Pickering 40-490 User manual

pickeringtest.com
Issue 6.4 February 2023
40-490/491 User Manual
PXI Opto-Isolated Digital I/O Module

Page (II) OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
Page (II) REED RELAY MODULE 40-110/115/120/125
pickering
© COPYRIGHT (2023) 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)
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
Page (III)
REED RELAY MODULE 40-110/115/120/125
pickering
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) OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
Page (IV) REED RELAY MODULE 40-110/115/120/125
pickering
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.

Page (V)
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
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
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 Modules ............4.1
Module Architecture - 40-490/491 ........................................4.2
Programming The Module ....................................................4.3
Section 5
Connector Information................................................................5.1
40-490 .....................................................................................5.1
40-491 .....................................................................................5.2
Section 6
Trouble Shooting .........................................................................6.1
Section 7
Maintenance Information............................................................7.1
Relay Lookup Tables.............................................................7.1
CONTENTS

Page (VI) OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
THIS PAGE INTENTIONALLY BLANK

Page (VII)
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
Page (VII)
2 AMP 1-POLE UHD MATRIX MODULES 40-575 / 576 / 577 / 578 / 579
pickering
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

Page (VIII) OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
Page (VIII) 2 AMP 1-POLE UHD MATRIX MODULES 40-575 / 576 / 577 / 578 / 579
pickering
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
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering SECTION 1 - TECHNICAL SPECIFICATION
SECTION 1 - TECHNICAL SPECIFICATION
pickeringtest.com
PXI Opto Isolated Digital I/O Module 40-490/491
ISSUE 8.0 APR 2018
• Digital I/O Module With Opto Isolation
• High Side Output Switches For Controlling
Common Negative Loads
• 32 Bits Out + 16 Bits In
• Suitable For Industrial Automation Applications,
e.g. Operating Pneumatic Valves, Power Relays,
etc.
• Operating Speed <10ms
• All I/O Ports Are Protected Against Damage
• VISA & Kernel Drivers Supplied for Windows
• Supported by PXI or LXI Chassis
• 3 Year Warranty
IN1
IN2
IN16
OUT32
OUT2
OUT1
The 40-490 Opto Isolated Digital
I/O Module
The 40-490/491 module is designed for applications requiring
optically isolated digital I/O, typically in industrial automation. The
module features 32 digital outputs and 16 digital inputs that can be
programmed by word or individual bit.
The 40-490’s input ports have a nominal logical threshold of 6V
while the 40-491’s thresholds are TTL compatible. Versions of each
module are offered with either an internal +5V supply (DC to DC
converter) for the isolated side or requiring an external +5V isolated
supply.
The 40-490/491 digital I/O module has many applications in
process control, sensing inputs, volt free contacts, product testing,
noise free inputs or for driving relays and solenoids.
40-490 Opto-Isolated Digital I/O Module Details
The 40-490 is intended for moderate speed input-output in
potentially noisy environments. All inputs and outputs share a
common negative ground, which is isolated to 500VDC from the
PXI chassis ground.

Page 1.2 OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
SECTION 1 - TECHNICAL SPECIFICATION
Opto Isolated Digital I/O – 40-490/491
pickeringtest.com
Specifications
Specification
Inputs
Type: Inputs are low pass ltered and clamped to
reject transients. The electrical time constant
at the inputs is approximately 3.5ms. Inputs
are pulled low, and present a load of greater
than 3.3KΩ to the source.
Input Threshold: 6V (40-490) or TTL (40-491).
Max Voltage*: The input connections can withstand the
application of voltages to 40V.
Read Time: 1ms typical excluding input lter settling
time.
Outputs
Switch Type: High side FET switch
Protection: Switch protected against overcurrent,
overvoltage, overtemperature and inductive
loading. Clamp diode limits voltage
excursion below negative voltage.
Switch Ratings
Voltage*:
Current:
+40V relative to negative output.
400mA for single output, 1A for any group of
8 outputs sharing power and return pins.
Write Time: 2ms typical excluding any external ltering.
Internal Isolated 5VDC supply (DC to DC Converter)
Type: Fully regulated, short-circuit protected.
Rating: 5VDC +/-2%. A maximum of 350mA may be
drawn externally.
External DC Voltage Versions
Requirement: 5VDC +/-5% at 50mA, isolated.
* For full voltage rating, signal sources must be fully isolated from
mains supply and safety earth.
Power Requirements
Power consumption from the 5V backplane supply is as follows:
Operating/Storage Conditions
Operating Conditions
Operating Temperature:
Humidity:
Altitude:
0°C to +55°C
Up to 90% non-condensing
5000m
Storage and Transport Conditions
Storage Temperature:
Humidity:
Altitude:
-20°C to +75°C
Up to 90% non-condensing
15000m
PXI & CompactPCI Compliance
The module is compliant with the PXI Specication 2.2. Local Bus,
Trigger Bus and Star Trigger are not implemented.
Uses a 33MHz 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.
+3.3V +5V +12V -12V
0 0.36A 0 0
Mechanical Characteristics
Single slot 3U PXI (CompactPCI card).
3D models for all versions in a variety of popular le formats are
available on request.
Connectors
PXI bus via 32-bit P1/J1 backplane connector.
Signals via front panel 68-pin female micro-D connector, for pin
outs please refer to the operating manual.
Custom options
Alternate values may be substituted in the input lter circuits to
obtain different lter or threshold characteristics.
Additional resistors may be tted to pull inputs up to a user-
supplied positive voltage.

