Racal Instruments 1260 VXI User manual

1260 VXI
SWITCHING CARD
1260-145
MULTIPLEXER PLUG-IN
PUBLICATION NO. 980824-145
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)
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Tel: [phone]; Fax: [phone]
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Tel: [phone]; Fax: [phone]
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Tel: [phone]; Fax: [phone]
Technologie Park, Friedrich Ebert Strasse, 51429 Bergisch Gladbach, Germany
Tel: [phone]; Fax: [phone]
[email protected]
[email protected]
[email protected]
http://www.racalinstruments.com/
PUBLICATION DATE: November 03, 2003
Copyright 2001 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.

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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.

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1260-145 User Manual
i
Table of Contents
Chapter 1 ........................................................................................................................1-1
SPECIFICATIONS.....................................................................................................................1-1
Introduction – 1260-145A (9 – 4x4’s) .........................................................................................1-1
Electrical Specifications – 1260-145A ........................................................................................1-2
Mechanical Specifications – 1260-145A ....................................................................................1-3
Power Dissipation – 1260-145A .................................................................................................1-3
Introduction – 1260-145B (3 – 4x12’s) .......................................................................................1-4
Electrical Specifications – 1260-145B ........................................................................................1-5
Mechanical Specifications – 1260-145B ....................................................................................1-6
Power Dissipation – 1260-145B .................................................................................................1-6
Introduction – 1260-145C (2 – 4x16’s) .......................................................................................1-7
Electrical Specifications – 1260-145C........................................................................................1-8
Mechanical Specifications – 1260-145C ....................................................................................1-9
Power Dissipation – 1260-145C.................................................................................................1-9
Introduction – 1260-145D (1 – 4x36)........................................................................................1-10
Electrical Specifications – 1260-145D......................................................................................1-11
Mechanical Specifications – 1260-145D ..................................................................................1-12
Power Dissipation – 1260-145D...............................................................................................1-12
Introduction – 1260-145E (2 – 8x8’s) .......................................................................................1-13
Electrical Specifications – 1260-145E ......................................................................................1-14
Mechanical Specifications – 1260-145E ..................................................................................1-15
Power Dissipation – 1260-145E ...............................................................................................1-15
Introduction – 1260-145F (1 – 8x16) ........................................................................................1-16
Electrical Specifications – 1260-145F ......................................................................................1-17
Mechanical Specifications – 1260-145F................................................................................... 1-18
Power Dissipation – 1260-145F ...............................................................................................1-18
Introduction – 1260-145G (1 – 12x12) .....................................................................................1-19
Electrical Specifications – 1260-145G...................................................................................... 1-20
Mechanical Specifications – 1260-145G ..................................................................................1-21
Power Dissipation – 1260-145G...............................................................................................1-21
About MTBF .............................................................................................................................1-23

1260-145 User Manual
ii
Ordering Information ................................................................................................................1-23
Chapter 2......................................................................................................................... 2-1
INSTALLATION INSTRUCTIONS ............................................................................................. 2-1
Unpacking and Inspection.......................................................................................................... 2-1
Reshipment Instructions............................................................................................................. 2-1
Installation .................................................................................................................................. 2-2
Module Configuration ................................................................................................................. 2-2
Front Panel Connectors ............................................................................................................. 2-2
Mating Connectors .....................................................................................................................2-3
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 1260-145 ................................................................................. 3-4
Reply To The MOD:LIST? Command..................................................................................... 3-5
Operating The 1260-145 in Register-Based Mode..................................................................... 3-6
1260-145 Example Code......................................................................................................3-17
Chapter 4......................................................................................................................... 4-1
OPTIONAL ASSEMBLIES.........................................................................................................4-1
Chapter 5.........................................................................................................................5-1
Product Support ......................................................................................................................... 5-1
Reshipment Instructions............................................................................................................. 5-1
Support Offices .......................................................................................................................... 5-2
Repair and Calibration Request Form........................................................................................ 5-3

1260-145 User Manual
iii
List of Figures
Figure 1-1, The 1260-145 Series ...................................................................................................1-1
Figure 2-1, Front-Panel Connector Pin Numbering .......................................................................2-2
Figure 2-2, 1260-145 Block Diagram .............................................................................................2-3
Figure 3-1, Message-Based Mode of Operation............................................................................3-3
Figure 3-2, Register-Based Mode of Operation .............................................................................3-3
Figure 3-4, Message-Based Channel Descriptor to Physical Switch Orientation ..........................3-9
Figure 3-5, 1260-145A Connector/Channel Organization............................................................3-10
Figure 3-6, 1260-145B Connector/Channel Organization............................................................3-11
Figure 3-7, 1260-145C Connector/Channel Organization ...........................................................3-12
Figure 3-8, 1260-145D Connector/Channel Organization ...........................................................3-13
Figure 3-9, 1260-145E Connector/Channel Organization............................................................3-14
Figure 3-10, 1260-145F Connector/Channel Organization..........................................................3-15
Figure 3-11, 1260-145G Connector/Channel Organization .........................................................3-16

