Pickering 40-681A User manual

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Issue 1.5 November 2021
40-681A User Manual
PXI Solid State Versatile Multiplexer Module

Page (II) SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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Page (II) REED RELAY MODULE 40-110/115/120/125
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© COPYRIGHT (2021) PICKERING INTERFACES. ALL RIGHTS RESERVED.
No part of this publication may be reproduced, transmitted, transcribed, translated or stored in any form, or by
any means without the written permission of Pickering Interfaces.
Technical details contained within this publication are subject to change without notice.
ISO 9001
Reg No. FM38792

Page (III)
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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Page (III)
REED RELAY MODULE 40-110/115/120/125
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TECHNICAL SUPPORT
For Technical Support please contact Pickering Interfaces either by phone, the website or via e-mail.
WARRANTY
All products manufactured by Pickering Interfaces are warranted against defective materials and workmanship for a period of
three years, excluding programmable power supplies, from the date of delivery to the original purchaser. Any product found to be
defective within this period will, at the discretion of Pickering Interfaces be repaired or replaced.
Products serviced and repaired outside of the warranty period are warranted for ninety days.
Extended warranty and service are available. Please contact Pickering Interfaces by phone, the website or via e-mail.
ENVIRONMENTAL POLICY
Pickering Interfaces operates under an environmental management system similar to ISO 14001.
Pickering Interfaces strives to full all relevant environmental laws and regulations and reduce wastes and releases to the
environment. Pickering Interfaces aims to design and operate products in a way that protects the environment and the health and
safety of its employees, customers and the public. Pickering Interfaces endeavours to develop and manufacture products that can
be produced, distributed, used and recycled, or disposed of, in a safe and environmentally friendly manner.
Worldwide Technical Support and Product Information
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Germany
Tel: [phone]
E-mail: [email protected]
Sweden
Tel: [phone]
E-mail: [email protected]
USA
Tel: (West) [phone]
Tel: (East) [phone]
E-mail: [email protected]
Czech Republic
Tel: [phone]
E-mail: [email protected]
France
Tel [phone]
E-mail [email protected]
Pickering Interfaces Headquarters
Stephenson Road Clacton-on-Sea CO15 4NL United Kingdom
Tel: [phone]
E-Mail: [email protected]
China
Tel: [phone]
E-mail: [email protected]

Page (IV) SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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Page (IV) REED RELAY MODULE 40-110/115/120/125
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MEANING / DESCRIPTION SYMBOL
PROTECTIVE EARTH (GROUND)
To identify any terminal which is intended for connection to an external conductor for
protection against electric shock in case of a fault, or the terminal of a protective earth
(ground) electrode.
DANGEROUS VOLTAGE
To indicate hazards arising from dangerous voltages.
WARNING / CAUTION
An appropriate safety instruction should be followed or caution to a potential hazard
exists.
Refer to the relevant instructions detailed within the product manual.
HEAVY
If this product is heavy reference should be made to the safety instructions for
provisions of lifting and moving.
STATIC SENSITIVE
To indicate that static sensitive devices are present and handling precautions should
be followed.
!
kg
SAFETY SYMBOLS
PRODUCT SAFETY
The following safety symbols may be used on the product and throughout the product documentation.

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SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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Copyright Statement ...................................................................II
Technical Support and Warranty................................................III
Product Safety .............................................................................IV
Contents (this page)....................................................................V
Warnings and Cautions ..............................................................VII
Section 1
Technical Specication...............................................................1.1
Section 2
Technical Description .................................................................2.1
40-681A Functional Description...........................................2.1
Section 3
Installation....................................................................................3.1
Pre Operation Checks...........................................................3.1
Hardware Installation ............................................................3.2
Software Installation .............................................................3.2
Testing Operation ..................................................................3.3
Section 4
Programming Guide....................................................................4.1
Programming Options for PXI Modules ..............................4.1
Programming The Module ....................................................4.2
Programming Lookup Tables...............................................4.7
Section 5
Connector Information................................................................5.1
Section 6
Trouble Shooting.........................................................................6.1
Section 7
Maintenance Information............................................................7.1
Switching System Test Tools ...............................................7.1
Relay Lookup Tables.............................................................7.1
CONTENTS