Page 1.3
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering SECTION 1 - TECHNICAL SPECIFICATION
Opto Isolated Digital I/O – 40-490/491
pickeringtest.com
Ordering Information
Mating Connectors & Cabling
For connection accessories for the 40-490/491 please refer to the
90-015D 68-pin micro-D 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
Opto Isolated Digital I/O Module
With DC to DC Converter
No DC to DC Converter
40-490-001
40-490-002
Opto Isolated Digital I/O Module, TTL Input
With DC to DC Converter
No DC to DC Converter
40-491-001
40-491-002
Product Customization
Pickering PXI modules are designed and manufactured on our own
exible manufacturing lines, giving complete product control and
enabling simple customization to meet very specic requirements.
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 ofce to discuss.
DC-DC
converter
FET Output
Switch
Opto-isolation
Serial data
signals
Serial-to-parallel
converter
Isolated serial
data signals
One of 32
outputs
USERPWR
USERGND
LOAD1
+
-
40Vdc
max.
OUT1
Note: in model 40-490-002
the DC-DC converter is
omitted, and the isolated 5V
logic supply must be
sourced externally
(USER5V).
ISO5VOUT
40-490 Output Circuit Detail

Page 1.4 OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
SECTION 1 - TECHNICAL SPECIFICATION
Opto Isolated Digital I/O – 40-490/491
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 sister company, Pickering Electronics. 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) specication
• 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 1.5
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering SECTION 1 - TECHNICAL SPECIFICATION
Opto Isolated Digital I/O – 40-490/491
pickeringtest.com
Supporting Products & Software
© Copyright (2020) 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 specic 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 dening 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 specically for our PXI, PCI or LXI
products, these tools simplify switching system fault-nding 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, as well as complete product
catalogs and product reference maps to assist when looking for the switching, simulation and cable and connector 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 1.6 OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
SECTION 1 - TECHNICAL SPECIFICATION
THIS PAGE INTENTIONALLY BLANK

Page 2.1
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering SECTION 2 - TECHNICAL DESCRIPTION
SECTION 2 - TECHNICAL DESCRIPTION
FUNCTIONAL DESCRIPTION
A functional block diagram is provided in Figure 2.1. The Module is powered by a +5V input via Compact PCI
connector J1. The interface to the user test equipment is via the front panel mounted 68-pin micro-D connector, J2.
The module comprises a PCB populated with opto-isolators and control logic. The opto-isolators are powered via
an isolated supply, which is either provided on-board (40-490/491-001) are externally (40-490/491-002). Module
conguration is determined by data stored on EEPROM U7. PCI Bridge U1 is congured by EEPROM U2.
Figure 2.1 - Opto-Isolated Digital I/O Module: Functional Block Diagram
MODULE
CONFIGURATION
U7
PCI
BRIDGE
U1
PCI BRIDGE
CONFIGURATION
U2
TERMINATING
RESISTORS
R5 TO R16
COMPACT PCI BUS CONNECTOR J1
+5V
0V
CONTROL
REGISTER
U5
CONTROL
REGISTER
U6
OC6
OC1
OC2
OC3
OC4
OC5
OC7
OUTPUT
DRIVER
U8
SCHMITT
TRIGGER
U14
SCHMITT
TRIGGER
U13
SCHMITT
TRIGGER
U12
PARALLEL
TO SERIAL
CONVERTER
U10
PARALLEL
TO SERIAL
CONVERTER
U11
SCHMITT
TRIGGER
U9
DC/DC
CONVERTER
PS1
(40-490-001 ONLY)
OR EXTERNAL
POWER SUPPLY
68-Pin Micro-D Connector J2
OUTPUT
TRANSISTORS
Q1 TO Q32

