Pickering 40-855A User manual

pickeringtest.com
Issue 1.3 November 2022
40/42-855A User Manual
PXI/PXIe MEMS Fiber Optic Switch Module

Page (II) MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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Page (II) REED RELAY MODULE 40-110/115/120/125
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© COPYRIGHT (2022) 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

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MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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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
pickeringtest.com
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) MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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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 and reference should be made to the safety instructions for
provisions of lifting and moving.
LASER PRODUCT
This product is capable of switching laser optical signals.
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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MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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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
Functional Description..........................................................2.1
Hardware Interlock ................................................................2.2
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 Pickering PXI/PXIe Modules ...4.1
Module Architecture..............................................................4.2
Programming The Module ....................................................4.3
Section 5
Connector Information................................................................5.1
Section 6
Trouble Shooting .........................................................................6.1
Section 7
Maintenance Information............................................................7.1
Relay Lookup Tables.............................................................7.1
Component Layout................................................................7.2
CONTENTS

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REED RELAY MODULE 40-110/115/120/125
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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 PXI/LXI 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.
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.
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.
!
WARNING - RISK OF INJURY SYMBOL
This product may be specically designed to switch optical signals. Under no circumstances look
into the end of an optical output or an optical cable attached to an optical output. LASER RADIATION
CAN SERIOUSLY DAMAGE YOUR EYESIGHT.
Read and understand the safety information of the laser source connected to the optical switch.

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Page (VIII) REED RELAY MODULE 40-110/115/120/125
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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.
• Modules are not accessed to EN 60825, users should observe the safety instructions and laser
class for the 3rd party laser source.
• The module may be capable of switching optical signals from a laser device; do not stare directly
at the user I/O ports.
• 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
MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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SECTION 1 - TECHNICAL SPECIFICATION
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PXI/PXIe MEMS Fiber Optic Switch 40/42-855A
ISSUE 1.1 NOV 2022
yAvailable as PXI or PXIe Modules
ySingle, Dual, Triple or Quad 2 to 1 Fiber Optic MUX
yAvailable With Optional Hardware Interlock
yHigh Density 1 or 2 Slot Width Modules
yFC/APC, FC/PC or SC/PC Connectors
ySmall Form Factor Connectors LC or
MU (mini SC)
ySingle Mode & Multi-Mode Versions
yLong Operating Life, High
Repeatability & Temperature Stability
yFast Switching Time
yLED Indication Included on Specific Models
yVISA, IVI & Kernel Drivers Supplied for Windows
yPXI Versions Supported by PXI or LXI Chassis
y3 Year Warranty
The 40-855A (PXI) and 42-855A (PXIe) are 2-channel MEMS
fiber optic multiplexers available in single, dual, triple or
quad formats with a choice of different connector styles to
suit most applications: FC/APC (for optimal performance),
FC/PC and SC/PC for general applications and LC and MU
for high density applications.
These multiplexers use MEMS (Micro-Electro-Mechanical-
Systems) based optical switches to route the common to a
channel by redirecting the optical signal. This is achieved
using micro-mechanical mirrors driven by a highly precise
mechanism activated via an electrical control signal.
MEMS (Micro-Electro-Mechanical-Systems) technology offers
many advantages over traditional Optical Prism Technology
as used in module types 40-810/815/820. MEMS offer similar
optical performance but with lower price, higher packing
density, faster operate time and much longer operating life.
Ch1
Ch2
Com
Ch1.1
Ch1.2
Com1
Ch2.1
Ch2.2
Com2
Ch1.1
Ch1.2
Com1
Ch2.1
Ch2.2
Com2
Ch3.1
Ch3.2
Com3
Ch1.1
Ch1.2
Com1
Ch2.1
Ch2.2
Com2
Ch3.1
Ch3.2
Com3
Ch4.1
Ch4.2
Com4
Pickering can construct custom optical systems to
customers precise requirements. We have a large range
of electrical switching modules which can form a complete
PXI based telecom switching solution.
Applications for these multiplexers can be found in fiber
network configuration, fiber optic component test or where
optical signal routing is required.
40-855A Single
2-Channel MUX,
FC/PC Connectors, With
Hardware Interlock
Option
40-855A Dual
2-Channel MUX,
FC/APC
Connectors,
Without
Hardware
Interlock
Single
Dual
Triple
Quad
40/42-855A 2-Channel Fiber Optic Multiplexer
Alternative Optical Switching Products
We also offer larger switching populations and alternative
architectures in plug-in module format hosted by our
LXI Scalable Chassis. The 65-280 range includes 2x2,
4x4, 5x5, 8x8 and 16x16 optical matrices, and the 65-281
range includes SPST, 2:1, 4:1, 8:1 16:1 and 32:1 optical
multiplexers. All configurations are available with single or
multi-mode fibre and a choice of connectors.

