Racal Instruments 1260-132 User manual

1260 VXI
SWITCHING CARD
1260-132
HIGH VOLTAGE PLUG-IN
PUBLICATION NO. 980824-132
RACAL INSTRUMENTS
Racal Instruments, Inc.
4 Goodyear St., Irvine, CA 92618-2002
Tel: (800) RACAL-ATE, [phone], [phone]; FAX: [phone]
Racal Instruments, Ltd.
480 Bath Road, Slough, Berkshire, SL1 6BE, United Kingdom
Tel: [phone]; FAX: [phone]
Racal Systems Electronique S.A.
18 Avenue Dutartre, 78150 LeChesnay, France
Tel: [phone]; FAX: [phone]
Racal Systems Elettronica s.r.l.
Strada 2-Palazzo C4, 20090 Milanofiori Assago, Milan, Italy
Tel: [phone]; FAX [phone]
Racal Elektronik System GmbH.
Technologiepark Bergisch Gladbach, Friedrich-Ebert-Strasse, D-51429 Bergisch Gladbach, Germany
Tel.: [phone]; FAX: [phone]
Racal Instruments, Ltd.
Unit 5, 25F., Mega Trade Center, No 1, Mei Wan Road, Tsuen Wan, Hong Kong, PRC
Tel: [phone], FAX: [phone]
http://www.racalinstruments.com
PUBLICATION DATE: Aug., 30, 2002
Copyright 2002 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
You will be asked to register one time only to gain access to the driver and product manual downloads sections.
At registration a cookie will be placed on your computer if you choose to accept it. This is done to facilitate your
use of these sections on future visits. You may refuse to accept the cookie and still have complete access to
the software driver database but will have to re-register every time you visit. This cookie is for ease of use only
and no information is gathered for, sold, or reported to, any third party organization.
If you have any questions about software driver downloads or our privacy policy, please contact us at
[email protected].
WARRANTY STATEMENT
All Racal Instruments, Inc. products are designed and manufactured to exacting standards and in full
conformance to Racal’s ISO 9001 procedures.
This warranty does not apply to defects resulting from any modification(s) of any product or part without Racal’s
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: [email protected]
Telephone: [phone] (USA)
[phone] (UK)
[phone] (Hong Kong)
Fax: [phone] (USA)
[phone] (UK)
[phone] (Hong Kong)

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:
[email protected].
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. RII 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 RII product could create a situation where personal injury or death
could occur. Should Buyer purchase RII product for such unintended application, Buyer shall indemnify and hold
RII, 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 instrument is configured to operate on the voltage at the power source. See
Installation Section.
2. Ensure the proper fuse is in place for the power source to operate.
3. 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.

1260-132 User Manual
i
Table of Contents
Chapter 1........................................................................................................................................1-1
Introduction.....................................................................................................................................1-1
SPECIFICATIONS ..........................................................................................................................1-1
Specifications.................................................................................................................................1-2
Power Dissipation..........................................................................................................................1-3
About MTBF....................................................................................................................................1-4
Ordering Information......................................................................................................................1-5
Chapter 2........................................................................................................................................2-1
INSTALLATION INSTRUCTIONS ...................................................................................................2-1
Unpacking and Inspection..............................................................................................................2-1
Reshipment Instructions................................................................................................................2-2
Installation.......................................................................................................................................2-2
Module Configurations....................................................................................................................2-3
Front Panel Connectors.............................................................................................................2-3
Mating Connectors......................................................................................................................2-6
Chapter 3........................................................................................................................................3-1
MODULE OPERATION..................................................................................................................3-1
Setting the Module Address...........................................................................................................3-1
1256 Operation...............................................................................................................................3-1
VXI Operating Modes......................................................................................................................3-1
Operating In VXI Message-Based Mode........................................................................................3-3
Channel Descriptors For The 1260-132.....................................................................................3-3
Power Up Relay Default State....................................................................................................3-4
Reply To The MOD:LIST? Command........................................................................................3-5
Operating in VXI Register-Based Mode.........................................................................................3-5
1260-132 Example Code............................................................................................................3-8
Chapter 4........................................................................................................................................4-1
OPTIONAL ASSEMBLIES..............................................................................................................4-1
Chapter 5........................................................................................................................................5-1
PRODUCT SUPPORT...................................................................................................................5-1

