Racal Instruments 1260 VXI User manual

1260 VXI
SWITCHING CARD
1260-115
MULTIPLEXER PLUG-IN
PUBLICATION NO. 980824-115
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]
29-31 Cobham Road, Wimborne, Dorset BH21 7PF, United Kingdom
Tel: [phone]; Fax: [phone]
Via Milazzo 25, 20092 Cinisello B, Milan, Italy
Tel: [phone]; Fax: [phone]
Technologie Park, Friedrich Ebert Strasse, 51429 Bergisch Gladbach, Germany
Tel: [phone]; Fax: [phone]
[e-mail]
[email protected]
[e-mail]
http://www.racalinstruments.com/
PUBLICATION DATE: February 19, 2004
Copyright 2004 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 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: [e-mail]
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:
[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. 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 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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1260-115A/B User Manual
i
Table of Contents
Chapter 1.....................................................................................................................................1-1
SPECIFICATIONS .......................................................................................................................1-1
Introduction – Standard Open-Collector Version ......................................................................1-1
Specifications – Standard Open Collector ................................................................................1-2
Power Dissipation – Standard Open-Collector..........................................................................1-2
Introduction – High Current/Voltage Open-Collector Version....................................................1-3
Specifications – High Current/Voltage Open-Collector .............................................................1-4
Power Dissipation – High Current/Voltage Open-Collector.......................................................1-5
About MTBF .............................................................................................................................1-6
Ordering Information ................................................................................................................1-7
Chapter 2.....................................................................................................................................2-1
INSTALLATION INSTRUCTIONS................................................................................................2-1
Unpacking and Inspection ........................................................................................................2-1
Reshipment Instructions...........................................................................................................2-1
Installation ................................................................................................................................2-1
Module Configuration ...............................................................................................................2-2
Front Panel Connectors ........................................................................................................2-2
Mating Connectors................................................................................................................2-5
Chapter 3.....................................................................................................................................3-1
MODULE OPERATION................................................................................................................3-1
Setting the Module Address .....................................................................................................3-1
Operating Modes......................................................................................................................3-2
Operating In Message-Based Mode .........................................................................................3-4
Channel Descriptors for the 1260-115A/B.............................................................................3-4
Reply To the MOD:LIST? Command ....................................................................................3-5
Operating the 1260-115A/B in Register-Based Mode...............................................................3-5
1260-115 Example Code ....................................................................................................3-10
Chapter 4.....................................................................................................................................4-1
OPTIONAL ASSEMBLIES ...........................................................................................................4-1
Chapter 5.....................................................................................................................................4-3
Product Support .......................................................................................................................5-1
Reshipment Instructions...........................................................................................................5-1
Support Offices ........................................................................................................................5-2

1260-115A/B User Manual
ii
List of Figures
Figure 1-1, The 1260-115A..........................................................................................................1-1
Figure 1-2, The 1260-115B..........................................................................................................1-4
Figure 2-1, Front-Panel Connector Pin Numbering ......................................................................2-3
Figure 2-2, Block Diagram ...........................................................................................................2-5
Figure 3-1, Front View – Module Addresses for 1 through 6........................................................3-1
Figure 3-2, Front View – Module Addresses for 7 through 12......................................................3-2
Figure 3-3, Message-Based Mode of Operation ..........................................................................3-3
Figure 3-4, Register-Based Mode of Operation ...........................................................................3-3
List of Tables
Table 2-1, 1260-115A/B Front-Panel Connections.......................................................................2-4
Table 3-1, Register Offset Addresses of the 1260-115A/B Module..............................................3-7
Table 3-2, ID Register Functionality of the 1260-115A/B .............................................................3-7
Table 3-3, Ports A-F Register Functionality of the 1260-115A/B Module .....................................3-8
Table 3-4, Ports G-L Register Functionality of the 1260-115A/B Module .....................................3-8
Table 3-5, EPROM Descriptor Functionality ................................................................................3-9

