Racal Instruments 1264C User manual

6-SLOT VXIbus MAINFRAME
USER MANUAL
MODEL 1264C
PUBLICATION NO. 980827
RACAL INSTRUMENTS
United States
(Corporate Headquarters and Service Center)
4 Goodyear Street, Irvine, CA 92618
Tel: [phone]; Fax: [phone]
5730 Northwest Parkway Suite 700, San Antonio, TX 78249
Tel: [phone]; Fax: [phone]
Europe
(European Headquarters and Service Center)
18 Avenue Dutartre, 78150 LeChesnay, France
Tel: [phone]; Fax: [phone]
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Tel: [phone]; Fax: [phone]
Via Milazzo 25, 20092 Cinisello B, Milan, Italy
Tel: [phone]; Fax: [phone]
Racal Instruments Group Limited, Technologie Park, D-51429 Bergisch Gladbach
Tel: [phone]; Fax: [phone]
[e-mail]
[e-mail]
[e-mail]
http://www.racalinstruments.com
[e-mail]
www.racalinstruments.de
PUBLICATION DATE: February 24, 2003
Copyright 1998 by Racal Instruments, Inc. Printed in the United States of America. All rights reserved.
This book or parts thereof may not be reproduced in any form without written permission of the publisher.

THANK YOU FOR PURCHASING THIS RACAL INSTRUMENTS PRODUCT.
For this product, or any other Racal Instruments product that incorporates software drivers, you may access
our web site to verify and/or download the latest driver versions. The web address for driver downloads is:
http://www.racalinstruments.com/downloads
If you have any questions about software driver downloads or our privacy policy, please contact us at
[e-mail].
WARRANTY STATEMENT
All Racal Instruments, Inc. products are designed and manufactured to exacting standards and in full
conformance to Racal’s ISO 9000\2000 procedures.
This warranty does not apply to defects resulting from any modification(s) of any product or part without Racal
Instruments express written consent, or misuse of any product or part. The warranty also does not apply to
fuses, software, non-rechargeable batteries, damage from battery leakage, or problems arising from normal
wear, such as mechanical relay life, or failure to follow instructions.
This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of
merchantability or fitness for a particular use. The remedies provided herein are buyer’s sole and exclusive
remedies.
For the specific terms of your standard warranty, or optional extended warranty or service agreement, contact
your Racal customer service advisor. Please have the following information available to facilitate service.
1. Product serial number
2. Product model number
3. Your company and contact information
You may contact your customer service advisor by:
E-Mail: [e-mail]
Telephone: [phone] (USA)
[phone] (UK)
Fax: [phone] (USA)
[phone] (UK)

RETURN of PRODUCT
Authorization is required from Racal Instruments before you send us your product for service or calibration.
Call your nearest Racal Instruments support facility. A list is located on the last page of this manual. If you are
unsure where to call, contact Racal Instruments, Inc. Customer Support Department in Irvine, California, USA
at 1-800-722-3262 or 1-949-859-8999 or via fax at 1-949-859-7139. We can be reached at:
[e-mail].
PROPRIETARY NOTICE
This document and the technical data herein disclosed, are proprietary to Racal Instruments, and shall not,
without express written permission of Racal Instruments, be used, in whole or in part to solicit quotations from
a competitive source or used for manufacture by anyone other than Racal Instruments. The information herein
has been developed at private expense, and may only be used for operation and maintenance reference
purposes or for purposes of engineering evaluation and incorporation into technical specifications and other
documents which specify procurement of products from Racal Instruments.
DISCLAIMER
Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should
ensure that they are used properly and in accordance with this handbook and any other instructions provided
by Seller. Racal Instruments products are not specifically designed, manufactured or intended to be used as
parts, assemblies or components in planning, construction, maintenance or operation of a nuclear facility, or
in life support or safety critical applications in which the failure of the Racal Instruments product could create
a situation where personal injury or death could occur. Should Buyer purchase Racal Instruments product for
such unintended application, Buyer shall indemnify and hold Racal Instruments, its officers, employees,
subsidiaries, affiliates and distributors harmless against all claims arising out of a claim for personal injury or
death associated with such unintended use.

