Pickering 50-110A User manual

pickeringtest.com Issue 2.6, June 2023
PCI Reed Relay Card
50-110A/115A User Manual

Page (ii)
© 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.
FM38792

Page (iii)
Worldwide Technical Support and Product Information
Pickering Interfaces Headquarters
Stephenson Road, Clacton-on-Sea, CO15 4NL United Kingdom
Tel: [phone]
e-mail: [email protected]
USA
Tel: (West) [phone]
Tel: (East) [phone]
e-mail: [e-mail]
France
Tel [phone]
e-mail: [email protected]
Germany
Tel: [phone]
e-mail: [email protected]
Sweden
Tel: [phone]
e-mail: [email protected]
Czech Republic
Tel: [phone]
e-mail: [email protected]
China
Tel: [phone]
e-mail: [email protected]
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 fulfil 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.

Page (iv)
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
The following safety symbols may be used on the product and throughout the product documentation.
Product Safety

Page (v)
Contents
Copyright Statement........................................................................................................................................................(ii)
Technical Support and Warranty...................................................................................................................................(iii)
Product Safety...................................................................................................................................................................(iv)
Contents (this page).........................................................................................................................................................(v)
Warnings and Cautions...................................................................................................................................................(vi)
Section 1
Technical Specification....................................................................................................................................................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 PCI Cards.....................................................................................................4.1
Card Architecture: 50-110A-021/121 .....................................................................................................................4.2
Card Architecture: 50-115A-021/121 .....................................................................................................................4.4
Card Architecture: 50-115A-022/122 .....................................................................................................................4.6
Programming the Card..............................................................................................................................................4.8
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 Table: 50-110A-021/121 ..................................................................................................................7.1
Relay Lookup Table: 50-115A-021/121 ..................................................................................................................7.4
Relay Lookup Table: 50-115A-022/122 ..................................................................................................................7.6

Page (vi)
WARNING - Hazardous Environments Symbol
This product is not specifically 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.
!
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:
• 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.
• 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.
• Outer clothing worn must be unable to generate static charges.
• Printed Circuit Boards (PCBs) fitted with these devices must be stored and transported in anti-static bags.
Warnings & Cautions
WARNING - Danger of Electric Shock Symbol
This card may contain hazardous voltages. Before removing the card from the rack remove all supplies and
disconnect user I/O signals.
Unused slots in the PC chassis are populated with blanking plates to prevent access to user I/O signals that may be
present. 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 card must not be used for the switching of Mains Circuits. For the switching of voltages up to the module’s full
specification, 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 classified 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.
PCI Switching
Card
Device
Under Test
Power
Supply
Power
Supply
Host Chassis
Secondary Circuit
Mains
Circuit
Mains
Circuit
Mains/Factory
Safety Ground

Page (vii)
CAUTION - Product Documentation Symbol
Suitably qualified & 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 authorized personnel.
• For suitably equipped products in the event of an emergency press the red “emergency stop” button situated on the front of the
unit.
Warnings & Cautions
!

Page 1.1 pickeringtest.com
Section 1 - Technical Specification
y25, 32, 50 or 64 Reed Relays Per Card
ySPST, DPST and SPDT Configurations
yRuthenium Reed Relays Suitable For Low Level Signals
yUses High Reliability Pickering Reed Relays For
Maximum Performance
yFast Operating Speed 500 µs Typical
ySwitch up to 150 VDC/100 VAC, 1 A with 10 W Max Power
yDrivers Supplied for Windows & Linux, Plus Support
for Real-time Systems
ySupported by eBIRST ™
y3 Year Warranty
The 50-110A/115A range of switching cards is available in
both Changeover (SPDT) and Normally Open (SPST & DPST)
configurations. Connections are made via a front panel 200-pin
female connector.
General purpose reed relays are suitable for the construction
of small switching networks, for switching larger relays or for
operating external devices (e.g. lamps, solenoids etc.).
All of the reed relays used in our PCI cards are manufactured
by our Relay Division. Pickering reed relays offer very high
reliability (over 108 operations) with maximum switching
performance, especially for low level signals.
Supported by eBIRST
eBIRST test tools simplify switching fault-finding by quickly
testing the system and graphically identifying the faulty relay.
For more information go to: pickeringtest.com/ebirst
Range Description:
• 50-110A-x21 32 or 64 SPDT Reed Relays.
• 50-115A-x21 32 or 64 SPST Reed Relays.
• 50-115A-x22 25 or 50 DPST Reed Relays.
B32
A32
C32
A32
C32
A25.2
C25.2
A25.1
C25.1
B1
A1
C1
A1.2
C1.2
A1.1
C1.1
A1
C1
A2
C2
B64
A64
C64
B1
A1
C1
B2
A2
C2
A64
C64
A1
C1
A2
C2
A3
C3
A50.2
C50.2
A50.1
C50.1
A1.2
C1.2
A1.1
C1.1
50-110A-021
32xSPDT
50-110A-121
64xSPDT
50-115A-021
32xSPST
50-115A-121
64xSPST
50-115A-022
25xDPST
50-115A-122
50xDPST
Front Panel Connector
This product is based on the obsolete Molex LFH series connector
that has been superseded by a Pickering commissioned form,
fit, function equivalent. The new connector series is 100%
compatible with the Molex connectors allowing either gender of
Pickering connector to mate with the corresponding Molex part
without issue.
pickeringtest.com
50-110A/115A
PCI Reed Relay Card
Issue 3.0 April 2023