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THIS PAGE INTENTIONALLY BLANK

Page (VII)
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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Page (VII)
2 AMP 1-POLE UHD MATRIX MODULES 40-575 / 576 / 577 / 578 / 579
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WARNINGS AND CAUTIONS
WARNING - HAZARDOUS ENVIRONMENTS SYMBOL
This product is not specically designed for use in hazardous environments, for example in explosive
atmospheres. If the product is to be used in hazardous environments we recommend that the user
ensures suitable protective measures are taken.
!
WARNING - DANGER OF ELECTRIC SHOCK SYMBOL
This module may contain hazardous voltages. Before removing the module from the rack remove all
supplies and disconnect user I/O signals.
Unused slots in the host chassis are populated with blanking plates to prevent access to user I/O
signals that may be present. Blanking panels are available to order from Pickering in a variety of
slot widths. If the product is not used in this manner for example by using an extender card then
additional care must be taken to avoid contact with exposed signals.
Not to be used in safety critical circuits, refer to the Pickering Interfaces’ terms & conditions of sale.
This module must not be used for the switching of Mains Circuits. For the switching of voltages up
to the module’s full specication, Secondary Circuit power supplies and the Device Under Test must
be fully isolated from the Mains Circuit and the safety earth.
The host chassis must be correctly installed and be connected to mains or factory safety ground,
please refer to your chassis installation manual.
Diagram Showing Separation Between The Mains Circuit and Secondary Circuit / DUT
For the purposes of this document, a Mains Circuit is an installation classied as Overvoltage
Category II up to 300V. Separation between the Secondary Circuit and Mains Circuit is achieved
by a transformer in which the primary windings are separated from the secondary windings by
reinforced insulation, double insulation, or a screen connected to the protective conductor terminal.
CAUTION - HANDLING OF ELECTROSTATIC-SENSITIVE DEVICES SYMBOL
Certain semiconductor devices used in this equipment are liable to damage due to static voltage.
Observe the following precautions when handling these devices in their unterminated state, or
sub-assemblies containing these devices:
1. Persons removing sub-assemblies from equipment using these devices must be earthed by a
wrist strap and a resistor at the point provided on the equipment.
2. Soldering irons used during the repair operations must be low voltage types with earthed tips and
isolated from the mains voltage by a double insulated transformer.
3. Outer clothing worn must be unable to generate static charges.
4. Printed Circuit Boards (PCBs) tted with these devices must be stored and transported in
anti-static bags.
PXI Switching
Module
Device
Under Test
Power
Supply
Power
Supply
Host Chassis
Secondary Circuit
Mains
Circuit
Mains
Circuit
Mains/Factory
Safety Ground

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Page (VIII) 2 AMP 1-POLE UHD MATRIX MODULES 40-575 / 576 / 577 / 578 / 579
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CAUTION - PRODUCT DOCUMENTATION SYMBOL
Suitably qualied & trained users should ensure that the accompanying documentation is fully read
and understood before attempting to install or operate the product.
!
SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
All cleaning and servicing requires the equipment to be isolated and disconnected from the power source and user I/O
signals (refer to the Maintenance Section).
• Appropriate manual handling procedures should be followed as dictated by the weight of the individual module or
the combined weight of the modules & chassis.
• Should a fault occur with the module or chassis, immediately isolate and disconnect the incoming power to the
chassis and the user I/O signals.
• Ensure the equipment is installed, operated and maintained by trained and authorised personnel.
• For suitably equipped products in the event of an emergency press the red “emergency stop” button situated on
the front of the unit.