1260-115A/B User Manual
Racal Instruments Ó2004 Specifications 1-1
Chapter 1
SPECIFICATIONS
Introduction –
Standard Open-
Collector Version
The 1260-115A is a plug-in switch module developed for the Racal
Instruments 1260-100 Adapt-a-Switch Carrier. It switches 96 open-
collector channels at 200 mA per channel. The 1260-115A
includes the following features:
· Standard Adapt-a-SwitchÔplug-in design, providing for ease
of replacement
· Data-Driven embedded descriptor, allowing immediate use with
any Option-01T switch controller, regardless of firmware
revision level.
Figure 1-1, The 1260-115A

1260-115A/B User Manual
Specifications 1-2 Racal Instruments Ó2004
Specifications –
Standard Open
Collector
Max. Chan. Input Voltage 32 VDC
Chan. Output Current 200 mA maximum
High Output Voltage 5 £Voh £32 VDC
Max. Low Output Voltage £1.5 VDC @ 200 mA
Available I/O Channels 96 open-collector channels
Shock 30g, 11 ms, ½ sine wave
Vibration 0.013 in. P-P, 5-55 Hz
Bench Handling 4 in., 45°
Cooling See 1260-100 cooling data
Temperature
Operating 0°C to +55°C
Non-operating -40°C to +75°C
Relative Humidity 85% + 5% non-condensing at
< 30°C
Altitude
Operating 10,000 feet
Non-operating 15,000 feet
Power Requirements
+5 VDC 0.5 A maximum
Weight 6 oz. (0.21 kg.)
Mean Time Between >100,000 hours (MIL-HDBK-217E)
Failures (MTBF)
Mean Time to Repair < 5 minutes (MTTR)
Power
Dissipation –
Standard Open-
Collector
The cooling of the Adapt-a-Switch carrier is dependent upon the
chassis into which it is installed. The carrier can nominally
dissipate approximately 100 W. Even with all channels driven to
maximum outputs, up to six 1260-115A plug-ins may be used
together in a 1260-100 without exceeding the maximum allowable
power dissipation of the carrier.
If the 1260-115A will be used in conjunction with other cards, the
1260-115A dissipation should be computed and summed with the

1260-115A/B User Manual
Racal Instruments Ó2004 Specifications 1-3
total worst-case dissipation of the remaining modules.
For example, a 1260-115A module would dissipate the following
energy:
Quiescent power dissipation = 0.75W maximum
Channel dissipation =
[(Vol) * current * 96(# channels energized)] +
[(current)2* (path resistance) * 96(# channels energized)]
Total Power Dissipation = Quiescent + Channel
Assuming all 96 channels are sinking a maximum current
of 200 mA and a path resistance of 0.5 W:
Total power dissipation =
[(1.5) * 0.200 A * 96] + [(0.200 A)2* (0.5 W) * 96]
+ ( 0.75 W) = 31.5 W at 55°C
This exceeds the acceptable power dissipation for an individual
plug-in module. If five additional modules are likewise loaded, then
the overall carrier dissipation is approximately 188 W, which is
above the typical cooling capabilities of the carrier and most
chassises in a two slot configuration. Therefore using a fully
loaded Adapt-a-Switch carrier with these cards operating at the
maximum extreme is not permissible. In practice, however, rarely
are more than 25% of the module’s channels energized
simultaneously, and rarely is full rated current run through every
path. In addition, temperatures are typically not run at the rated
maximum. Using the 25% rule, the power dissipated by each plug-
in should be no more than 8 W. If all six slots are used
simultaneously, this would amount to a total dissipation of
48Watts.
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.
Introduction –
High
Current/Voltage
Open-Collector
Version
The 1260-115B is a plug-in switch module developed for the Racal
Instruments 1260-100 Adapt-a-Switch Carrier. It switches 48 open-
collector channels at 50V and 1.5 A per channel. The 1260-115B
includes the following features:
· Standard Adapt-a-SwitchÔplug-in design, providing for ease
of replacement
· Data-Driven embedded descriptor, allowing immediate use with