Page 1.2 MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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SECTION 1 - TECHNICAL SPECIFICATION
MEMS Fiber Optic Switch, 40/42-855A
pickeringtest.com
Specifications
Power Requirements - 40-855A
+3.3 V +5 V +12 V -12 V
150 mA 300 mA (typ 220 mA) 0 0
Power Requirements - 42-855A
+3.3 V +12 V
150 mA TBD
General Specification (All versions)
Fiber Switch Type:
Internal Fiber Type:
MEMS
SM 9/125
Wavelength:
Insertion loss:
Return loss (APC version):
Return loss (other versions):
Polarization dependent loss (PDL):
Repeatability:
Crosstalk:
Optical Input Power:
1240 to 1640 nm
0.8 dB Typ
60 dB Min
55 dB Min
0.05 dB Max
±0.01 dB Max
-60 dB Max
300 mW Max
Thermal Stability:
(-10 to 75 °C insertion loss variation)
0.2 dB Max
Expected Life: >>109 operations
Maximum Switching Time:
Cycle Rate:
1 ms
500/sec
Additional Specification (MM versions)
Fiber Switch Type:
Internal Fiber Type:
MEMS
MM 62.5/125
Wavelength:
Insertion loss:
Return loss:
Polarization dependent loss (PDL):
700 to 1700 nm
0.8 dB Typ
55 dB Min
0.05 dB Max
Connectors
40-855A - PXI bus via 32-bit P1/J1 backplane connector.
42-855A - PXIe bus via XJ3 and XJ4 backplane connectors.
Signals via front panel connectors, for connector positions
please refer to the operating manual:
• 40/42-855A-0x2 FC/APC connectors
• 40/42-855A-1x2 FC/PC connectors
• 40/42-855A-2x2 SC/PC connectors
• 40/42-855A-3x2 MU (mini SC) connectors
• 40/42-855A-4x2 LC connectors
• 40/42-855A-2x2-M SC connectors
• 40/42-855A-5x2-M ST connectors
• Interlock: 1 x 4-pin female 00 series connector*
(40/42-855A versions with hardware interlock option)
*Mating half supplied when hardware interlock option
ordered.
Other Connector Types
Pickering can manufacture fiber optic switch modules
with other connector types, please contact sales office for
further information.
Hardware Interlock
The 40/42-855A modules are available with an
optional hardware interlock. The interlock, when
activated, will return all optical switches to their
default unpowered state (assuming the switches
are fully functional) and also provide error
notification via the software interface. The interlock
feature can be daisy-chained between additional
hardware interlock enabled modules for example
to allow one signal to disable multiple cards.
For further details please refer to the Hardware
Interlock section within the user manual.
The hardware interlock feature is not available on
40/42-855A-4xx modules due to the size of the LC
connectors.
Note: LED indication is not available for modules
with the hardware interlock feature.
100 Ω
+3.3 V
GND
External
Wire Link
Front Panel
Connector
Interlock
Daisy-chain
Interlock
Detection
Circiuitry
Processor Relay Driver(s)
SPI Serial
Comms
Output Enable
SPI Serial
Comms
Output Enable
Drive
Outputs
To
Optical
Switches
Interlock Signal Routing Diagram for 40/42-855A
Versions With Hardware Interlock Option
Interlock Connector
Mechanical Characteristics
40-855A - 3 U PXI (CompactPCI card). Single or dual slot as
indicated in Product Order Codes.
42-855A - 3 U PXIe, compatible with PXIe hybrid slot. Single
or dual slot as indicated in Product Order Codes.
Module weight: <0.8 Kg typical.
3D models for all versions in a variety of popular file
formats are available on request.