Page 1.1
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
pickering SECTION 1 - TECHNICAL SPECIFICATION
SECTION 1 - TECHNICAL SPECIFICATION
pickeringtest.com
PXI Solid State Versatile Multiplexer 40-681A
ISSUE 1.3 NOV 2021
Supported by eBIRST
eBIRST switching system test tools simplify fault-finding
by quickly testing the system and graphically identifying
the faulty relay.
For more information go to: pickeringtest.com/ebirst
yVersatile Solid State Multiplexer
yConfigurable Architecture
y350 mA Hot or Cold Switching
ySurge Current of 1.5 A for 100 ms
y60 V Switching
yFast Switch Operation and Long Service Life
yVISA, IVI & Kernel Drivers Supplied for Windows
ySupported by PXI or LXI Chassis
ySupported by
eBIRST ™
y3 Year Warranty
The 40-681A Very High Density Versatile Multiplexer
module features a wide range of selectable switching
configurations. It is especially useful where a high density
multiplexer is required that can adapted to different
configurations for different test targets, or where a test
system may have to be reconfigured in the future. The
module uses high performance solid state relays which
have a long service life even when hot switching capacitive
loads. The 40-681A can sustain 1.5 A for 100 ms on hot or
cold switching.
MUX Configurations
The module can be set in software to be one of a large
number of multiplexer configurations. Switches allow the
multiplexer banks to be set as 1 or 2-pole and inter-bank
switching enables the channel count to be increased up to a
maximum of 128 (refer to schematic diagram overleaf).
Typical Configurations:
8-Banks, 16-Channel, 1-Pole
8-Banks, 8-Channel, 2-Pole
4-Banks, 32-Channel, 1-Pole
4-Banks, 16-Channel, 2-Pole
2-Banks, 64-Channel, 1-Pole
2-Banks, 32-Channel, 2-Pole
1-Bank, 128-Channel, 1-Pole
1-Bank, 64-Channel, 2-Pole
The versatility of the 40-681A’s architecture allows
all multiplexer banks to be inter-linked and common
connections used as extra signal inputs.
The 40-681A can be operated as a conventional multiplexer
with break-before-make action when a new channel is
selected. Alternatively, product variants can be supplied
that allow multiple channels to be simultaneously selected.
Isolation Switching connects only the currently active
multiplexer bank to the analog common, keeping capacitive
loading and leakage current in large multiplexer systems
to a minimum. Larger multiplexers may be constructed by
daisy chaining the common signals from multiple modules.
Pickering Interfaces is able to offer PXI solid state
switching solutions in a variety of configurations. If you
have a different requirement, contact your local sales office
for a quotation.
Pickering’s Range of Versatile Multiplexer Modules
with the same switching architecture
Model
No.
Max
Voltage
Max
Current
Operate
Time
Relay
Type
40-612A 300 VDC/
250 VAC 2 A 3 ms Electro- mechanical
40-681A ±60 V 350 mA 200 µs Solid State
40-682A ±40 V 250 mA 80 µs Solid State
40-683A ±100 V 125 mA 500 µs Solid State

Page 1.2 SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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SECTION 1 - TECHNICAL SPECIFICATION
Solid State Verstatile MUX, 40-681A
pickeringtest.com
Overview
1.2
1.1
2.2
2.1
3.2
3.1
4.2
4.1
5.2
5.1
8.2
8.1
6.2
6.1
7.2
7.1
MUX1
MUX2
16.2
9.1
MUX3
24.2
17.1
MUX4
32.2
25.1
MUX5
40.2
33.1
MUX6
48.2
41.1
MUX7
56.2
49.1
MUX8
64.2
57.1
Com 1.1
Com 1.2
Com 2.1
Com 2.2
Com 3.1
Com 3.2
Com 4.1
Com 4.2
Com 5.1
Com 5.2
Com 6.1
Com 6.2
Com 7.1
Com 7.2
Com 8.1
Com 8.2
1 Pole
Selection
Switches
Inter-bank Connection Switches Isolation
Switches
Functional Diagram of 40-681A Solid State Versatile Multiplexer

