Pickering 40-184A User manual

pickeringtest.com
Issue 2.1 August 2023
40-184A/185A User Manual
PXI 25 A & 1.5 A Solid State SPST Switch Modules

Page (II) 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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)
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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) 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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)
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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
Specication 40-184A ...........................................................1.1
Specication 40-185A ...........................................................1.4
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 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
Switching System Test Tools ...............................................7.1
Relay Lookup Tables.............................................................7.1
Appendix A
Interlock Connector Wiring ........................................................A.1
CONTENTS

Page (VI) 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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THIS PAGE INTENTIONALLY BLANK

Page (VII)
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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) 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering SECTION 1 - TECHNICAL SPECIFICATION
SECTION 1 - TECHNICAL SPECIFICATION
A4
C4
A3
C3
A2
C2
A1
C1
A6
C6
A5
C5
A3
C3
A2
C2
A1
C1
40-184A-001 Solid State
Switch - 6 x SPST
40-184A-002 Solid State
Switch - 3 x SPST
3-Channel & 6-Channel Solid State SPST Switch
Modules with Optional Hardware Interlock
Supported by eBIRST
eBIRST switching system test tools simplify switching
system fault-finding by quickly testing the system and
graphically identifying the faulty relay.
For more information go to: pickeringtest.com/ebirst
y6 x SPST Switches in 2 PXI Slots
y3 x SPST Switches in 1 PXI Slot
yAvailable With Optional Hardware Interlock
y25 A Rating at 100 V
yVery High Hot Switch Capacity
yVery High Inrush Current Rating
yFast Operating Speed
yLong Service Life
yDrivers Supplied for Windows and Linux, Plus
Support for Real-time Systems
ySupported by PXI or LXI Chassis
ySupported by
eBIRST ™
y3 Year Warranty
The 40-184A has 6 off high current SPST switches in two PXI
slots or 3 off high current SPST switches in one PXI slot. Each
SPST switch uses a fully isolated solid state relay which offers
fast operation under hot switching conditions and high inrush
current with no operational life degradation.
The SPST switches can carry 25 A of continuous current and
switch up to 100 V. They can sustain inrush current of up to 90 A.
Since the switch is polarity insensitive, AC or DC signals can be
switched.
The 40-184A is particularly suited to automotive and aerospace
applications where the switching of high capacity loads is
required. The module is supplied with a comprehensive package
of drivers, including support for selected RT operating systems.
pickeringtest.com
40-184A
PXI 25 A Solid State SPST Switch Modules
Issue 2.0 June 2023

Page 1.2 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering
SECTION 1 - TECHNICAL SPECIFICATION
Operating/Storage Conditions
Operating Temperature:
Humidity:
Altitude:
0 °C to +55 °C
Up to 90 % non-condensing
5000 m
Storage Temperature:
Humidity:
Altitude:
-20 °C to +75 °C
Up to 90 % non-condensing
15000 m
Hardware Interlock
The 40-184A modules are available with an optional
hardware interlock. The interlock, when activated,
will return all relays to their default unpowered
state (assuming the relays 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.
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
Relays
Interlock Signal Routing Diagram for 40-184A
Versions With Hardware Interlock Option
Interlock Connector
Switching Specification
Switch Type Solid State MOSFET
Default Relay State: Open with or without power
applied
Max Switch Voltage:
Continuous Switch Current:
Peak Current:
±100 V* (DC or AC peak)†
25 A, all channels
simultaneously
90 A for 200 µs
Max Total Module Current: 6 channels each carrying 25 A
Initial On Path Resistance:
Leakage Current:
<40 mΩ at 25 °C typical
<1µA at 25 °C
Rise/Fall Time:
Operate Time:
Maximum Operating Speed:
<5 µs typical
20 µs
1845 cycles/sec
(100
VDC, 1.3A)
1848 cycles/sec
(25 VDC, 25A)
Expected Life (operations): Indefinite when used within
ratings
* 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
300 mA 550 mA 0 0
Mechanical Characteristics
40-184A-001: Double slot 3U PXI (CompactPCI card).
40-184A-002: 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 connectors, for pin outs refer to the operating manual.
• 40-184A-001: 2 x male 8-pin power D-Type connectors.
• 40-184A-002: 1 x male 8-pin power D-Type connector.
• Interlock: 1 x 4-pin female 00 series connector*
(40-184A versions with hardware interlock option)
*Mating half supplied when hardware interlock option ordered,
to be wired by end user.
40-184A
pickeringtest.com Page 2
Specifications