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MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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MEMS Fiber Optic Switch, 40/42-855A
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Specifications & Ordering Information
Product Order Codes - 2 Channel Fiber Optic Multiplexers Without Hardware Interlock
Connector
Type
PXI/PXIe
Slots
Fiber Type
Single-Mode 9/125 Multi-Mode 62.5/125
Single 2
Channel
MUX
PXI
FC/APC 1 40-855A-012 ─
FC/PC 1 40-855A-112 ─
SC/PC 1 40-855A-212 ─
MU (mini SC) 1 40-855A-312 ─
LC 140-855A-412 ─
SC 1 ─40-855A-212-M
ST 1─40-855A-512-M
PXIe
FC/APC 1 42-855A-212 ─
FC/PC 1 42-855A-112 ─
SC/PC 1 42-855A-212 ─
MU (mini SC) 1 42-855A-312 ─
LC 142-855A-412 ─
SC 1 ─42-855A-212-M
ST 1─42-855A-512-M
Dual 2
Channel
MUX
PXI
FC/APC 2 40-855A-022 ─
FC/PC 2 40-855A-122 ─
SC/PC 2 40-855A-222 ─
MU (mini SC) 1 40-855A-322 ─
LC 140-855A-422 ─
SC 2 ─40-855A-222-M
ST 2─40-855A-522-M
PXIe
FC/APC 2 42-855A-222 ─
FC/PC 2 42-855A-122 ─
SC/PC 2 42-855A-222 ─
MU (mini SC) 1 42-855A-322 ─
LC 142-855A-422 ─
SC 2 ─42-855A-222-M
ST 2─42-855A-522-M
Triple 2
Channel
MUX
PXI MU (mini SC) 1 40-855A-332 ─
LC 140-855A-432 ─
PXIe MU (mini SC) 1 42-855A-332 ─
LC 142-855A-432 ─
Quad 2
Channel
MUX
PXI MU (mini SC) 1 40-855A-342 ─
LC 140-855A-442 ─
PXIe MU (mini SC) 1 42-855A-342 ─
LC 142-855A-442 ─
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
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.
PXI & CompactPCI Compliance - 40-855A
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.
PXIe Compliance - 42-855A
The module is compliant with the PXIe Specification 1.0.
Local Bus, Trigger Bus & Star Trigger are not implemented.

Page 1.4 MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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SECTION 1 - TECHNICAL SPECIFICATION
MEMS Fiber Optic Switch, 40/42-855A
pickeringtest.com
Ordering Information
Product Order Codes - 2 Channel Fiber Optic Multiplexers With Hardware Interlock
Connector
Type
PXI/PXIe
Slots
Fiber Type
Single-Mode 9/125 Multi-Mode 62.5/125
Single 2
Channel
MUX
PXI
FC/APC 1 40-855A-012-HI ─
FC/PC 1 40-855A-112-HI ─
SC/PC 1 40-855A-212-HI ─
MU (mini SC) 1 40-855A-312-HI ─
SC 1 ─40-855A-212-M-HI
ST 1─40-855A-512-M-HI
PXIe
FC/APC 1 42-855A-212-HI ─
FC/PC 1 42-855A-112-HI ─
SC/PC 1 42-855A-212-HI ─
MU (mini SC) 1 42-855A-312-HI ─
SC 1 ─42-855A-212-M-HI
ST 1─42-855A-512-M-HI
Dual 2
Channel
MUX
PXI
FC/APC 2 40-855A-022-HI ─
FC/PC 2 40-855A-122-HI ─
SC/PC 2 40-855A-222-HI ─
MU (mini SC) 1 40-855A-322-HI ─
SC 2 ─40-855A-222-M-HI
ST 2─40-855A-522-M-HI
PXIe
FC/APC 2 42-855A-222-HI ─
FC/PC 2 42-855A-122-HI ─
SC/PC 2 42-855A-222-HI ─
MU (mini SC) 1 42-855A-322-HI ─
SC 2 ─42-855A-222-M-HI
ST 2─42-855A-522-M-HI
Triple 2
Channel
MUX
PXI MU (mini SC) 1 40-855A-332-HI ─
PXIe MU (mini SC) 1 42-855A-332-HI ─
Quad 2
Channel
MUX
PXI MU (mini SC) 1 40-855A-342-HI ─
PXIe MU (mini SC) 1 42-855A-342-HI ─
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 fiber types
• Alternative connector types
• Alternative number of channels
• 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.
Support Products
Interlock Connectors
For modules with the hardware interlock option
(40/42-855A-xx2-HI) spare/replacement connectors can
be ordered.
Product Description
44-961-040 Connector with internal link (replacing
that supplied with the module).
44-960-040 Connector only, no internal wiring.