Page 1.3
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
pickering SECTION 1 - TECHNICAL SPECIFICATION
Solid State Verstatile MUX, 40-681A
pickeringtest.com
Specifications
Switching Specification
Switch Type: Solid State
Max Switch Voltage: ±60 V* (AC peak or DC)†
Max Standoff Voltage: 60 V* (between any two
points)†
Max Switch Current: 350 mA continuous
1.5 A for 100 ms
Path Resistance - On:
Leakage Current (off state):
3 Ω typical input to common
Typically less than 10 nA
at 60 V
Operate Time:
Switch Rise/Fall Time:
200 µs typical
<20 µs, no bounce
Multiplexer Bandwidth: 1 MHz
* For full voltage rating, signal sources to be switched
must be fully isolated from mains supply and safety earth.
† Differential voltage between channels must not exceed
rated voltage, additional caution should be used when
applying AC voltages as multiple asynchronous supplies
can create high differential voltages between channels.
Power Requirements
+3.3 V +5 V +12 V -12 V
0 1.06 A (typ 280 mA) 0 0
Operating/Storage Conditions
Operating Conditions
Operating Temperature:
Humidity:
Altitude:
0 °C to +55 °C
Up to 90 % non-condensing
5000 m
Storage and Transport Conditions
Storage Temperature:
Humidity:
Altitude:
-20 °C to +75 °C
Up to 90 % non-condensing
15000 m
PXI & CompactPCI Compliance
The module is compliant with the PXI Specification 2.2.
Local Bus, Trigger Bus & Star Trigger are not implemented.
Uses a 33 MHz 32-bit backplane interface.
Safety & CE Compliance
All modules are fully CE compliant and meet applicable
EU directives: Low-voltage safety EN61010-1:2010,
EMC Immunity EN61326-1:2013,
Emissions EN55011:2009+A1:2010.
Mechanical Characteristics
Single slot 3U PXI (CompactPCI card).
3D models for all versions in a variety of popular file
formats are available on request.
Connectors
PXI bus via 32-bit P1/J1 backplane connector.
Signals via front panel 160-pin male DIN 41612 connector,
for pin outs please refer to the operating manual.
Relay Type
The 40-681A is fitted with Solid State Switches.

Page 1.4 SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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SECTION 1 - TECHNICAL SPECIFICATION
Solid State Verstatile MUX, 40-681A
pickeringtest.com
Ordering Information
Support Products
eBIRST Switching System Test Tool
This product is supported by the eBIRST test tools which
simplify the identification of failed relays, the required
eBIRST tools are below. Note; for the single channel
selection mode version of this module (those without the
-MUX suffix) eBIRST will, when applicable, confirm if a
failure is present but is unable to localise it to a specific
component.
For more information go to: pickeringtest.com/ebirst
Product Test Tool Adaptor
40-681A 93-002-001 93-002-410
Mating Connectors & Cabling
For connection accessories for the 40-681A module
please refer to the 90-001D 160-pin DIN 41612 Connector
Accessories data sheet where a complete list and
documentation can be found for accessories, or refer to
the Connection Solutions catalog.
Product Order Codes
Channel
Selection Model Variant Order Code
Single Solid State Versatile MUX 40-681A-001
Note: The above module is available in multiple channel
selection mode by adding the “-M” suffix to the part
number.
Product Customization
Pickering modules are designed and manufactured on our
own flexible manufacturing lines, giving complete product
control and enabling simple customization to meet very
specific requirements.
Customization can include:
• Alternative relay types
• Mixture of relay types
• Alternative number of relays
• Different performance specifications
All customized products are given a unique part number,
fully documented and may be ordered at any time in the
future. Please contact your local sales office to discuss.
Soft Front Panel For The Versatile MUX
The Versatile Multiplexer Soft Front
Panel for the 40-612A, 40-681A, 40-682A
and 40-683A allows easy setting of
various multiplexer configurations
from 8-bank 8-channels 2-pole, up to
1-bank 128-channels 1-pole as well
as individual relay control for custom
configurations. The schematic in the
background of the SFP simplifies
understanding of the selected topology.
During configuration setting, all relay
control information is logged in a text file
which can be re-used in a programming
environment.
Soft Front Panel for the 40-612A, 40-681A, 40-682A and
40-683A Very High Density Versatile Multiplexers