1260-115A/B User Manual
Specifications 1-4 Racal Instruments Ó2004
any Option-01T switch controller, regardless of firmware
revision level.
Figure 1-2, The 1260-115B
Specifications –
High
Current/Voltage
Open-Collector
Max. Chan. Input Voltage 50 VDC
Chan. Output Current 1.5 A maximum
High Output Voltage 2 £Voh £50 VDC
Max. Low Output Voltage £0.5 VDC @ 1.5 A
Available I/O Channels 48 open-collector channels
Shock 30g, 11 ms, ½ sine wave
Vibration 0.013 in. P-P, 5-55 Hz
Bench Handling 4 in., 45°
Cooling See 1260-100 cooling data

1260-115A/B User Manual
Racal Instruments Ó2004 Specifications 1-5
Temperature
Operating 0°C to +55°C
Non-operating -40°C to +75°C
Relative Humidity 85% + 5% non-condensing at
< 30°C
Altitude
Operating 10,000 feet
Non-operating 15,000 feet
Power Requirements
+5 VDC 0.5 A maximum
Weight 6 oz. (0.21 kg.)
Mean Time Between >100,000 hours (MIL-HDBK-217E)
Failures (MTBF)
Mean Time to Repair < 5 minutes (MTTR)
Power
Dissipation –
High
Current/Voltage
Open-Collector
The cooling of the Adapt-a-Switch carrier is dependent upon the
chassis into which it is installed. The carrier can nominally
dissipate approximately 100 W. Even with all channels driven to
maximum outputs, up to six 1260-115B plug-ins may be used
together in a 1260-100 without exceeding the maximum allowable
power dissipation of the carrier.
If the 1260-115B will be used in conjunction with other cards, the
1260-115B dissipation should be computed and summed with the
total worst-case dissipation of the remaining modules.
For example, a 1260-115B module would dissipate the following
energy:
Quiescent power dissipation = 0.75W maximum
Channel dissipation =
[(Rds) * (current)2* 48(# channels energized)] +
[(current)2* (path resistance) * 48(# channels energized)]
Total Power Dissipation = Quiescent + Channel
Assuming all 48 channels are sinking a maximum current
of 1.5 A and a path resistance of 0.030 W:
Total power dissipation =

1260-115A/B User Manual
Specifications 1-6 Racal Instruments Ó2004
[(1.5 A)2* (0.060 W) * 48]+ [(1.5 A)2* (0.070 W) * 48]
+ ( 0.75 W) = 15 W at 55°C
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 89 W, which is well
within the cooling available in most commercial VXIbus chassis. In
practice, rarely are more than 25% of the module’s channels
energized simultaneously, and rarely is full rated current run
through every path. Using the 25% rule, the power dissipated by
each plug-in should be no more than 3.75 W. If all six slots are
used simultaneously, this would amount to a total dissipation of
about 23Watts.
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 1260-115 MTBF is 783,668 hours, calculated in accordance
with MIL-HDBK-217E.

1260-115A/B User Manual
Racal Instruments Ó2004 Specifications 1-7
Ordering
Information
Listed below are part numbers for both the 1260-115A/B switch
module and available mating connector accessories. Each 1260-
115 uses a single mating connector.
ITEM DESCRIPTION PART #
1260-115A Switch Module Switch Module, 96-Channel Standard
Open-Collector Output
Consists of:
P/N 405145-003 PCB Assy
P/N 980824-115 Manual
407924-001
1260-115B Switch Module Switch Module, 48-Channel High
Current/Voltage Open-Collector Output
Consists of:
P/N 405145-004 PCB Assy
P/N 980824-115 Manual
407924-002
160-pin Mating Connector 160 Pin Conn. Kit with pins 407664
Cable Assy. 6ft, Sleeved 160 Pin Cable Assy, 6 Ft, 24 AWG 407408-001
Connector Bracket Bracket, Strain Relief 456673
Additional Manual 980824-115