Page 1.3
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering SECTION 1 - TECHNICAL SPECIFICATION
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. For more information go to:
pickeringtest.com/ebirst
Product Test Tool Adaptor Termination
40-184A-00x 93-005-001 93-005-236 93-012-103
Interlock Connectors
For modules with hardware interlock option (40-184A-00x-HI)
spare/replacement connectors can be ordered.
Product Description
44-961-040 Connector with internal link
44-960-040 Connector only, no internal wiring
(replacing that supplied with the module)
Mating Connectors & Cabling
For a complete list of connection accessories and
documentation for the 40-184A module, please refer to our
8-pin Power D-type datasheet (90-012D).
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.
Product Order Codes
PXI Solid State Switch:
6-Channel, 25 A, 100 V, SPST
3-Channel, 25 A, 100 V, SPST
40-184A-001
40-184A-002
PXI Solid State Switch, Hardware Interlock:
6-Channel, 25 A, 100 V, SPST
3-Channel, 25 A, 100 V, SPST
40-184A-001-HI
40-184A-002-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 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.
40-184A
pickeringtest.com Page 3
Ordering Information

Page 1.4 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering
SECTION 1 - TECHNICAL SPECIFICATION
A4
C4
A3
C3
A2
C2
A1
C1
A6
C6
A5
C5
A3
C3
A2
C2
A1
C1
40-185A-001 Solid State
Switch - 6 x SPST
40-185A-002 Solid State
Switch - 3 x SPST
3-Channel & 6-Channel Solid State SPST Switch
Modules with Optional Hardware Interlock
Supported by eBIRST
eBIRST switching system test tools simplify switching
system fault-finding by quickly testing the system and
graphically identifying the faulty relay.
For more information go to: pickeringtest.com/ebirst
y6 x SPST Switches in 2 PXI Slots
y3 x SPST Switches in 1 PXI Slot
yAvailable With Optional Hardware Interlock
y1.5 A Rating at 400 V
yVery High Hot Switch Capacity
yVery High Inrush Current Rating
yFast Operating Speed
yLong Service Life
yDrivers Supplied for Windows and Linux, Plus
Support for Real-time Systems
ySupported by PXI or LXI Chassis
ySupported by
eBIRST ™
y3 Year Warranty
The 40-185A has 6 off high current SPST switches in two PXI
slots or 3 off high current SPST switches in one PXI slot. Each
SPST switch uses a fully isolated solid state relay which offers
fast operation under hot switching conditions and high inrush
current with no operational life degradation.
The SPST switches can carry 1.5 A of continuous current and
switch up to 400 V. They can sustain inrush currents in excess
of 20 A. Since the switch is polarity insensitive, AC or DC signals
can be switched.
The 40-185A is particularly suited to automotive and aerospace
applications where the switching of high capacity loads is
required. The module is supplied with a comprehensive package
of drivers, including support for selected RT operating systems.
pickeringtest.com
40-185A
PXI 1.5 A Solid State SPST Switch Modules
Issue 2.0 June 2023

Page 1.5
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering SECTION 1 - TECHNICAL SPECIFICATION
Operating/Storage Conditions
Operating Temperature:
Humidity:
Altitude:
0 °C to +55 °C
Up to 90 % non-condensing
5000 m
Storage Temperature:
Humidity:
Altitude:
-20 °C to +75 °C
Up to 90 % non-condensing
15000 m
Hardware Interlock
The 40-185A modules are available with an optional
hardware interlock. The interlock, when activated,
will return all relays to their default unpowered
state (assuming the relays 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.
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
Relays
Interlock Signal Routing Diagram for 40-185A
Versions With Hardware Interlock Option
Interlock Connector
Power Requirements
+3.3 V +5 V +12 V -12 V
100 mA 560 mA 0 0
Switching Specification
Switch Type Solid State MOSFET
Max Switch Voltage:
Continuous Switch Current:
Peak Current:
±400 V* (DC or AC peak)†
1.5 A
20 A for 200 µs
Max Total Module Current: 6 channels each carrying 1.5 A
Initial On Path Resistance: 1.8 Ω at 25 °C typical
Rise/Fall Time:
Operate Time:
Recommended Maximum
Cycle Rate (on, then off):
<5 µs typical
20 µs
10 operations/sec
Expected Life (operations): Indefinite when used within
ratings
* 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.
Mechanical Characteristics
40-185A-001: Double slot 3U PXI (CompactPCI card).
40-185A-002: 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 connectors, for pin outs refer to the operating
manual.
• 40-185A-001: 2 x male 8-pin power D-Type connectors.
• 40-185A-002: 1 x male 8-pin power D-Type connector.
• Interlock: 1 x 4-pin female 00 series connector*
(40-185A versions with hardware interlock option)
*Mating half supplied when hardware interlock option
ordered, to be wired by end user.
40-185A
pickeringtest.com Page 2
Specifications