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MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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MEMS Fiber Optic Switch, 40/42-855A
pickeringtest.com
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
The PXI versions of this module must be used in a suitable chassis. They are 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
The PXIe versions of this module are compatible with the following chassis types:
• All chassis conforming to the 3U PXIe specification
• PXIe and Hybrid Peripheral slots in a 3U PXI Express (PXIe) 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 MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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SECTION 1 - TECHNICAL SPECIFICATION
MEMS Fiber Optic Switch, 40/42-855A
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
MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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SECTION 2 - TECHNICAL DESCRIPTION
FUNCTIONAL DESCRIPTION
A functional block diagram is provided in Figure 2.1. The module is powered by +5V (PXI), +3.3V and +12V supplies
via PCI Bus or PXIe Bus connectors mounted on a mother board. The interface to the user test equipment is via ber
connectors mounted on the front panel. The module comprises the mother board populated with control logic and
one, two, three or four 2-channel MEMS optical switches. Discrete optical bers link the ports on the switches to the
connectors on the front panel. The switches and front panel LED indicators (tted to selected models) are energised
via control signals from driver devices. The drivers are addressed by PCI bridge U1, to output the required signal.
Module conguration and setup information for the PCI bridge is stored in Serial EPROM devices.
Relay
& LED
Drivers
PXI/PXIe Fiber Optic Switch Module 40/42-855A
Memory
U9-10
Level
Shifters
U2-3
PCI Bridge U1
+3.3V
GND
Configuration
Memories
U7-8
Compact PCI Bus Connector or PXIe Connectors
+5V (PXI)
+12V
Front Panel
Fiber Connectors
1, 2, 3 or 4
2-Channel Optical
Switches
Front Panel
Mounted LED
Indicators
(selected models)
Front Panel
Fiber Connectors
Figure 2.1 - Fiber Optic Multiplexer Module 40/42-855A:
Functional Block Diagram

Page 2.2 MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
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SECTION 2 - TECHNICAL DESCRIPTION
HARDWARE INTERLOCK
The 40/42-855A-xxx-HI modules have an interlock feature that can be used to return the optical switches (assuming
they are fully functional) to their default unpowered state if the interlock connector is not in place or if the connection
between the two interlock pins is open-circuit.
The user connector has the following control pins:
●Pin1: A 3.3V output from a 100Ω series protection resistor
●Pin2: An Enable pin which is by default pulled low by a 10kΩ resistor. NO OPTICAL SWITCHES WILL
BE SWITCHED BY THE MODULE UNLESS THIS PIN VOLTAGE IS RAISED TO 3.3V.
The pin can be raised to 3.3V by connecting to the supplied 3.3V pin above. This is a global Enable for
all the optical switches on the module. If the Enable pin is allowed to be set low then the module will
continue to disable the optical switch operation until the software resets the channels to be on.
●Pin3: A Status Readback pin which is raised to 3.3V when the Enable pin is set high AND the software
has reset the module to enable optical switch control. This is available as physical signal on the user
connector and its status can be read back by the software driver.
●Pin 4: A connection to PXI Ground
The interlock can be used in a variety of ways when multiple modules are used in a system:
●All the Enable pins can be linked together and a single switch used to pull the Enable high to 3.3V. The
enable pin can be pulled high using a user connection. The software driver can then enable or disable
individual channels.
●All but one of the Enable pins can be connected together and connected to the Readback Status pin
of one of the modules (Master Module). The Master Module then has its Enable pin connected high
(3.3V). To restart the system the software driver would then have to enable each module through the
Master Module’s Module Enable and then turn on each 40/42-855A through its Module Enable.
●Each module can be independently controlled by linking its Enable pin to its 3.3V pin, if the user
connector is disconnected or if the link between the interlock pins is open-circuit all the optical switches
will return to the default unpowered state and will require restarting through its software driver control.
●The Status Readback output from one module can be connected to the Enable of the next module in
the series chain. Disconnection of the user connector or if the link between the interlock pins is open-
circuit will result in the optical switches of all the modules further returning to their default unpowered
state. As in the previous cases when the user connection is re-established the software driver will need
to restart the system.
It should be emphasized that if the Enable pin of the module is set low, even temporarily, the module will not
automatically turn back on when the Enable returns high. The software driver must be used to turn the channels
back on.
If required, spare / replacement hardware interlock connector(s) can be purchased, please refer to Support Products
in Section 1 for details.