Page 1.5
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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Solid State Verstatile MUX, 40-681A
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Supporting Products & Software
We also offer customized cabling and have a free online Cable Design Tool
that can be used to create custom cable solutions for many applications.
Visit: pickeringtest.com/cdt to start your design.
Mass Interconnect
We recommend the use of a mass interconnect solution when an
Interchangeable Test Adapter (ITA) is required for a PXI or LXI based
test system. Our modules are fully supported by both Virginia Panel and
MacPanel.
Pickering Reed Relays
We are the only switch provider with in-house reed relay manufacturing
capability via our Relay Division. These instrument grade reed relays feature
SoftCenter™ technology, ensuring long service life and repeatable contact
performance. To learn more, please go to: pickeringrelay.com
Chassis Compatibility
This PXI module must be used in a suitable chassis. It is compatible with the following chassis types:
• All chassis conforming to the 3U PXI and 3U Compact PCI (cPCI) specification
• Legacy and Hybrid Peripheral slots in a 3U PXI Express (PXIe) chassis
• Pickering Interfaces LXI or LXI/USB Modular Chassis
Chassis Selection Guide
Standard PXI or hybrid PXIe Chassis from any Vendor:
• Mix our 1000+ PXI switching & simulation modules with
any vendor’s PXI instrumentation
• Embedded or remote Windows PC control
• Real-time Operating System Support
• High data bandwidths, especially with PXI Express
• Integrated module timing and synchronization
Pickering LXI or LXI/USB Modular Chassis—only accept
our 1000+ PXI Switching & Simulation Modules:
• Ethernet or USB control enables remote operation
• Low-cost control from practically any controller
• LXI provides manual control via Web browsers
• Driverless software support
• Power sequencing immunity
• Ethernet provides chassis/controller voltage isolation
• Independence from Windows operating system
Connectivity Solutions
We provide a full range of supporting cable and connector solutions for all our switching products—20 connector families
with 1200+ products. We offer everything from simple mating connectors to complex cables assemblies and terminal blocks.
All assemblies are manufactured by Pickering and are guaranteed to mechanically and electrically mate to our modules.
Connectors & Backshells Multiway Cable Assemblies RF Cable Assemblies Connector Blocks

Page 1.6 SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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SECTION 1 - TECHNICAL SPECIFICATION
Solid State Verstatile MUX, 40-681A
pickeringtest.com
Supporting Products & Software
© Copyright (2021) Pickering Interfaces. All Rights Reserved Pickering Interfaces maintains a commitment to continuous product development, consequently we reserve the right to vary from the description given in this data sheet.
Programming
Pickering provide kernel, IVI and VISA (NI & Keysight) drivers which are compatible with all Microsoft supported versions of
Windows and popular older versions. For a list of all supporting operating systems, please see: pickeringtest.com/os
The VISA driver is also compatible with Real-Time Operating Systems such as LabVIEW RT. For other RTOS support contact
Pickering. These drivers may be used with a variety of programming environments and applications including:
• Pickering Interfaces Switch Path Manager
• National Instruments products (LabVIEW, LabWindows/CVI, Switch Executive, MAX, TestStand, VeriStand, etc.)
• Microsoft Visual Studio products (Visual Basic, Visual C+)
• Keysight VEE and OpenTAP
• Mathworks Matlab
• Marvin ATEasy
• MTQ Testsolutions Tecap Test & Measurement Suite
Drivers for popular Linux distributions are available, other environments are also supported, please contact Pickering
with specific enquiries. We provide Soft Front Panels (SFPs) for our products for familiarity and manual control, as well as
comprehensive documentation and example programs to help you develop test routines with ease.
To learn more about software drivers and development environments, please go to: pickeringtest.com/software
Signal Routing Software
Our signal routing software, Switch Path Manager, automatically selects and energizes
switch paths through Pickering switching systems. Signal routing is performed by simply
defining test system endpoints to be connected together, greatly accelerating Test System
software development. To learn more, please go to: pickeringtest.com/spm
Diagnostic Relay Test Tools
eBIRST Switching System Test Tools are designed specifically for our PXI,
PCI or LXI products, these tools simplify switching system fault-finding by
quickly testing the system and graphically identifying the faulty relay.
To learn more, please go to: pickeringtest.com/ebirst
Three Year Warranty & Guaranteed Long-Term Support
All standard products manufactured by Pickering Interfaces are warranted against defective materials and workmanship
for a period of three years from the date of delivery to the original purchaser. Extended warranty and service agreements
are available for all our modules and systems with various levels to suit your requirements. Although we offer a 3-year
warranty as standard, we also include guaranteed long-term support—with a history of supporting our products for typically
15-20 years. To learn more, please go to: pickeringtest.com/support
Available Product Resources
We have a large library of product resources including success stories, product and support videos, articles and white
papers as well as application specific product brochures to assist when looking for the switching, simulation and
connection solutions you need. We have also published handy reference books on Switching Technology and for the PXI
and LXI standards.
To view, download or request any of our product resources, please visit: pickeringtest.com/resources

