Racal Instruments 1260-100X X Series User manual

1260 VXI X-Series SWITCHING CARD
1x8 MULTIPLEXER PLUG-IN
MODEL 1260-X138
PUBLICATION NO. 980914-X138
RACAL INSTRUMENTS
United States
(Corporate Headquarters and Service Center)
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Tel: [phone]; Fax: [phone]
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(European Headquarters and Service Center)
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Tel: [phone]; Fax: [phone]
Racal Instruments Group Limited, Technologie Park, D-51429 Bergisch Gladbach, Germany
Tel: [phone]; Fax: [phone]
[email protected]
[email protected]
[email protected]
http://www.racalinstruments.com
[email protected]
www.racalinstruments.de
PUBLICATION DATE: December 21, 2005
Copyright 2005 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:
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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 9001:2000 processes.
This warranty does not apply to defects resulting from any modification(s) of any product or part without Racal
Instruments express written consent, or misuse of any product or part. The warranty also does not apply to
fuses, software, non-rechargeable batteries, damage from battery leakage, or problems arising from normal
wear, such as mechanical relay life, or failure to follow instructions.
This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of
merchantability or fitness for a particular use. The remedies provided herein are buyer’s sole and exclusive
remedies.
For the specific terms of your standard warranty, or optional extended warranty or service agreement, contact
your Racal customer service advisor. Please have the following information available to facilitate service.
1. Product serial number
2. Product model number
3. Your company and contact information
You may contact your customer service advisor by:
E-Mail: [email protected]
Telephone: [phone] (USA)
[phone] (UK)
Fax: [phone] (USA)
[phone] (UK)

RETURN of PRODUCT
Authorization is required from Racal Instruments before you send us your product for service or calibration.
Call your nearest Racal Instruments support facility. A list is located on the last page of this manual. If you are
unsure where to call, contact Racal Instruments, Inc. Customer Support Department in Irvine, California, USA
at 1-800-722-3262 or 1-949-859-8999 or via fax at 1-949-859-7139. We can be reached at:
[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. Racal Instruments products are not specifically designed, manufactured or intended to be used as
parts, assemblies or components in planning, construction, maintenance or operation of a nuclear facility, or
in life support or safety critical applications in which the failure of the Racal Instruments product could create
a situation where personal injury or death could occur. Should Buyer purchase Racal Instruments product for
such unintended application, Buyer shall indemnify and hold Racal Instruments, its officers, employees,
subsidiaries, affiliates and distributors harmless against all claims arising out of a claim for personal injury or
death associated with such unintended use.

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

1260-X138 User Manual
i
Table of Contents
Chapter 1.............................................................................................................................. 1-1
SPECIFICATIONS .......................................................................................................................... 1-1
Introduction.................................................................................................................................. 1-1
Specifications .............................................................................................................................. 1-3
Ordering Information ................................................................................................................... 1-6
Chapter 2.............................................................................................................................. 2-1
INSTALLATION INSTRUCTIONS................................................................................................... 2-1
Unpacking and Inspection ........................................................................................................... 2-1
Reshipment Instructions.............................................................................................................. 2-1
Installation ................................................................................................................................... 2-2
Module Configuration .................................................................................................................. 2-2
Configuration Relays ................................................................................................................... 2-8
Discharge Relays ........................................................................................................................ 2-8
Analog Bus Relays ...................................................................................................................... 2-8
Front Panel Connector .............................................................................................................. 2-10
Connector Pin Assignments ...................................................................................................... 2-11
Mating Connectors................................................................................................................. 2-14
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

1260-X138 User Manual
ii
Channel Descriptors For The 1260-X138.................................................................................3-4
Reply To The MOD:LIST? Command.......................................................................................3-5
Operating The 1260-X138 in Register-Based Mode ....................................................................3-5
Configuring Larger Multiplexers ...................................................................................................3-8
Creating Very Large Multiplexers With the Analog Bus ...............................................................3-9
1260-X138 Example Code......................................................................................................3-11
Chapter 4...............................................................................................................................4-1
PRODUCT SUPPORT.....................................................................................................................4-1
Product Support ...........................................................................................................................4-1
Reshipment Instructions...............................................................................................................4-1
Support Offices ............................................................................................................................4-2

1260-X138 User Manual
iii
List of Figures
Figure 1-1 The 1260-X138............................................................................................................. 1-2
Figure 2-1 Single Multiplexer Example (Channels 70 through 77) ................................................ 2-3
Figure 2-2 1260-X138 Block Diagram 1x8 High Side Groups 0, 1, 2, 3, 4, and 5 ......................... 2-6
Figure 2-3 1260-X138 1x8 Relay Groups 6 and 7 ......................................................................... 2-7
Figure 2-4 Front-Panel Connector Pin Numbering ........................................................................ 2-9
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 Relay Groups................................................................................................................. 2-4
Table 2-2 2x8 Formation Relays.................................................................................................... 2-5
Table 2-3 2x8 Formation Relays.................................................................................................... 2-5
Table 2-4 1x8 MUX Group Configuration Relays........................................................................... 2-8
Table 2-5 1260-X138 Front-Panel Connections for J200 ............................................................ 2-11
Table 3-1 Control Register Channel Assignments......................................................................... 3-7