FOR YOUR SAFETY
Before undertaking any troubleshooting, maintenance or exploratory procedure, read carefully the
WARNINGS and CAUTION notices.
This equipment contains voltage hazardous to
human life and safety, and is capable of
inflicting personal injury.
If this instrument is to be powered from the AC line (mains) through an
autotransformer, ensure the common connector is connected to the neutral (earth
pole) of the power supply.
Before operating the unit, ensure the conductor (green wire) is connected to the
ground (earth) conductor of the power outlet. Do not use a two-conductor extension
cord or a three-prong/two-prong adapter. This will defeat the protective feature of the
third conductor in the power cord.
Maintenance and calibration procedures sometimes call for operation of the unit with
power applied and protective covers removed. Read the procedures and heed
warnings to avoid “live” circuit points.
Before operating this instrument:
1. Ensure the proper fuse is in place for the power source to operate.
2. Ensure all other devices connected to or in proximity to this instrument are properly grounded or
connected to the protective third-wire earth ground.
If the instrument:
- fails to operate satisfactorily
- shows visible damage
- has been stored under unfavorable conditions
- has sustained stress
Do not operate until, performance is checked by qualified personnel.

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i
Table Of Contents
Chapter 1.......................................................................................................................... 1-1
GETTING STARTED .................................................................................................................. 1-1
Product Description ................................................................................................................. 1-1
Key Features........................................................................................................................... 1-1
Portable Bench Top Mainframe............................................................................................... 1-2
Rack Mount Configuration (5U Footprint) ................................................................................ 1-3
Modular Mainframe Design...................................................................................................... 1-4
500 Watts Usable DC Power................................................................................................... 1-5
Positive Pressure Cooling System........................................................................................... 1-6
System Monitor ....................................................................................................................... 1-7
Rack Mount Options................................................................................................................ 1-8
Backplane ............................................................................................................................... 1-8
Items Shipped With The 1264C............................................................................................... 1-9
Spares & Optional Equipment ................................................................................................. 1-9
Chapter 2.......................................................................................................................... 2-1
CONFIGURING THE 1264C....................................................................................................... 2-1
Using This Chapter.................................................................................................................. 2-1
AC Mains Power...................................................................................................................... 2-1
Site Considerations ................................................................................................................. 2-1
Installing VXI Modules............................................................................................................. 2-2
Installation and Removal of Card Guide Covers ...................................................................... 2-2
Installation of Rack Mount Options .......................................................................................... 2-3
Installing Blanking Panels........................................................................................................ 2-4
Connecting Chassis Ground.................................................................................................... 2-5
Chapter 3.......................................................................................................................... 3-1
OPERATING THE 1264C ........................................................................................................... 3-1
Using This Chapter.................................................................................................................. 3-1
1264C Front Panel .................................................................................................................. 3-1
1264C Rear View .................................................................................................................... 3-2
Power The Mainframe ON/OFF............................................................................................... 3-2

ii
Monitoring Basics.....................................................................................................................3-3
Backplane Connections.....................................................................................................3-4
Basic Functional Check............................................................................................................3-7
Chapter 4...........................................................................................................................4-1
UNDERSTANDING THE 1264C ..................................................................................................4-1
Overview ..................................................................................................................................4-1
Power Supply ...........................................................................................................................4-1
Power Supply Interconnections.............................................................................................4-1
Power Supply Protections.....................................................................................................4-3
Backplane ................................................................................................................................4-3
AC Interface.............................................................................................................................4-4
Cooling System ........................................................................................................................4-4
(Freestanding Unit Description) ............................................................................................4-4
Cooling The Power Supply ...................................................................................................4-4
System Monitor ........................................................................................................................4-4
Voltage Monitor ....................................................................................................................4-6
Fan Monitor ..........................................................................................................................4-6
Temperature Monitor ............................................................................................................4-6
ACFAIL* and SYSRESET* Signals.......................................................................................4-6
Chapter 5...........................................................................................................................5-1
MAINTENANCE...........................................................................................................................5-1
What’s In This Chapter ............................................................................................................5-1
Calibration................................................................................................................................5-1
Service Strategy.......................................................................................................................5-1
Service Interval ........................................................................................................................5-1
Preparation ..............................................................................................................................5-1
Inspection and Cleaning...........................................................................................................5-2
Interior Cleaning ...................................................................................................................5-2
Exterior Cleaning ..................................................................................................................5-2
Cleaning The Fan Filters ..........................................................................................................5-3
Modular Component Removal and Replacement .....................................................................5-4
Tools Required .....................................................................................................................5-4
Removal and Replacement of The Fan Assembly....................................................................5-5
Removal and Replacement of The Power Supply Assembly ....................................................5-6
Removal and Replacement of The AC Mains Fuse..................................................................5-9
Removing and Replacing The Card Guides ...........................................................................5-11