1260-145 User Manual
iv
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1260-145 User Manual
Racal Instruments 2003 Module Specification 1-1
Chapter 1
SPECIFICATIONS
Introduction –
1260-145A
(9 – 4x4’s)
The 1260-145A is a plug-in matrix switch module developed for the
Racal Instruments 1260-100 Adapt-a-Switch Carrier. This switch
provides nine independent 4x4 matrices with a maximum switching
voltage of 125VAC @ 0.3A or 30 VDC @ 1A.
The 1260-145A includes the following features:
• Standard Adapt-a-Switchplug-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 1260-145 Series

1260-145 User Manual
Module Specification 1-2 Racal Instruments 2003
Electrical
Specifications –
1260-145A
Chan. Input Voltage 60 VDC / 125 VAC maximum
Chan. Output Current 1 A maximum
Chan. Output Power 30 W / 37.5 VA maximum
Path Resistance < 1.8 Ohms (HI + LOW path)
Contact Bounce Time 3 ms maximum
Contact Thermal EMF 4 µV maximum
Switch Contact Lifetime 50 Million Cycles (low-level)
100,000 Cycles (maximum rating)
Available I/O Channels 144 (dual wire)
Capacitance
A (HI) to B (LOW) 120 pF maximum
Chan. to Chassis 415 pF maximum
Bandwidth 42 MHz (-3 dB) minimum
(Worst Path Performance;
Typical Unit)
Insertion Loss 1.0 dB @ 10 MHz maximum
(Worst Path Performance; 0.2 dB @ 1 MHz maximum
Typical Unit) 0.1 dB @ 300 kHz maximum
Isolation 15 dB @ 42 MHz minimum
(Worst Path Performance; 43 dB @ 10 MHz minimum
Typical Unit) 62 dB @ 1 MHz minimum
76 dB @ 300 kHz minimum
Crosstalk -9 dB @ 42 MHz maximum
(Worst Path Performance; -49 dB @ 10 MHz maximum
Typical Unit) -69 dB @ 1 MHz maximum
-81 dB @ 300 kHz maximum
Power Requirements +5 VDC
quiescent 0.1 A maximum
each relay closure 0.02 A maximum
Mean Time Between 33,784 Hours (MIL-HDBK-217FN2)
Failures (MTBF) 50,714 Hours (Telcordia / Bellcore 6)
Mean Time to Repair < 5 minutes (MTTR)

1260-145 User Manual
Racal Instruments 2003 Module Specification 1-3
Mechanical
Specifications –
1260-145A
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
Weight 9 oz. (0.32 kg.)
Power
Dissipation –
1260-145A
The cooling of the Adapt-a-Switch carrier is dependent upon the
chassis into which it is installed. The carrier can nominally
dissipate approximately 100W. Even with all channels driven to
maximum outputs, up to six 1260-145A plug-ins may be used
together in a 1260-100 without exceeding the maximum allowable
power dissipation of the carrier.
If the 1260-145A will be used in conjunction with other cards, the
dissipation should be computed and summed with the total worst-
case dissipation of the remaining modules.
For example, a 1260-145A module would dissipate the following
energy:
Quiescent power dissipation = 0.5W maximum
Channel dissipation =
[(# channels energized) * (relay coil dissipation)]
Total Power Dissipation = Quiescent + Channel
Assuming all relays on the card are enabled (worse-case situation)
the channel path resistances will be in parallel and therefore
insignificant as a source of heat. The largest contributor of thermal
energy will therefore derive from the relay coils.
Total power dissipation = [(144) * (0.100)] + [0.5] = 15W

1260-145 User Manual
Module Specification 1-4 Racal Instruments 2003
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 90W, which is within the
cooling available in most commercial VXIbus chassis. Apart from
the thermal issues, however, it is important to remember that a
fully enabled 1260-145A card would draw over 3A of current from
the +5V supply. If this is multiplied by six for the remaining slots, a
load of 18A would burden the +5V supply, exceeding the
specifications for the 1260-100 carrier. In reality, the worse-case
situation is not likely, since the 1260-145A is a matrix switch where
typically only one relay is engaged at a time and the power
dissipation falls considerably below that calculated in the example
above. For practical purposes, as the calculations can illustrate for
normal operation, the 1260-145A contributes a negligible amount
of thermal load on a chassis.
Introduction –
1260-145B
(3 – 4x12’s)
The 1260-145B is a plug-in matrix switch module developed for the
Racal Instruments 1260-100 Adapt-a-Switch Carrier. This switch
provides three independent 4x12 matrices with a maximum
switching voltage of 125VAC @ 0.3A or 30 VDC @ 1A.
The 1260-145B includes the following features:
• Standard Adapt-a-Switchplug-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.

