Racal Instruments 1260-112 User manual

RACAL INSTRUMENTS
1260-112
MULTIPLEXER PLUG-IN
PUBLICATION NO. 980824-112
EADS North America Defense Test and Services, Inc.
4 Goodyear, Irvine, CA 92618
Tel: [phone]; Fax: [phone]
[email protected]
[email protected]
[email protected]
http://www.eads-nadefense.com
PUBLICATION DATE: May 17, 2006
Copyright 2002 by EADS North America Defense Test and Services, 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 EADS NORTH AMERICA DEFENSE TEST AND
SERVICES PRODUCT
For this product, or any other EADS North America Defense Test and Services, Inc. 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.eads-nadefense.com/downloads
If you have any questions about software driver downloads or our privacy policy, please contact us at
[email protected]
WARRANTY STATEMENT
All EADS North America Defense Test and Services, Inc. products are designed and manufactured to
exacting standards and in full conformance to EADS ISO 9001:2000 processes.
This warranty does not apply to defects resulting from any modification(s) of any product or part without
EADS North America Defense Test and Services, Inc. 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 EADS North America Defense Test and Services, Inc. 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)
Fax: [phone] (USA)

RETURN of PRODUCT
Authorization is required from EADS North America Defense Test and Services, Inc. before you send us your
product for service or calibration. Call or contact the Customer Support Department 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 EADS North America Defense Test
and Services, Inc., and shall not, without express written permission of EADS North America Defense Test
and Services, Inc., be used, in whole or in part to solicit quotations from a competitive source or used for
manufacture by anyone other than EADS North America Defense Test and Services, Inc. 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 EADS North America Defense Test and
Services, Inc.
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. EADS North America Defense Test and Services, Inc. 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 EADS North America Defense Test and Services, Inc. product could create a situation where
personal injury or death could occur. Should Buyer purchase EADS North America Defense Test and
Services, Inc. product for such unintended application, Buyer shall indemnify and hold EADS North America
Defense Test and Services, Inc., 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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1260-112 User Manual
i
Table of Contents
Chapter 1.............................................................................................................................. 1-1
SPECIFICATIONS.......................................................................................................................... 1-1
Introduction.................................................................................................................................. 1-1
Specifications.............................................................................................................................. 1-1
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.............................................................................................................. 2-1
Installation................................................................................................................................... 2-2
Module Configuration .................................................................................................................. 2-2
Front Panel Connectors........................................................................................................... 2-2
Mating Connectors................................................................................................................... 2-8
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 1260-112 .................................................................................. 3-4
Reply To The MOD:LIST? Command...................................................................................... 3-5

1260-112 User Manual
ii
Operating The 1260-112 in Register-Based Mode.......................................................................3-5
Test Points................................................................................................................................3-8
1260-112 Example Code..........................................................................................................3-9
Chapter 4...............................................................................................................................4-1
DRAWINGS.....................................................................................................................................4-1
Chapter 5...............................................................................................................................5-1
PARTS LIST ....................................................................................................................................5-1
Chapter 6...............................................................................................................................6-1
OPTIONAL ASSEMBLIES...............................................................................................................6-1
Chapter 7...............................................................................................................................7-1
PRODUCT SUPPORT.....................................................................................................................7-1
Product Support ...........................................................................................................................7-1
Warranty.......................................................................................................................................7-1

1260-112 User Manual
iii
List of Figures
Figure 2-1, Front-Panel Connector Pin Numbering ........................................................................ 2-3
Figure 3-1, Message-Based Mode of Operation............................................................................. 3-3
Figure 3-2, Register-Based Mode of Operation.............................................................................. 3-3
List of Tables
Table 2-1, 1260-112 Front-Panel Connections............................................................................... 2-4
Table 3-1, Control Register Channel Assignments......................................................................... 3-7

1260-112 User Manual
iv
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1260-112 User Manual
EADS North America Defense Specifications 1-1
Test and Services, Inc. © 2002
Chapter 1
SPECIFICATIONS
Introduction The 1260-112 is a plug-in switch module developed for the Racal
Instruments 1260-100 Adapt-a-Switch Carrier. It switches 20 two-
wire channels of DPDT switches. Its switching current is 2 A at
220 VDC or 250 VAC. The 3 dB bandwidth is 100 MHz minimum.
The 1260-112 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.
Specifications Bandwidth (-3dB) > 120MHz
Insertion Loss
300 kHz < 0.5 dB
1 MHz < 0.5 dB
10 MHz < 0.5 dB
Isolation
300 kHz > 70 dB
1 MHz > 65 dB
10 MHz > 50 dB
Crosstalk
300 KHz < -75 dB
1 MHz < -70 dB
10 MHz < -45 dB
Switching Voltage
AC 250 V, Max
DC 220 V, Max

1260-112 User Manual
Specifications 1-2 EADS North America Defense
Test and Services, Inc. © 2002
Switching Current
AC 2 A, Max
DC 2 A, Max
Switching Power
AC 125 VA, Max
DC 60 W, Max
Path resistance < 250 MΩ
Thermal EMF < 50 uV
Capacitance
Channel-Chassis < 100 pF
Open-Channel < 50 pF
Insulation resistance > 109Ω
Relay Settling Time < 10 ms
Shock 30g, 11 ms, ½ sine wave
(MIL-T-28800E)
Vibration 0.013 in. P-P, 5-55 Hz
(MIL-T-28800E)
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 15 mA + 28 mA per energized relay
max.
Weight 13 oz. (0.45 kg.)
Mean Time Between >100,00 hours (MIL-HDBK-217E)
Failures (MTBF)
Mean Time to Repair < 5 minutes
(MTTR)