1260-132 User Manual
ii
Product Support..............................................................................................................................5-1
Reshipment Instructions.................................................................................................................5-1
Support Offices...............................................................................................................................5-2
Repair and Calibration Request Form..........................................................................................5-23

1260-132 User Manual
iii
List of Figures
Figure 2-1, Front-Panel Connector Pin Numbering...........................................................................2-3
Table 2-1, 1260-132 Front-Panel Connections .................................................................................2-4
Figure 2-2 Relay Diagram..................................................................................................................2-5
Figure 2-3, Block Diagram.................................................................................................................2-6
Figure 3-1, Message-Based Mode of Operation................................................................................3-2
Figure 3-2, Register-Based Mode of Operation.................................................................................3-2
Table 3-1, Control Register Channel Assignments...........................................................................3-6
List of Tables
Table 2-1, 1260-132 Front-Panel Connections .................................................................................2-4
Table 3-1, Control Register Channel Assignments...........................................................................3-6

1260-132 User Manual
iv
This page was left intentionally blank.

1260-132 User Manual
Module Specification 1-1
Chapter 1
Introduction The 1260-132 is a plug-in switch module developed for the Racal
Instruments 1260-100 Adapt-a-Switch Carrier and the 1256 Switch
Controller. The 1260-132 includes the following features:
•Standard plug-in design, providing for ease of replacement.
•Data-Driven embedded descriptor, allowing immediate use with
any Option-01T or 1256 switch controller, regardless of
firmware revision level.
•1x23 Isolated Two Wire High-Voltage Multiplexer.

1260-132 User Manual
Module Specification 1-2
SPECIFICATIONS
Specifications Maximum Switching Voltage
AC 1000 VAC pk-pk
DC 1000 VDC
Switching Current
AC 2.0 AACrms
DC 2.0 A
Switching Power
AC 60 VA
DC 60 W
Minimum Breakdown ≥1.5 KV
Initial Path resistance ≤.5 Ω
Insulation resistance ≥109Ω
Thermal EMF ≤40 uV
Bandwidth (-3dB) ≥5 MHz
Insertion Loss
1 MHz ≤0.2 dB
5 MHz < 0.5 dB
Isolation
1 MHz ≥60 dB
10 MHz ≥30 dB
Capacitance
Channel-Ground ≤150 pF
Open-Channel ≤10 pF
Relay Settling Time ≤2 ms
Shock 30g, 11 ms, ½ sine wave

1260-132 User Manual
Module Specification 1-3
Vibration 0.013 in. Pk-Pk, 5-55 Hz
Bench Handling 4 in., 45°
Cooling See 1260-100 or 1256 cooling data
Temperature
Operating 0°C to +55°C
Non-operating -40°C to +75°C
Relative Humidity 85% ±5% non-condensing at
≤35°C
AltitudeOperating 10,000 feet
Non-operating 15,000 feet
Power Requirements
+5 VDC ≤1.5 amps max
Weight 14.75 oz. (0.42 kg)
MTBF ≥300,000 hours (MIL-HDBK-217E)
Dimensions 4.5”H X 0.75”W X 9.5”D
Power Dissipation While the cooling of the Adapt-a-Switch carrier is dependent upon
the chassis into which it is installed, the carrier can normally
dissipate approximately 100 W. Care must be taken, then, in the
selection and loading of the plug-in modules used in the carrier. It is
not possible to fully load the carrier, energize every relay, and run
full power through every set of contacts, all at the same time. In
practice this situation would never occur.
To properly evaluate the power dissipation of the plug-in modules,
examine the path resistance, the current passing through the relay
contacts, the ambient temperature, and the number of relays
closed at any one time.
For example, if a 1260-132 module typically has two relays closed,
passing a current of 2.0A, then:
Total power dissipation =
[(current)2* (path resistance) * 2 ] + (quiescent power)
By substituting the actual values:
Total power dissipation =
[(2.0 A)2* (0.5 Ω) * 2] + ( 8.0 W) = 12 W at 55°C