iii
Trouble-shooting The 1264C................................................................................................. 5-12
Assembly Drawings............................................................................................................... 5-14
Parts List ............................................................................................................................... 5-44
Chapter 6.......................................................................................................................... 6-1
PRODUCT SUPPORT ................................................................................................................ 6-1
Product Support ...................................................................................................................... 6-1
Warranty ................................................................................................................................. 6-1
Support Offices ....................................................................................................................... 6-2
Appendix A ................................................................................................................................. A-1

iv
List Of Figures
Figure 1-1, 1264C Portable Mainframe In Bench Top Configuration............................................1-2
Figure 1-2, 1264C Rack Mount (5U Tall) Configuration ...............................................................1-3
Figure 1-3, Modular Service Friendly Mainframe Design Features. .............................................1-4
Figure 1-4, 1264C 500 Watt Modular Power Supply. ...................................................................1-5
Figure 1-5, 1264C Positive Pressure Cooling System. ................................................................1-6
Figure 1-6, 1264C System Monitor ..............................................................................................1-7
Figure 2-1, AirFlow Directors (Card Guide Covers)......................................................................2-2
Figure 2-2, Blanking Panels.........................................................................................................2-4
Figure 2-3, Connecting Safety Ground ........................................................................................2-5
Figure 3-1, 1264C Front View......................................................................................................3-1
Figure 3-2, 1264C Rear View ......................................................................................................3-2
Figure 4-1, Functional Block Diagram For 1264C Mainframe ......................................................4-2
Figure 4-2, System Monitor Block Diagram..................................................................................4-5
Figure 5-1, Cleaning The Fan Filter .............................................................................................5-3
Figure 5-2, Fan Assembly/Rear Panel Removal ..........................................................................5-5
Figure 5-3, Removing The Power Supply ....................................................................................5-6
Figure 5-4, Loosening The 14 Screws. ........................................................................................5-7
Figure 5-5 Removing and Replacing The AC Mains Fuse ...........................................................5-9
Figure 5-6, Card Guide Removal and Replacement ..................................................................5-11
Figure A-1 Mainframe Worst Case Slot Cooling Curve ............................................................... A-3
Figure A-2 View of 1264C with Rack Mount Option .................................................................... A-6

v
List Of Tables
Table 1-1 1264C Available DC Current ....................................................................................... 1-5
Table 3-1 Monitoring Basics........................................................................................................ 3-3
Table 3-2 P1 Connector Pinouts ................................................................................................. 3-4
Table 3-3 P2 Connector Pinouts For All Non-Slot 0 Locations .................................................... 3-5
Table 3-4 P2 Connector Pinouts for VXIbus Slot 0 ..................................................................... 3-6
Table 3-5 Power Supply Voltages at the P1 and P2 Connectors................................................. 3-7
Table 5-1 Troubleshooting ........................................................................................................ 5-13
Table A-1 AC Input Specifications...............................................................................................A-1
Table A-2 DC Output Power .......................................................................................................A-2
Table A-3 Cooling ....................................................................................................................... A-3
Table A-4 Safety ......................................................................................................................... A-4
Table A-5 Environmental.............................................................................................................A-4
Table A-6 Backplane................................................................................................................... A-5
Table A-7 Mechanical ................................................................................................................. A-5
Table A-8 System Monitoring Specifications (Typical)................................................................. A-6

