maximum ratings for the device. Remove power
from signal lines before connection to or disconnection from the device.
Operate this device only at or below the installation category stated in the
specifications. Installation categories are listed below:
•
Installation Category I—for measurements performed on circuits not
directly connected to mains. Examples include measurements on
circuits not derived from mains, and specially-protected (internal)
mains-derived circuits.
•
Installation Category II—for measurements performed on circuits
directly connected to the low-voltage installation. Examples include
measurements on household appliances, portable tools, and other
similar equipment.
•
Installation Category III—for measurements performed in the building
installation. Examples include measurements on distribution boards,
circuit-breakers, wiring (including cables), bus bars, junction boxes,
switches, socket outlets in the fixed installation, equipment for
industrial use, and some other types of equipment, such as stationary
motors permanently connected to the fixed installation.
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•
Installation Category IV—for measurements performed at the source
of the low-voltage installation. Examples include electricity meters,
measurements on primary overcurrent protection devices, and ripplecontrol units.
Clean the device and accessories by brushing off light dust with a soft,
nonmetallic brush. Remove other contaminants with a stiff, nonmetallic
brush. The unit must be completely dry and free from contaminants before
returning it to service.
Installation
Attach one end of the SH68-C68 cable to your IMAQ device and attach the
other end to the IMAQ SCB-68 connector block, as seen in Figure 2.
Tighten the thumbscrews as necessary.
4
1
2
1
IMAQ Device
2
3
Thumbscrews
3
IMAQ SH68-C68 Cable
4
IMAQ SCB-68 Connector Block
Figure 2. Connecting the SH68-C68 Cable to Your IMAQ Device
and IMAQ SCB-68 Connector Block
© National Instruments Corporation
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IMAQ SCB-68 and SH68-C68 Installation Guide
Signal Connections
This section explains how to connect the signal to the IMAQ SCB-68.
For more information on the parts mentioned in signal connection, refer to
the parts locator diagram in Figure 3.
The following warnings contain important safety information concerning
hazardous voltages and terminal blocks.
Caution Avoid live circuits. To avoid electrical shock, do not remove equipment
covers or shields unless you are qualified to do so. If signal wires are connected to the
IMAQ SCB-68, dangerous voltages may exist even when the equipment is turned off.
Before removing the cover, disconnect the AC power or any live circuit from the terminal
block.
The chassis ground terminals on your IMAQ SCB-68 are for grounding
high-impedance sources such as a floating source (1 mA maximum). Do not use these
terminals as safety earth grounds.
Caution
Caution Do not connect high voltages (≥42 Vrms). National Instruments is not liable for
any damages or injuries resulting from improper use or connection.
To connect the signal to the IMAQ SCB-68, perform the following steps:
1.
If connected, disconnect the 68-pin cable from the IMAQ SCB-68.
2.
Remove the screws on either side of the top cover with a Number 1
Phillips screwdriver and open the top cover.
3.
Configure the switches, as explained in the Switch Settings section in
this guide.
4.
Adjust the strain-relief hardware.
a.
Loosen the strain-relief screws with a Number 2 Phillips
screwdriver and slide the signal wires through the front panel
strain-relief opening.
b.
Remove the top strain-relief bar if you are connecting multiple
signals.
5.
Add insulation or padding if necessary.
6.
Connect the wires to the screw terminals.
a.
Strip 1/4 in. of the insulation.
b.
Insert the wires into the green terminals.
c.
Tighten the screws.
7.
Reinstall strain-relief (if removed) and tighten the strain-relief screws.
8.
Close the top cover.
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9.
Reinsert the screws on the sides of the top cover to ensure
proper shielding.
10. Using the SH68-C68 cable, connect the terminal block to the 68-pin
connector on your IMAQ device.
4
5
6
3
7
8
2
9
1
SCB-68
10
© COPYRIGHT 1993
13
12
14
1
2
3
4
5
6
7
Product Name
Pads for Analog Input Conditioning
Switches S3, S4, and S5
R20 (see fuse and power)
68-Pin I/O Connector
Fuse (0.8 A)
Switches S1 and S2
11
14
8
9
10
11
12
13
14
Assembly Number and Revision Letter
Screw Terminals
Serial Number
RC Filters and Attenuators for DACO, DAC1, and Ext. Trig.