1260-X138 User Manual
iv
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1260-X138 User Manual
Racal Instruments ©2005 Specifications 1-1
Chapter 1
SPECIFICATIONS
Introduction The 1260-X138 is a plug-in switch module developed for the Racal
Instruments 1260-100X X-series Adapt-a-Switch carrier. Please
note that 1260-X138 can be used in 1260-100X carrier only. The
X-series plug-in switch modules offer more than 3.3” longer space
for relays than the standard 1260-100 carrier modules.
In addition, the 1260-X138 includes the following features:
•X-series Adapt-a-Switch plug-in design, providing for ease of
replacement.
•Functionally compatible with the 1260-100X X-series Adapt-a-
Switch carrier.
•Data-driven embedded descriptor, allowing immediate use with
any Option-01T switch controller, regardless of firmware
revision level.
•Capability of combining multiple multiplexers on-board to form
large multiplexers.
•Analog bus for combining multiple 1260-X138 plug-ins, to form
very large multiplexers.

1260-X138 User Manual
Specifications 1-2 Racal Instruments ©2005
Figure 1-1 The 1260-X138

1260-X138 User Manual
Racal Instruments ©2005 Specifications 1-3
Specifications Bandwidth (-3 dB):
MUX Channels:
1x8: From DC to 40MHz
1x24: From DC to 16MHz
Analog Channels:
From DC to 10MHz
Insertion Loss (From DC to 10MHz):
MUX Channels:
1x8: 0.6dB
1x16: 1.3dB
1x24: 2dB
1x32: 2.2dB
1x48: 4.5dB
1x64: 5.2dB
Analog Channels:
0.2dB @ 1MHz
2 dB @ 10MHz
Channel Crosstalk:
MUX Channels:
>64dB @ 1MHz
>50dB @ 10MHz
Analog Channels:
<-50dB @ 1MHz
<-45dB @ 10MHz
Channel Isolation:
MUX Channels:
>64dB @ 1MHz
>45dB @10 MHz
Analog Channels:
>80dB @ 1MHz
>45dB @ 10MHz
Noise Floor (MUX or Analog Channels):
< -100dB from DC to 10MHz
Switching Voltage:
250VAC, Max
220VDC, Max
300V (Pollution Class 1)

1260-X138 User Manual
Specifications 1-4 Racal Instruments ©2005
Switching Current:
2A 25% relays activated with 20°C temperature
rise
Switching Power:
60W below 10,000 feet
Path resistance (Differential or 2-Wire Mode):
MUX Channels:
1x8: 1Ω(Initial)
2.25Ω(End of life)
1x64: 1.7 Ω(Initial )
5.20Ω(End of Life)
Analog Channels:
<0.50Ω
Capacitance:
High to Low MUX Channels:
1x8: 80pF
1x16: 100pF
1x24: 160pF
1x32: 180pF
1x48: 270pF
1x64: 290pF
High to Low Analog Channels:
<120pF
High or Low MUX Channel to Chassis Ground:
<180pF
High or Low Analog Channel to Chassis Ground:
<170 pF
Open Switch Insulation resistance:
> 109Ω
Relay Switch Settling Time:
< 20 ms
Maximum Power Dissipation:
60W below 10,000 feet*
Cooling (25% Relays energized operating at full rated
current):
2.00 Liters/sec @ 0.15 mmH2O
Shock, Functional:
30g, 11 ms, ½ sine wave
Vibration, Non-operating:
0.013 in. P-P, 5-55 Hz

1260-X138 User Manual
Racal Instruments ©2005 Specifications 1-5
Bench Handling:
4 in., 45°
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*
Power Requirements:
+5 VDC 900mA + 30mA per energized relay
(2A Max.)
Weight :
0.70 lb. (0.35 kg.)
Dimensions :
4.4”Hx0.75”Wx12.6”D
MTBF (50% rated load, 0.1 cycle/hour):
With relays159,021 hours at 25°C
With relays142,422 hours at 30°C
Safety Standard:
EN61010-1
Pollution Class 2
Impulse Withstand 1000V
*Operation at between 10,000 feet and 15,000 feet requires de-
rating of maximum overall power dissipation to 49W

1260-X138 User Manual
Specifications 1-6 Racal Instruments ©2005
Ordering
Information
Listed below are part numbers for both the 1260-X138 switch
module and available mating connector accessories. Each
1260-X138 uses a single mating connector.
ITEM DESCRIPTION PART #
1260-X138 X-series Switch
Module
Switch Module, 8 (1X8) 2 Wire MUX, 2 A
Consists of:
P/N 980914-X138 Manual
408010
160-pin Mating Connector 160 Pin Conn. Kit with pins 407664
Additional Manual 1260-X138 Manual 980914-X138

1260-X138 User Manual
Racal Instruments ©2005 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
The instruments contains ESD-sensitive devices.
Open the package 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.