Page 2.1
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
pickering SECTION 2 - TECHNICAL DESCRIPTION
SECTION 2 - TECHNICAL DESCRIPTION
40-681A Functional Description
The 40-681A can be congured by the user to provide many different multiplexer congurations. This functional
description provides an overview of these possibilities based on the functional diagram in Figure 2.1.
1.2
1.1
2.2
2.1
3.2
3.1
4.2
4.1
5.2
5.1
8.2
8.1
6.2
6.1
7.2
7.1
MUX1
MUX2
16.2
9.1
MUX3
24.2
17.1
MUX4
32.2
25.1
MUX5
40.2
33.1
MUX6
48.2
41.1
MUX7
56.2
49.1
MUX8
64.2
57.1
Com 1.1
Com 1.2
Com 2.1
Com 2.2
Com 3.1
Com 3.2
Com 4.1
Com 4.2
Com 5.1
Com 5.2
Com 6.1
Com 6.2
Com 7.1
Com 7.2
Com 8.1
Com 8.2
1 Pole
Selection
Switches
Inter-bank Connection Switches Isolation
Switches
Figure 2.1 - 40-681A Module: Switching Functional Diagram

Page 2.2 SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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SECTION 2 - TECHNICAL DESCRIPTION
MUX1 to MUX8
Each of these MUX building blocks (MUX1 to MUX8) implements a two pole 8 way MUX. All the MUXs are identical.
To simplify the descriptions this is now referred to as the output MUX.
1.2
1.1
2.2
2.1
3.2
3.1
4.2
4.1
5.2
5.1
8.2
8.1
6.2
6.1
7.2
7.1
MUX1
To 1 Pole
Selection
Switches
Figure 2.2 - 40-681A Module: Output MUX
1 Pole Selection Switches
Each of these switches allows the MUX to be set to be one pole or two pole, or allows the corresponding MUX
output to be disconnected:
2 pole setting
Series relays are closed and shunt switch is open. The inputs to the output MUX are routed from the COM
lines.
1 Pole
Selection
Switches
To Inter-bank
Connection
Switches
To
Output
MUX
Pole1
Pole2
Figure 2.3 - 40-681A Module: 2-Pole Setting