1260-115A/B User Manual
Specifications 1-8 Racal Instruments Ó2004
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1260-115A/B User Manual
Racal Instruments Ó2004 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.
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.
CAUTION
ESD sensitive devices, open the instrument at an ESD
safe work station.
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 1260-115A/B Switching Module into a 1260-100
Carrier assembly is described in the Installation section of the
1260-100 Adapt-a-Switch Carrier Manual.
C A U T I O N
SENSITIVE ELECTRONIC DEVICES
DO NOT SHIP OR STORE NEAR
STRONG ELECTROSTATIC,
ELECTROMAGNETIC, MAGNETIC OR
RADIOACTIVE FIELDS

1260-115A/B User Manual
Installation Instructions 2-2 Racal Instruments Ó2004
Module
Configuration
The 1260-115A is a 96-channel standard relay driver. The 1260-
115B is a 48 channel high-current relay driver.
Front Panel
Connectors
The 1260-115A/B has one front-panel connector, labeled J200. It
is a 160-pin, modified DIN style, with 0.025” square posts as pins.
It has one pin for each input and one for each output. See
Figure 2-1 for 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.

1260-115A/B User Manual
Racal Instruments Ó2004 Installation Instructions 2-3
Figure 2-1, Front-Panel Connector Pin Numbering
a b c d e
31
30
29
28
27
26
25
24
23
22
21
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
20
32

1260-115A/B User Manual
Installation Instructions 2-4 Racal Instruments Ó2004
Table 2-1, 1260-115A/B Front-Panel Connections
Channel Pin Mapping
Row A Row B Row C Row D Row E
Pin
#
Port (Channel #) Port (Channel #) Port (Channel #)
1 Port A (100) Port C (300) Port E (500) Flyback A Flyback B
2 Port A (101) Port C (301) Port E (501) GND GND
3 Port A (102) Port C (302) Port E (502) GND GND
4 Port A (103) Port C (303) Port E (503) GND GND
5 Port A (104) Port C (304) Port E (504) Flyback C Flyback D
6 Port A (105) Port C (305) Port E (505) GND GND
7 Port A (106) Port C (306) Port E (506) GND GND
8 Port A (107) Port C (307) Port E (507) GND GND
9 Port B (200) Port D (400) Port F (600) Flyback E Flyback F
10 Port B (201) Port D (401) Port F (601) GND GND
11 Port B (202) Port D (402) Port F (602) GND GND
12 Port B (203) Port D (403) Port F (603) GND GND
13 Port B (204) Port D (404) Port F (604) Flyback G‡Flyback H‡
14 Port B (205) Port D (405) Port F (603) GND GND
15 Port B (206) Port D (406) Port F (606) GND GND
16 Port B (207) Port D (407) Port F (607) GND GND
17 Port G (700)†Port I (900)†Port K (1100)†Flyback I‡Flyback J‡
18 Port G (701)†Port I (901)†Port K (1101)†GND GND
19 Port G (702)†Port I (902)†Port K (1102)†GND GND
20 Port G (703)†Port I (903)†Port K (1103)†GND GND
21 Port G (704)†Port I (904)†Port K (1104)†Flyback K‡Flyback L‡
22 Port G (705)†Port I (905)†Port K (1105)†GND GND
23 Port G (706)†Port I (906)†Port K (1106)†GND GND
24 Port G (707)†Port I (907)†Port K (1107)†GND GND
25 Port H (800)†Port J (1000)†Port L (1200)†N/C N/C
26 Port H (801)†Port J (1001)†Port L (1201)†GND GND
27 Port H (802)†Port J (1002)†Port L (1202)†GND GND
28 Port H (803)†Port J (1003)†Port L (1203)†GND GND
29 Port H (804)†Port J (1004)†Port L (1204)†GND GND
30 Port H (805)†Port J (1005)†Port L (1205)†GND GND
31 Port H (806)†Port J (1006)†Port L (1206)†GND GND
32 Port H (807)†Port J (1007)†Port L (1207)†GND GND
† For the 1260-115B version these pins are unused and tied to ground.
‡ For the 1260-115B version these pins are unused and are not connected.