1260-112 User Manual
EADS North America Defense Specifications 1-3
Test and Services, Inc. © 2002
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 1260-112 module (containing 20 relays) has 20
relays closed, passing a current of 2 A, then:
Total power dissipation =
[(current)2* (path resistance) * 25 ] + (quiescent power)
By substituting the actual values:
Total power dissipation =
[(2 A)2* (0.5 Ω) * 20] + ( 0.75 W) = 41 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 200 W, which is outside
the cooling range available in most commercial VXIbus chassis. In
practice however, rarely are more than 25% of the module’s relays
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 50 W if all six
slots are used simultaneously and the 25% rule is used. This
yields the following guideline:
Most users of a signal-type switch, such as the 1260-112, switch
no more than a few hundred milliamperes and are able to energize
all relays simultaneously, should they so desire. The numbers in
the above table represent worst-case, elevated-temperature, end-
of-life conditions at maximum current.
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.

1260-112 User Manual
Specifications 1-4 EADS North America Defense
Test and Services, Inc. © 2002
About MTBF The 1260-112 MTBF is >100,000 hours, calculated in accordance
with MIL-HDBK-217E, with the exception of the electromechanical
relays. Relays are excluded from this calculation because 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
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 relay used on the 1260-112 plug-in is EADS part no.
310256-001. The relay manufacturer’s specifications for this relay
are:
Life Expectancy:
Mechanical 100,000 operations
Electrical 100,000 operations at full rated load
(resistive)
For additional relay specifications, refer to the relay manufacturer’s
data sheet.

1260-112 User Manual
EADS North America Defense Specifications 1-5
Test and Services, Inc. © 2002
Ordering
Information Listed below are part numbers for both the 1260-112 switch
module and available mating connector accessories. Each
1260-112 uses a single mating connector.
ITEM DESCRIPTION PART #
1260-112 Switch Module Switch Module, 20-Channel DPDT, 2 A
Consists of:
P/N 405151 PCB Assembly
P/N 980824-112 Manual
407696
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 980824-112

1260-112 User Manual
Specifications 1-6 EADS North America Defense
Test and Services, Inc. © 2002
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1260-112 User Manual
EADS North America Defense Installation Instructions 2-1
Test and Services, Inc. © 2002
Chapter 2
INSTALLATION INSTRUCTIONS
Unpacking and
Inspection 1. Remove the 1260-112 module and inspect it for damage. If any
damage is apparent, inform the carrier immediately. Retain
shipping carton and packing material for the carrier’s
inspection.
2. Verify that the pieces in the package you received contain the
correct 1260-112 module option and the 1260-112 Users
Manual. Notify EADS North America Defense Test and
Services, Inc. if the module appears damaged in any way. Do
not attempt to install a damaged module into a VXI chassis.
3. The 1260-112 module is shipped in an anti-static bag to
prevent electrostatic damage to the module. Do not remove the
module from the anti-static bag unless it is in a static-controlled
area.
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 EADS North America Defense Test and
Services, Inc. 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.

1260-112 User Manual
Installation Instructions 2-2 EADS North America Defense
Test and Services, Inc. © 2002
Installation Installation of the 1260-112 Switching Module into a 1260-100
Carrier assembly is described in the Installation section of the
1260-100 Adapt-a-Switch Carrier Manual.
Module
Configuration The 1260-112 is a 20-channel, two-wire plug-in for the Adapt-a-
Switch Series. Its relay architecture permits it to be organized via
software into any configuration from twenty DPDTs to one 20PDT,
or any combination in between. These configurations are
equivalent to 2-wire, 4-wire, … n-wire switches. The software
command Include provides this flexibility without the use of
hardware jumpers.
For connector pin assignments, refer to Figure 2-1.
Front Panel
Connectors
The 1260-112 has one 160-pin 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 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.

1260-112 User Manual
EADS North America Defense Installation Instructions 2-3
Test and Services, Inc. © 2002
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

1260-112 User Manual
Installation Instructions 2-4 EADS North America Defense
Test and Services, Inc. © 2002
Table 2-1, 1260-112 Front-Panel Connections
Channel Connector Pin
COM 0H J200 P28B
0000H NC J200 P29B
0000H NO J200 P27B
COM 0L J200 P28A
0000L NC J200 P29A
0000L NO J200 P27A
COM 1H J200 P31B
0001H NC J200 P32B
0001H NO J200 P30B
COM 1L J200 P31A
0001L NC J200 P32A
0001L NO J200 P30A
COM 2H J200 P28E
0002H NC J200 P29E
0002H NO J200 P27E
COM 2L J200 P28D
0002L NC J200 P29D
0002L NO J200 P27D
COM 3H J200 P31E
0003H NC J200 P32E
0003H NO J200 P30E
COM 3L J200 P31D
0003L NC J200 P32D
0003L NO J200 P30D
COM 4H J200 P22B
0004H NC J200 P23B
0004H NO J200 P21B
COM 4L J200 P22A
0004L NC J200 P23A
0004L NO J200 P21A
COM 5H J200 P25B
0005H NC J200 P26B
0005H NO J200 P24B
COM 5L J200 P25A
0005L NC J200 P26A
0005L NO J200 P24A
COM 6H J200 P22E
0006H NC J200 P23E
0006H NO J200 P21E
COM 6 J200 P22D