Breadboard Area
Cold-Junction Compensation Temperature Sensor (not used)
Board Mount Screws
Figure 3. IMAQ SCB-68 Terminal Block Parts Locator Diagram
© National Instruments Corporation
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IMAQ SCB-68 and SH68-C68 Installation Guide
Removing the Board
You can remove the board from its housing in order to solder components
into place. To remove the board, perform the following steps:
1.
If connected, disconnect the 68-pin cable from the IMAQ SCB-68.
2.
Remove the screws on both sides of the top cover using a Number 1
Phillips screwdriver.
3.
Open the top cover.
4.
Loosen the strain-relief screws with a Number 2 Phillips screwdriver.
5.
Remove the signal wires from the screw terminals.
6.
Remove the board mount screws and 68-pin connector screws.
7.
Remove the jack sockets using a 3/16 hex wrench.
8.
Tilt the board up and pull it out of the housing.
Adding Components to the IMAQ SCB-68
Printed Circuit Board
Some applications may require you to make modifications to the printed
circuit board, usually in the form of adding components or cutting jumpers.
Follow these guidelines when modifying your IMAQ SCB-68 printed
circuit board:
•
Use a low-wattage soldering iron (20 to 30 W) when soldering to the
board.
•
Use vacuum-type tools to desolder on the IMAQ SCB-68. Use caution
when desoldering to avoid damaging component pads.
•
Use only rosin-core, electronic-grade solder. Acid-core solder can
damage the printed circuit board and components.
To make signal modifications more efficient, jumper traces are located next
to each analog screw terminal. You can cut these jumper traces with a razor
blade or any instrument designed for precise cutting. Cutting the jumper
traces will disconnect the signal from the screw terminal. See Figure 3 for
more detail.
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Specifications
This section lists the IMAQ SCB-68 specifications. These ratings are
typical at 25 °C unless otherwise stated.
General
Number of screw terminals .................... 68
Maximum Working Voltage
Channel to earth ..................................... 5 V, Installation Category I
(signal voltage plus
common-mode voltage)
Channel to channel................................. 5 V, Installation Category I
(signal voltage plus
common-mode voltage)
Physical
Box dimensions (including feet) ............ 19.6 by 15.2 by 4.6 cm
(7.7 by 6.0 by 1.8 in.)
I/O connectors ........................................ One 68-pin male 0.050 series
shielded D type connector
Environmental
Operating temperature............................ 0 to 55 °C
Storage temperature ............................... –20 to 70 °C
Humidity ................................................ 10 to 90% RH, noncondensing
Maximum altitude .................................. 2000 meters
Pollution degree ..................................... 2
Usage...................................................... Indoor use only
© National Instruments Corporation
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IMAQ SCB-68 and SH68-C68 Installation Guide
Electromagnetic Compatibility
EMC/EMI ...............................................CE, C-Tick, and FCC Part 15
(Class A) Compliant
Electrical emissions ................................EN 55011 Class A at 10 meters
FCC Part 15A above 1 GHz
Electrical immunity ................................Evaluated to EN 61326:1997/
A1:1998, Table 1
For full EMC compliance, you must operate this device with shielded cabling. In
addition, all covers and filler panels must be installed. See the Declaration of Conformity
(DoC) for this product for any additional regulatory compliance information. To obtain the
DoC for this product, click Declaration of Conformity at ni.com/hardref.nsf/. This
Web site lists the DoCs by product family. Select the appropriate product family, followed
by your product, and a link to the DoC (in Adobe Acrobat format) appears. Click the
Acrobat icon to download or read the DoC.
Note
Safety
These devices meet the requirements of the following standards for safety
for electrical equipment for measurement, control, and laboratory use:
EN 61010-1:1993/A2:1995, IEC 61010-1:1990/A2:1995
UL 3101-1:1993, UL 3111-1:1994, UL 3121:1998
CAN/CSA C22.2 no. 1010.1:1992/A2:1997
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