1260-145 User Manual
Racal Instruments 2003 Module Specification 1-5
Electrical
Specifications –
1260-145B
Chan. Input Voltage 60 VDC / 125 VAC maximum
Chan. Output Current 1 A maximum
Chan. Output Power 30 W / 37.5 VA maximum
Path Resistance < 1.4 Ohms (HI + LOW path)
Contact Bounce Time 3 ms maximum
Contact Thermal EMF 4 µV maximum
Switch Contact Lifetime 50 Million Cycles (low-level)
100,000 Cycles (maximum rating)
Available I/O Channels 144 (dual wire)
Capacitance
A (HI) to B (LOW) 135 pF maximum
Chan. to Chassis 500 pF maximum
Bandwidth 31 MHz (-3 dB) minimum
(Worst Path Performance;
Typical Unit)
Insertion Loss 0.5 dB @ 10 MHz maximum
(Worst Path Performance; 0.1 dB @ 1 MHz maximum
Typical Unit) 0.1 dB @ 300 kHz maximum
Isolation 22 dB @ 31 MHz minimum
(Worst Path Performance; 52 dB @ 10 MHz minimum
Typical Unit) 68 dB @ 1 MHz minimum
75 dB @ 300 kHz minimum
Crosstalk -16 dB @ 31 MHz maximum
(Worst Path Performance; -49 dB @ 10 MHz maximum
Typical Unit) -70 dB @ 1 MHz maximum
-72 dB @ 300 kHz maximum
Power Requirements +5 VDC
quiescent 0.1 A maximum
each relay closure 0.02 A maximum
Mean Time Between 33,773 Hours (MIL-HDBK-217FN2)
Failures (MTBF) 50,687 Hours (Telcordia / Bellcore 6)
Mean Time to Repair < 5 minutes (MTTR)

1260-145 User Manual
Module Specification 1-6 Racal Instruments 2003
Mechanical
Specifications –
1260-145B
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
Weight 9 oz. (0.32 kg.)
Power
Dissipation –
1260-145B
The cooling of the Adapt-a-Switch carrier is dependent upon the
chassis into which it is installed. The carrier can nominally
dissipate approximately 100W. Even with all channels driven to
maximum outputs, up to six 1260-145B plug-ins may be used
together in a 1260-100 without exceeding the maximum allowable
power dissipation of the carrier.
If the 1260-145B will be used in conjunction with other cards, the
dissipation should be computed and summed with the total worst-
case dissipation of the remaining modules.
For example, a 1260-145B module would dissipate the following
energy:
Quiescent power dissipation = 0.5W maximum
Channel dissipation =
[(# channels energized) * (relay coil dissipation)]
Total Power Dissipation = Quiescent + Channel
Assuming all relays on the card are enabled (worse-case situation)
the channel path resistances will be in parallel and therefore
insignificant as a source of heat. The largest contributor of thermal
energy will therefore derive from the relay coils.
Total power dissipation = [(144) * (0.100)] + [0.5] = 15W
This is acceptable power dissipation for an individual plug-in

1260-145 User Manual
Racal Instruments 2003 Module Specification 1-7
module. If five additional modules are likewise loaded, then the
overall carrier dissipation is approximately 90W, which is within the
cooling available in most commercial VXIbus chassis. Apart from
the thermal issues, however, it is important to remember that a
fully enabled 1260-145B card would draw over 3A of current from
the +5V supply. If this is multiplied by six for the remaining slots, a
load of 18A would burden the +5V supply, exceeding the
specifications for the 1260-100 carrier. In reality, the worse-case
situation is not likely, since the 1260-145B is a matrix switch where
typically only one relay is engaged at a time and the power
dissipation falls considerably below that calculated in the example
above. For practical purposes, as the calculations can illustrate for
normal operation, the 1260-145B contributes a negligible amount
of thermal load on a chassis.
Introduction –
1260-145C
(2 – 4x16’s)
The 1260-145C is a plug-in matrix switch module developed for the
Racal Instruments 1260-100 Adapt-a-Switch Carrier. This switch
provides two independent 4x16 matrices with a maximum
switching voltage of 125VAC @ 0.3A or 30 VDC @ 1A.
The 1260-145C includes the following features:
• Standard Adapt-a-Switchplug-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.