1260-X138 User Manual
Installation Instructions 2-2 Racal Instruments ©2005
Installation Installation of the 1260-X138 X-series Switching Module into a
1260-100X X-series Adapt-a-Switch Carrier assembly is described
in the “Installation” section of the 1260-100X X-series Adapt-a-
Switch Carrier manual (P/N 980914-100X).
Module
Configuration
The 1260-X138 contains eight 1x8 multiplexers, numbered from 0
through 7. Each multiplexer (mux) is made up of eight relays,
referred to as channels. Figure 2-1 shows an example of one of
these multiplexers (multiplexer 7). In this example, the inputs are
channels 70 through 77. The user may close one or more relays to
connect the inputs to the common output.
Configuration relays on 1260-X138 allow for formation of different
multiplexers.
The 1x8 multiplexers are the building blocks of various multiplexer.
Figure 2-2 and Figure 2-3 show the complete block diagram of the
1260-X138 relays.
Possible multiplexer configurations are:
Eight 1x8s, four 1x16s, two 1x32s, or one 1x64. In addition
Multiplexer groups 0, 1, 2 and groups 3, 4, 5 can be configured to
form three 2x8s, two 2x16s, or one 2x24.

1260-X138 User Manual
Racal Instruments ©2005 Installation Instructions 2-3
Figure 2-1 Single Multiplexer Example (Channels 70 through 77)
High
Low
High
Low
High
Low
High
Low
High
Low
High
Low
High
Low
High
Low
High
Low
Channel 70 Input
Channel 71 Input
Channel 72 Input
Channel 73 Input
Channel 74 Input
Channel 75Input
Channel 76 Input
Channel 77 Input
Mux 7 Common Output

1260-X138 User Manual
Installation Instructions 2-4 Racal Instruments ©2005
Since each channel is independently controlled, the user can
simultaneously connect any combination of multiplexer (MUX)
inputs to the common output of the same multiplexer.
For example, referring to Figure 2-1, the user may connect the
channel 71 and channel 73 inputs to the common output by closing
the channel 71 and channel 73 relays at the same time. Taking this
concept further, the user could even close the relays for channels
70 through 77 all at the same time, connecting all of this
multiplexer’s inputs to its common output.
Table 2-1 shows the group number and relays designators for the
particular groups.
Table 2-1 Relay Groups
Group Number Group Relay
Designators
0 K7-K14
1 K14-K22
2 K23-K30
3 K85-K92
4 K93-K100
5 K101-K108
6 K116-K123
7 K124-K131
Figure 2-1 shows just one of the eight multiplexers on the 1260-X138.
All eight multiplexers can operate independently.
The block diagram for the 1260-X138 is shown in Figure 2-2. Only
the high input and output sides of the Groups 0, 1, 2, 3, 4, and 5 are
displayed. Please refer to Table 2-3 listed in page 2-18 for complete
input/output pin designators. Figure 2-2 also shows that Group 0
along with Group 3, Group 1 with Group 4, and Group 2 and Group 5
can be configured to form three 2x8 2-wire mode multiplexers.
Table 2-2 lists the relays responsible for forming the 2x8 mode.
For example, by activating K31-K38, Group 0 and Group 3 can form a
2x8 2-wire multiplexer by switching common input of MUX Group 0
(E3, E2) and MUX Group 3 (E7, E6).

1260-X138 User Manual
Racal Instruments ©2005 Installation Instructions 2-5
Table 2-2 2x8 Formation Relays
Group Number Group Relay
Designators
0, 3 K31 - K38
1, 4 K39 - K46
2, 5 K47 – K54
Using formation relays and connecting relays, Group 0, 1, and 2
together with Group 3, 4, and 5 can be also configured to form a 2x24
2-wire mode multiplexer.
Table 2-2 lists the relays responsible for forming the 2x24 2-wire
mode multiplexer.
Table 2-3 2x8 Formation Relays
Group
Number Mode 2x24 Relay Designators Link Relays In Out
0, 1, 2 Default K7 – K30 K1, K2 MUX2
_COM
CH00-
CH07
CH10-
CH17
CH20-
CH27
3, 4, 5 Default K85 – K108 K79, K80 MUX5
_COM
CH30-
CH37
CH41-
CH47
CH51-
CH57
3, 4, 5 *
*Group 0, 1,
2
Disconnected
2x24
Energized
K85 – K108,
K31- K54
K79, K80 MUX5
_COM
CH00-
CH07
CH10-
CH17
CH20-
CH27

1260-X138 User Manual
Installation Instructions 2-6 Racal Instruments ©2005
-
Figure 2-2 1260-X138 Block Diagram 1x8 High Side Groups 0, 1, 2, 3, 4, and 5