Page 1.6 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering
SECTION 1 - TECHNICAL SPECIFICATION
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. For more information go to:
pickeringtest.com/ebirst
Product Test Tool Adaptor Termination
40-185A-00x 93-005-001 93-005-236 93-012-103
Interlock Connectors
For modules with hardware interlock option (40-185A-00x-HI)
spare/replacement connectors can be ordered.
Product Description
44-961-040 Connector with internal link
44-960-040 Connector only, no internal wiring
(replacing that supplied with the module)
Mating Connectors & Cabling
For a complete list of connection accessories and
documentation for the 40-185A module, please refer to our
8-pin Power D-type datasheet (90-012D).
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.
Product Order Codes
PXI Solid State Switch:
6-Channel, 1.5 A, 400 V, SPST
3-Channel, 1.5 A, 400 V, SPST
40-185A-001
40-185A-002
PXI Solid State Switch, Hardware Interlock:
6-Channel, 1.5 A, 400 V, SPST
3-Channel, 1.5 A, 400 V, SPST
40-185A-001-HI
40-185A-002-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 reed types
• Mixture of reed 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.
40-185A
pickeringtest.com Page 3
Ordering Information

Page 2.1
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering SECTION 2 - TECHNICAL DESCRIPTION
SECTION 2 - TECHNICAL DESCRIPTION
FUNCTIONAL DESCRIPTION
Figure 2.1 - 25A & 1.5A Solid State SPST
Switches 40-184A-001 & 40-185A-001:
Functional Block Diagram
Note: the 40-184A-002 & 40-185A-002
(3xSPST) are tted with only one daughter
board.
A functional block diagram is provided in Figure 2.1. The Solid State SPST Switch Module is powered by +5V and
+3.3V inputs via Compact PCI connector J1. The interface to the user test equipment is via the front panel mounted
8-pin power D-type connectors. The module comprises a mother and two daughter PCBs which are mounted together
in a sandwich arrangement. The inner daughterboard is tted with the solid-state relays and associated driving
circuit for switching channels 1, 2 and 3. The outer daughterboard is identical to the inner and has the switching
circuit for channels 4, 5 and 6. The relays are energised via control signals from relay drivers on the daughterboards
which are fed with serial data from the control logic on the motherboard. The control logic is addressed by PCI bridge
U1 to output the required signal. PCI Bridge U1 is an FPGA which is congured by EEPROM U2.
Mother Board
8-pin Male High Power
D-type Connector
PXI Solid State
Switch Module 40-184A/185A
Relay
Drivers
U19-20 Terminating
Resistors
R1-12
PCI Bridge U1
Module
Configuration
Memories
PCI Bridge
Configuration
& Auxiliaries
GND
Compact PCI Bus
Connector J1
+5V
+3.3V
Logic
Control
U5-6
Interlock
Connector
Hardware
Interlock
Circuit
(Optional)
8-pin Male High Power
D-type Connector
Relay
Drivers
U19-20
Daughter Board 1
Channels 1-3
Daughter Board 2
Channels 4-6
Solid State
Relays
RL1-2,
RL7-8,
RL13-14
Solid State
Relays
RL1-2,
RL7-8,
RL13-14
6x SPST
Switches
Fitted to 3 & 6
Channel Versions
Fitted to 6 Channel
Versions Only
3x SPST
Switches

Page 2.2 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering
SECTION 2 - TECHNICAL DESCRIPTION
HARDWARE INTERLOCK
The 40-184A-00x-HI and 40-185A-00x-HI modules have an interlock feature that can be used to return the relays
(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.
Note: The mating half to the hardware interlock connector is supplied with the module in an unwired state,
the user must implement the link connections as detailed in this section to permit operation of the module.
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 RELAYS 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 relays on the module. If the Enable pin is allowed to be set low then the module will continue to
disable the relay 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 relay 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 40-184A/185A 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 relays 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 relays 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
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering SECTION 2 - TECHNICAL DESCRIPTION
Figure 2.2 - All 40-184A/185A-00x-HI Modules Enabled by a Common Signal
Figure 2.3 - 40-184A/185A-00x-HI Modules Enabled by a Master Module
Figure 2.4 - Each 40-184A/185A-00x-HI Module Enabled Independently
Figure 2.5 - 40-184A/185A-00x-HI Module Enables Daisy-Chained From a Master
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
To Other Modules With Hardware Interlock
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
Master
Module
With
Hardware
Interlock
To Other Modules With Hardware Interlock
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Module
With
Hardware
Interlock
Status
+3.3V
PXI Gnd
Enable
Status
+3.3V
PXI Gnd
Master
Module
With
Hardware
Interlock
To Other Modules With Hardware Interlock

Page 2.4 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
pickering
SECTION 2 - TECHNICAL DESCRIPTION
THIS PAGE INTENTIONALLY BLANK

Page 3.1
25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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 25A & 1.5A SOLID STATE SPST SWITCH MODULES 40-184A/185A
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.