Page 2.2 OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
SECTION 2 - TECHNICAL DESCRIPTION
DC-DC
converter
FET Output
Switch
Opto-isolation
Serial data
signals Serial-to-parallel
converter
Isolated serial
data signals
One of 32
outputs
USERPWR
USERGND
LOAD1
+
-40VDC max.
OUT1
Note: in model 40-490-002 the DC-DC converter
is omitted, and the isolated 5V logic supply must
be sourced externally (USER5V).
ISO5VOUT
Figure 2.2 - Opto-Isolated Digital I/O Module (40-490/491-001/002): Output Detail
LOAD1
POWER 1-8
POWER 9-16
POWER 17-24
POWER 25-32
RETURN 1-8
RETURN 9-16
RETURN 17-24
RETURN 25-32
+
-40VDC max.
OUT1
LOAD2
OUT2
LOAD3
OUT3
LOAD4
OUT4
LOAD5
OUT5
LOAD6
OUT6
LOAD7
OUT7
LOAD8
OUT8
LOAD9
OUT9
LOAD10
OUT10
LOAD11
OUT11
LOAD12
OUT12
LOAD13
OUT13
LOAD14
OUT14
LOAD15
OUT15
LOAD16
OUT16
LOAD17
OUT17
LOAD18
OUT18
LOAD19
OUT19
LOAD20
OUT20
LOAD21
OUT21
LOAD22
OUT22
LOAD23
OUT23
LOAD24
OUT24
LOAD25
OUT25
LOAD26
OUT26
LOAD27
OUT27
LOAD28
OUT28
LOAD29
OUT29
LOAD30
OUT30
LOAD31
OUT31
LOAD32
OUT32
(USERPWR)
(USERGND)
Figure 2.3 - Opto-Isolated Digital I/O Module (40-490/491-001/002): Load Connections

Page 2.3
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering SECTION 2 - TECHNICAL DESCRIPTION
Digital Inputs (Figure 2.4)
Up to 16 digital inputs are input via J2 and applied to Schmitt Triggers U12, U13 and U14. The digital inputs are
shaped and applied to parallel to serial converters U10 and U11. The outputs from the parallel to serial converters
are applied to opto-isolators OC6 and OC7 which pass the signals to Control Registers U5 and U6. The control
registers are addressed by PCI Bridge U1 to pass the signals to Compact PCI connector J1.
Digital Outputs (Figure 2.5)
Inputs applied to the module via backplane connector J1 are passed to Control Registers U5 and U6 via PCI Bridge
U1. PCI Bridge U1 addresses the control registers to output the required signals. The outputs from the U5 and U6
are applied to Opto-Isolators OC1, OC2, OC3, OC4 and OC5 and passed to a Schmitt Trigger U9. The schmitt
trigger shapes the signals and applies them to an Output Driver U8, which in turn drives output transistors Q1 to
Q32 to provide 32 digital outputs.
USERVPU
IN1A
(1 of 16 inputs)
IN1-4B
IN5-8B
IN9-12B
IN13-16B
Jumper
3K3
(optional)
Filter
Circuit
3K3
3K3
Filter and
Clamping
Circuit
Logic Signal
USERGND
Internal Isolated 5V
IN1A
(1 of 16 inputs)
IN1-4B
IN5-8B
IN9-12B
IN13-16B
10K
10K
Logic Signal
USERGND
40-490 Input Circuit
40-491 Input Circuit
0R Link (component refs W1 to W16)
Figure 2.4 - Input Circuits: 40-490 & 40-491

WARNING: For the 40-490-002 and 40-491-002 (not tted with the DC-DC converter), the module will not
function correctly and will not be recognised by the software drivers unless an external 5V logic supply is applied
to the USER5V input on the front panel connector.
Page 2.4 OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering
SECTION 2 - TECHNICAL DESCRIPTION
Semiconductor
Switch
OUT1
(1 of 32 outputs)
POWER 1-8
POWER 9-16
POWER 17-24
POWER 25-32
USERPWR
RETURN 1-8
RETURN 9-16
RETURN 17-24
RETURN 25-32
USERGND
Freewheel
Diode
Figure 2.5 - Output Circuit: 40-490 & 40-491

Page 3.1
OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
pickering SECTION 3 - INSTALLATION
Page 3.1
REED RELAY MODULE 40-110/115/120/125
pickering SECTION 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. Ensure that the designated area for the chassis containing the module is of at and solid construction to
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/LXI chassis. The module is designed for indoor use only.
Figure 3.1 - Installing the Module into a PXI/cPCI/LXI Chassis
PXI / LXI Chassis

Page 3.2 OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
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.