Page 2.3
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
pickering SECTION 2 - TECHNICAL DESCRIPTION
1pole setting
The shunt switch is closed so that the two input connections are connected, one of the series relays is open
and the other is closed so one side of the output MUX is connected but not the other side. Using the two series
relays to select just one pole of the output MUX allows the MUX to perform the function of 16 way MUX
Note: The method of creating a 1-pole MUX described means that the commons of the two poles are connected
together.
A 1-pole MUX can also be created where the shunt switch is only closed when the the Pole 2 switch is closed,
it is open when the Pole 1 switch is closed. It can also be congured so the shunt switch is only closed when
the Pole 1 series switch is closed and open when the Pole 2 switch is closed.
The difference in the two methods is that with the shunt switch closed in both situations the user can use the
pole 1 or pole 2 common for connection since they are connected together. With the alternative scheme the
user must determine if they connect to the pole 1 or the pole 2 common and be aware that for some settings
the two poles are linked together.
1 Pole
Selection
Switches
To Inter-bank
Connection
Switches
To
Output
MUX
Pole1
Pole2
1 Pole
Selection
Switches
To Inter-bank
Connection
Switches
To
Output
MUX
Pole1
Pole2
Figure 2.4 - 40-681A Module: Selecting Pole 1 or Pole 2 to Create a 1-Pole MUX
Isolation Setting
The output MUX can be disconnected by opening the series relays
Note: Disconnection can also be set by using the Isolation Switches, however if the module is being set as a
wide MUX then it may on some occasions be desirable to use this control to lower the capacitive loading on
the MUX by disconnecting unwanted sections>
Example: If MUX1 and MUX2 are used together to form a 32 way MUX and a connection is closed from COM1
to MUX2 then MUX1 can be disconnected using this setting.

Page 2.4 SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
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SECTION 2 - TECHNICAL DESCRIPTION
Interbank Connection Switches
This set of switches can be used to connect MUX1 to MUX8 in various combinations to form a wider MUX. The bank
switching is tiered to allow the choice of different combinations:
Interbank COM1 First Tier
COM1 can be connected to COM2, COM4, COM6 and/or COM8 directly using two pole switches. This allows
MUX2, MUX4, MUX6 and/or MUX8 to be added to COM1 to provide a wider MUX
Com 1
Com 2
Com 3
Com 4
Com 5
Com 6
Com 7
Com 8
To 1 Pole
Selection
Switches
Inter-bank Connection Switches
To
Isolation
Switches
Figure 2.5 - 40-681A Module: Inter-Bank Connections - First Tier Switches

Page 2.5
SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
pickering SECTION 2 - TECHNICAL DESCRIPTION
Com 1
Com 2
Com 3
Com 4
Com 5
Com 6
Com 7
Com 8
To 1 Pole
Selection
Switches
Inter-bank Connection Switches
To
Isolation
Switches
Figure 2.6 - 40-681A Module: Inter-Bank Connections - First and Second Tier Switches
Interbank Second Tier Connections
There are then a second tier of switches that can either be used to expand the connections to COM1 listed
above by connecting these COM lines to a COM line already connected to COM1 or used to simply expand
the COM line they are associated with.
Example 1: COM 1 to COM 8 can all be connected together by closing the rst tier relays above and then
closing the second tier relays identied above.
Example 2: COM1, COM2, COM4, COM6, COM8 can be combined together as a single MUX and COM 3,
COM5, Com7 used as separate MUXs by closing the rst tier switches and leaving the second tier switches
open.

Page 2.6 SOLID STATE VERSATILE MULTIPLEXER MODULE 40-681A
pickering
SECTION 2 - TECHNICAL DESCRIPTION
Isolation Switches
The isolation switches simply disconnect the COM ports from the MUXs. This can be desirable because it removes
any loading these connections might put on the test system and also ensures that if the module is used to create
wider MUXs then the signals on the other COM ports can be disconnected from those being routed to the output
MUX and therefore avoid an unintentional connection.
Very Wide MUXs
It should be noted that the COM ports can be used as MUX outputs in some circumstances.
Example: If COM 1 is used as the input and all output MUXs connected to it then COM2 to COM 8 can be used
as additional MUX outputs by closing the interbank and isolation switches.
Figure 2.8 - 40-681A Module: Isolation Switches
Com 1.1
Com 1.2
Com 2.1
Com 2.2
Com 3.1
Com 3.2
Com 4.1
Com 4.2
Com 5.1
Com 5.2
Com 6.1
Com 6.2
Com 7.1
Com 7.2
Com 8.1
Com 8.2
To Inter-bank
Connection
Switches
Isolation
Switches