1260-145 User Manual
Module Specification 1-8 Racal Instruments 2003
Electrical
Specifications –
1260-145C
Chan. Input Voltage 60 VDC / 125 VAC maximum
Chan. Output Current 1 A maximum
Chan. Output Power 30 W / 37.5 VA maximum
Path Resistance < 1.6 Ohms (HI + LOW path)
Contact Bounce Time 3 ms maximum
Contact Thermal EMF 4 µV maximum
Switch Contact Lifetime 50 Million Cycles (low-level)
100,000 Cycles (maximum rating)
Available I/O Channels 128 (dual wire)
Capacitance
A (HI) to B (LOW) 175 pF maximum
Chan. to Chassis 640 pF maximum
Bandwidth 24 MHz (-3 dB) minimum
(Worst Path Performance;
Typical Unit)
Insertion Loss 0.8 dB @ 10 MHz maximum
(Worst Path Performance; 0.1 dB @ 1 MHz maximum
Typical Unit) 0.1 dB @ 300 kHz maximum
Isolation 37 dB @ 24 MHz minimum
(Worst Path Performance; 48 dB @ 10 MHz minimum
Typical Unit) 67 dB @ 1 MHz minimum
77 dB @ 300 kHz minimum
Crosstalk -19 dB @ 24 MHz maximum
(Worst Path Performance; -46 dB @ 10 MHz maximum
Typical Unit) -59 dB @ 1 MHz maximum
-63 dB @ 300 kHz maximum
Power Requirements +5 VDC
quiescent 0.1 A maximum
each relay closure 0.02 A maximum
Mean Time Between 37,908 Hours (MIL-HDBK-217FN2)
Failures (MTBF) 56,705 Hours (Telcordia / Bellcore 6)
Mean Time to Repair < 5 minutes (MTTR)

1260-145 User Manual
Racal Instruments 2003 Module Specification 1-9
Mechanical
Specifications –
1260-145C
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
Weight 9 oz. (0.32 kg.)
Power
Dissipation –
1260-145C
The cooling of the Adapt-a-Switch carrier is dependent upon the
chassis into which it is installed. The carrier can nominally
dissipate approximately 100W. Even with all channels driven to
maximum outputs, up to six 1260-145C plug-ins may be used
together in a 1260-100 without exceeding the maximum allowable
power dissipation of the carrier.
If the 1260-145C will be used in conjunction with other cards, the
dissipation should be computed and summed with the total worst-
case dissipation of the remaining modules.
For example, a 1260-145C module would dissipate the following
energy:
Quiescent power dissipation = 0.5W maximum
Channel dissipation =
[(# channels energized) * (relay coil dissipation)]
Total Power Dissipation = Quiescent + Channel
Assuming all relays on the card are enabled (worse-case situation)
the channel path resistances will be in parallel and therefore
insignificant as a source of heat. The largest contributor of thermal
energy will therefore derive from the relay coils.
Total power dissipation = [(128) * (0.100)] + [0.5] = 13.3W
This is acceptable power dissipation for an individual plug-in

1260-145 User Manual
Module Specification 1-10 Racal Instruments 2003
module. If five additional modules are likewise loaded, then the
overall carrier dissipation is approximately 80W, which is within the
cooling available in most commercial VXIbus chassis. Apart from
the thermal issues, however, it is important to remember that a
fully enabled 1260-145C card would draw over 2.7A of current
from the +5V supply. If this is multiplied by six for the remaining
slots, a load of 16A would burden the +5V supply, exceeding the
specifications for the 1260-100 carrier. In reality, the worse-case
situation is not likely, since the 1260-145C is a matrix switch where
typically only one relay is engaged at a time and the power
dissipation falls considerably below that calculated in the example
above. For practical purposes, as the calculations can illustrate for
normal operation, the 1260-145C contributes a negligible amount
of thermal load on a chassis.
Introduction –
1260-145D
(1 – 4x36)
The 1260-145D is a plug-in matrix switch module developed for the
Racal Instruments 1260-100 Adapt-a-Switch Carrier. This switch
provides a 4x36 matrix with a maximum switching voltage of
125VAC @ 0.3A or 30 VDC @ 1A.
The 1260-145D includes the following features:
• Standard Adapt-a-Switchplug-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.