1260-132 User Manual
Module Specification 1-4
This is acceptable power dissipation for an individual plug-in
module. If five additional modules are likewise loaded, then the
overall carrier dissipation is approximately 70 W, which is well
within the cooling available in any commercial VXIbus chassis or
the 1256 Switching System. In practice, rarely are more than two
relays are energized simultaneously, and rarely is full rated current
run through every path. In addition, the actual contact resistance is
typically one-half to one-fourth the specified maximum, and
temperatures are normally not at the rated maximum. The power
dissipated by each plug-in should be no more than 15 W if all six
slots are used simultaneously. Consult the Power Dissipation
Section of any other 1260 Adapt-a-Switch card manuals for
additional information.
Most users of a signal-type switch, such as the 1260-132, switch no
more than a few hundred milliamperes and are able to energize all
relays simultaneously, should they so desire.
Additionally, if fewer plug-in modules are used, more power may be
dissipated by the remaining cards. By using a chassis with high
cooling capacity, such as the Racal Instruments 1261B, almost any
configuration may be realized.
About MTBF The 1260-132 MTBF is >300,000 hours, calculated in accordance
with MIL-HDBK-217E. Relays are included in this calculation but be
aware that relay life is strongly dependent upon operating
conditions. Factors affecting relay life expectancy are:
1. Switched voltage
2. Switched current
3. Switched power
4. Maximum switching capacity
5. Maximum rated carrying current
6. Load type (resistive, inductive, capacitive)
7. Switching repetition rate
8. Ambient temperature
The most important factor is the maximum switching capacity,
which is an interrelationship of maximum switching power,
maximum switching voltage and maximum switching current.
When a relay operates at a lower percentage of its maximum
switching capacity, its life expectancy is longer. The maximum

1260-132 User Manual
Module Specification 1-5
switching capacity specification is based on a resistive load, and
must be further de-rated for inductive and capacitive loads.
For more details about the above life expectancy factors, refer to
the data sheet for the switch plug-in module.
The relays used on the 1260-132 plug-in are Racal P/N 310303.
The manufacturer’s specifications for this relay are:
Life Expectancy
Mechanical 100,000,000 operations
Electrical 1,000,000 operations at full rated load
(resistive)
For additional relay specifications, refer to the relay manufacturer’s
data sheet.
Ordering
Information Listed below are part numbers for the 1260-132 switch module and
available mating connector accessories. Each 1260-132 uses a
single 48 pin mating connector.
ITEM DESCRIPTION PART #
1260-132 1x23 Two Wire HV Mux Module 407822
Mating Connector Kit 48 Pin Connector Housing / Strain
Relief 407664-001
Spare Connector Pins Crimp Connector Pins 602258-900
Additional Manual 1260-132 Users Manual 980824-132

1260-132 User Manual
Module Specification 1-6
This page was left intentionally left blank.