vi
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1264C User Manual
Racal Instruments © 1998 Getting Started 1-1
Chapter 1
GETTING STARTED
Product
Description
The Model 1264C 6-Slot Mainframe is a 6-slotVXIbus Mainframe.
The 1264C can accommodate 6 C-size VXI modules. The Model
1264C fully complies with the VXIbus Specification Revision 2.0
(and earlier) requirements and is VXIplug&play compatible.
Key Features Figures 1-1 through 1-6 and the descriptions below detail the key
features of the 1264C.
Ease of Use
· Light Weight Portable Mainframe. The compact 1264C
weighs only 27 pounds and is ideal for portable applications.
· Fast Setup. The 1264C backplane uses active-automatic
VME interrupt acknowledge and bus grant daisy chaining.
Manual configuration of backplane switch settings or jumpers
has been eliminated.
· Monitoring. The 1264C standard monitoring gives you key
system health status (Voltage, Fan, and Temperature) with
front panel LED annunciators for each VXI voltage, the cooling
fan, and temperature monitor.
· Modular Power Supply, and Fan Assembly. The 1264C
modular system design results in a virtually wireless mainframe
with low MTTR and high MTBF. See Figure 1-3.

1264C User Manual
Getting Started1-2 Racal Instruments © 1998
Portable Bench
Top Mainframe
The 1264C is a portable high performance 6-slot VXI mainframe
(21.31L x 8.71W x 16.75H inches).
Figure 1-1, 1264C Portable Mainframe In Bench Top Configuration.

1264C User Manual
Racal Instruments © 1998 Getting Started 1-3
Rack Mount
Configuration
(5U Footprint)
The 1264C mainframe is designed for rack mounting in a 5U tall
rack space.
Figure 1-2, 1264C Rack Mount (5U Tall) Configuration

1264C User Manual
Getting Started1-4 Racal Instruments © 1998
Modular
Mainframe
Design
The 1264C highly modular design includes a wireless power
interface between the power supply and the VXI backplane. The
result is a low MTTR and high MTBF.
Figure 1-3, Modular Service Friendly Mainframe Design Features.

1264C User Manual
Racal Instruments © 1998 Getting Started 1-5
500 Watts
Usable DC
Power
Figure 1-4 depicts the 1264C mainframe’s 500Watt modular power
supply. Table 1-1 lists the available DC current for each VXI
voltage.
Figure 1-4, 1264C 500 Watt Modular Power Supply.
VXI Voltage Available DC Current
+5V
-5.2V
-2V
+12V
-12V
+24V
-24V
45 Amps
30 Amps
15 Amps
8 Amps
8 Amps
4 Amps
4 Amps
Table 1-1 1264C Available DC Current

1264C User Manual
Getting Started1-6 Racal Instruments © 1998
Positive
Pressure
Cooling System
The 1264C uses forced air positive pressure cooling to direct air
to the VXI modules.
Figure 1-5 details the cooling system.
Figure 1-5, 1264C Positive Pressure Cooling System.

1264C User Manual
Racal Instruments © 1998 Getting Started 1-7
System Monitor The System Monitor features include a window comparator on
each VXIbus voltage, fan failure indicator, and a power supply
intake air temperature monitor. Each monitor includes a front
panel LED annunciator.
Figure 1-6, 1264C System Monitor
System
Monitor

1264C User Manual
Getting Started1-8 Racal Instruments © 1998
Rack Mount
Options
The 1264C is available with two rack mount options.
Option 01 includes rack mount ears, and slides.
Options 04 consist of rack mount ears only.
Backplane The 1264C backplane can accommodate up to six C-size VXI
modules.
The 1264C has a jumperless auto-configurable backplane using
active-automatic daisy chaining for the VME Interrupt acknowledge
and bus grant daisy chain signal lines. This eliminates the need to
manually configure the backplane.
Distribution of the CLK10 reference clock is full differential
providing a low skew timing source.
Power is supplied to the backplane through a direct connection to
the 1264C-power supply eliminating wiring and sub-backplane
interconnects. The result is increased reliability and improved
dynamic current performance.