Page 2.3
MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
pickering SECTION 2 - TECHNICAL DESCRIPTION
Enable
40/42-855A-xxx-HI
Optical
Switch
Module
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
To Other Modules With Hardware Interlock
40/42-855A-xxx-HI
Optical
Switch
Module
40/42-855A-xxx-HI
Optical
Switch
Module
Enable
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
To Other Modules With Hardware Interlock
MASTER
40/42-855A-xxx-HI
Optical
Switch
Module
40/42-855A-xxx-HI
Optical
Switch
Module
40/42-855A-xxx-HI
Optical
Switch
Module
Enable
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
40/42-855A-xxx-HI
Optical
Switch
Module
40/42-855A-xxx-HI
Optical
Switch
Module
40/42-855A-xxx-HI
Optical
Switch
Module
Enable
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
To Other Modules With Hardware Interlock
MASTER
40/42-855A-xxx-HI
Optical
Switch
Module
40/42-855A-xxx-HI
Optical
Switch
Module
40/42-855A-xxx-HI
Optical
Switch
Module
All Modules Enabled by a Common Signal
Modules Enabled by a Master
Each Module Enabled Independently
Modules’ Enables Daisy-Chained From a Master
Figure 2.2 - 40/42-855A-xxx-HI Modules - Use of Hardware Interlock Option

Page 2.4 MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
pickering
SECTION 2 - TECHNICAL DESCRIPTION
THIS PAGE INTENTIONALLY BLANK

Page 3.1
MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
pickering SECTION 3 - INSTALLATION
Page 3.1
REED RELAY MODULE 40-110/115/120/125
pickeringSECTION 3 - INSTALLATION
kg
PREOPERATION CHECKS (UNPACKING)
1. Check the module for transport damage and report any damage immediately to Pickering Interfaces.
Do not attempt to install the product if any damage is evident.
2. Position the chassis relative to any other equipment the module(s) will connect with. Ensure the chassis is not
connected to the electrical supply.
3.
withstand and support the combined weight of the module(s) and chassis.
SECTION 3 - INSTALLATION
!
Refer to the Warnings and Cautions at the front of this manual
Modular products require installation in a suitable PXI/PXIe/LXI chassis. The module is for indoor use only.
Figure 3.1 - Installing the Module into a PXI/PXIe/cPCI/LXI Chassis
PXI / PXIe / LXI Chassis
Ensure that the designated area for the chassis containing the module is of flat and solid construction to
PXI / PXIe Module

Page 3.2 MEMS FIBER OPTIC SWITCH MODULE 40/42-855A
pickering
SECTION 3 - INSTALLATION
Page 3.2 REED RELAY MODULE 40-110/115/120/125
pickering
SECTION 3 - INSTALLATION
SOFTWARE INSTALLATION
First install the appropriate Pickering PXI switch card drivers by running the installer program Setup.exe (provided
in a compressed zip le), either from the CD-ROM supplied, or by downloading the latest version from our website
pickeringtest.com - the recommended method. Setup is accompanied by a ReadMe le containing
additional installation information. A single installation covers all cards in the System 40, System 45 and System
50 ranges.
When installation completes, the installed drivers’ ReadMe le is offered for display. It can also be displayed
later using a shortcut on the Programs>>Pickering menu.
If you are not a LabVIEW user you should choose the “full” version, and once that has been installed run
the LabVIEW Runtime Engine installer via the shortcut on the Programs>>Pickering menu. In the absence of
LabVIEW the Runtime Engine is required to support the Pickering Test Panels application.
!
HARDWARE INSTALLATION
ELECTRICAL CONNECTION (CHASSIS)
1. The chassis must be electrically installed in accordance with local regional electrical codes by a qualied
engineer.
2. The chassis must be grounded.
Electrostatic discharge can damage the components on the module. To avoid such damage in handling the
board refer to page VII.
Ensure that there is adequate ventilation.
The module should be installed in accordance with the following procedure:
1. Ensure that the system is turned OFF but still connected to mains so that it remains grounded.
2. Choose an appropriate slot in the rack.
3. Remove the blanking plate for the chosen slot.
4. Ensure that the injector/ejector handle is in its downward position. Align the module with the card guides on
the top and bottom of the slot.
Do not raise the injector/ejector handle whilst inserting the module as the module will not insert properly.
5. Hold the handle whilst slowly sliding the module into the card guides until the handle catches on the injector/
ejector rail (refer to Figure 3.1).
6. Raise the injector/ejector handle until the module rmly seats into the backplane. The front panel of the
module should be ush with the front panel of the chassis.
7. Secure the front panel of the module using both screws to the chassis front panel mounting rails.
8. In a system employing a remote control interface to connect an external controller to a PXI chassis or to link
multiple chassis, power-up the system as follows:
a. For a system comprising an external controller and one chassis, power up the chassis before powering up
the external controller.
b. For a system comprising more than one chassis, turn ON the last chassis in the system followed by the
penultimate, etc, and nally turn ON the external controller or chassis containing the system controller.
9. For Pickering Interfaces modular LXI installation there is no requirement to use any particular power up
sequence.