1260-132 User Manual
Installation Instructions 2-1
Chapter 2
INSTALLATION INSTRUCTIONS
Unpacking and
Inspection 1.Before unpacking the switching module, check the exterior of
the shipping carton for any signs of damage. All irregularities
should be noted on the shipping bill and reported.
CAUTION
ESD sensitive devices, open the instrument at an
ESD safe work station.
WARNING
The 1260-132 card is a high-voltage switch card. This
card if improperly used could expose the user to
potentially lethal voltages. Make absolutely sure, that
all external high-voltage sources are off and locked-
out prior to inserting, removing, or servicing this
card in the chassis. The card retention screws
should be tightened to the chassis and all chassis
grounds should be verified with a ohmmeter prior to
the first use. Failure to observe these precautions
could result in either death or serious injury.
WARNING
Extreme care must be exercised when high-voltage /
high-current power sources are used. Make sure
that adequate external fault protection exists
between these sources and the 1260-132. Failure to
observe this precaution could result in fire or serious
damage to both the 1260-132 and chassis.
!
CAUTION
SENSITIVEELECTRONICDEVICES
DO NOT SHIP OR STORE NEAR
STRONGELECTROSTATIC,
ELECTROMAGNETIC,MAGNETICOR
RADIOACTIVEFIELDS

1260-132 User Manual
Installation Instructions 2-2
WARNING
The 1260-132 module should be periodically
inspected for dust accumulation and removed as
necessary to prevent internal arcing within the
module.
CAUTION
With reactive loads the 1260-132 module should be
switched with the high-voltage removed to eliminate
the possibility of contact welding.
2.Remove the instrument from its carton, preserving the factory
packaging as much as possible.
3.Inspect the switching module for any defects or damage.
Immediately notify the carrier if any damage is apparent.
4.Have a qualified person check the instrument for safety before
use.
Reshipment
Instructions 1.Use the original packing material when returning the switching
module to Racal Instruments for servicing. The original
shipping carton and the instrument’s plastic foam will provide
the necessary support for safe reshipment.
2.If the original packing material is unavailable, wrap the switching
module in an ESD Shielding bag and use plastic spray foam
to surround and protect the instrument.
3.Reship in either the original or a new shipping carton.
Installation Installation of the 1260-132 Switching Module into a 1260-100
Carrier assembly is described in the Installation section of the
1260-100 Adapt-a-Switch Carrier Manual and the 1256 Switch
System Manual.

1260-132 User Manual
Installation Instructions 2-3
Module
Configurations The 1260-132 is a 1 x 23, two wire,high voltage reed switch
multiplexer module The 1260-132 uses an isolation relay to
disconnect the 1x23 multiplexer when cascading multiple 1260-132
modules to build larger multiplexers . This additional relay reduces
the capacitance and increases the insulation resistance for large
multiplexer configurations
Front Panel
Connectors
The 1260-132 has a 48-pin front-panel connector, labeled J200. It is
a 48-pin, DIN style. See Figure 2-1 for pin numbering. Table 2-1
shows the mapping of channel numbers to connector pins.
Information about available mating connectors is provided
immediately after Table 2-1. See Figure 2-2 for a detail of the
actual relay diagram. See Figure 2-3 for a block diagram of the
1260-132.
Figure 2-1, Front-Panel Connector Pin Numbering
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
A
C
E

1260-132 User Manual
Installation Instructions 2-4
Table 2-1, 1260-132 Front-Panel Connections
CHANNEL HI LO RELAY
00 J200-E32 J200-E30 K1
01 J200-A28 J200-C28 K2
02 J200-A30 J200-C30 K3
03 J200-A32 J200-C32 K4
04 J200-E28 J200-E26 K5
05 J200-E24 J200-E22 K6
06 J200-A24 J200-C24 K7
07 J200-A26 J200-C26 K8
08 J200-E20 J200-E18 K9
09 J200-A18 J200-C18 K10
10 J200-A20 J200-C20 K11
11 J200-A22 J200-C22 K12
12 J200-E16 J200-E14 K13
13 J200-A12 J200-C12 K14
14 J200-A14 J200-C14 K15
15 J200-A16 J200-C16 K16
16 J200-E12 J200-E10 K17
17 J200-E8 J200-E6 K18
18 J200-A8 J200-C8 K19
19 J200-A10 J200-C10 K20
20 J200-E4 J200-E2 K21
21 J200-A2 J200-C2 K22
22 J200-A4 J200-C4 K23
23 J200-A6 J200-C6 K24