Page 1.2 pickeringtest.com
Section 1 - Technical Specification
Relay Type
The 50-110A & 50-115A are fitted with high quality ruthenium
reed relays. These offer very long life with good low level
switching performance and excellent contact resistance
stability. Spare reed relays are built onto the circuit board to
allow easy maintenance with minimum downtime.
All reed relays are manufactured by our Relay Division, for
more information visit: pickeringrelay.com
Switching Specification
Switch Type: Ruthenium Reed
Max Switching Voltage: 150 VDC/100 VAC (50-110A)*
100 VDC/70 VAC (50-115A)*
Max Power:
Max Switch Current:
Max Carry Current:
3 W (50-110A)
10 W (50-115A)
0.25 A (50-110A)
1 A (50-115A)
1 A
On Path Resistance:
Off Path Resistance:
Thermal Offset:
<800 mΩ (400 mΩ typical)
>109 Ω
<20 µV (50-110A)
<30 µV (50-115A)
Typical Operate Time: 0.5 ms
Expected Life, low power:
Expected Life, full power:
>1x108 operations
>1x106 operations
* For full voltage rating, signal sources must be fully isolated
from mains supply and safety earth.
Power Requirements
+3.3 V +5 V +12 V -12 V
200 mA 400 mA Max 0 0
Mechanical Characteristics
Single slot short PCI format.
3D models for all versions in a variety of popular file formats
are available on request.
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
PCI Compliance
The 50-110A/115A range complies with the PCI Specification
2.0 (issued Feb 2004).
Signalling Environment: 33 MHz, 32-bit Universal
(+3.3 V or +5 V).
Safety & CE Compliance
All cards 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.
Connectors
Signals via a 200-pin female LFH* connector, for pin outs
please refer to the operating manual.
* LFH relates to the obsolete Molex connector series and is
retained for continuity, products will be fitted with a form, fit,
function Pickering equivalent connector that is intermateable
with the original Molex parts.
50-110A/115A
pickeringtest.com Page 2
Specifications

Page 1.3 pickeringtest.com
Section 1 - Technical Specification
Product Order Codes
32 x SPDT, Ruthenium Reed Relays
64 x SPDT, Ruthenium Reed Relays
50-110A-021
50-110A-121
32 x SPST, Ruthenium Reed Relays
64 x SPST, Ruthenium Reed Relays
25 x DPST, Ruthenium Reed Relays
50 x DPST, Ruthenium Reed Relays
50-115A-021
50-115A-121
50-115A-022
50-115A-122
Product Customization
Pickering PCI cards 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 relay types
• Mixture of reed 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.
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
50-110A/115A 93-002-001 Not Required
Spare Relay Kits
Kits of replacement relays are available for the majority of
Pickering’s PXI switching products, simplifying servicing and
reducing down-time.
Product Relay Kit
50-110A-021/121
50-115A-021/121
50-115A-022/122
91-100-026
91-100-048
91-100-062
For further assistance, please contact your local Pickering
sales office.
Mating Connectors & Cabling
For connection accessories for the 50-110A/115A range
please refer to the 90-002D 200-pin LFH Connector
Accessories data sheet where a complete list and
documentation can be found for accessories, or refer to the
Connection Solutions catalog.
Pickering can supply mating 200-pin connectors and cable
assemblies to enable easy integration of the 50-110A &
50-115A series of relay cards
50-110A/115A
pickeringtest.com Page 3
Ordering Information

Page 2.1 pickeringtest.com
Section 2 - Technical Description
Functional Description
Functional block diagrams are provided in Figures 2.1 and 2.2. The Reed Relay Card is powered by +3.3 V and +5 V inputs via
the PCI edge connector. The interface to the user test equipment is via the front panel mounted 200-pin LFH connector, J1.
The module comprises a PCB populated with up to 64 reed relays, depending on the module type. The relays are energized
via control signals from relay drivers U8 to U11. The relay driver is addressed by PCI bridge U1 to output the required
signal. Module configuration is determined by data stored in EEPROM U7. PCI Bridge U1 is configured by EEPROM U2.
Relays RL1-64
Front Panel Connector J2
200-pin Female LFH Connector
Relay
Drivers
U8-11
Card
Configuration
U7
PCI Bridge
Configuration
U2
PCI Bridge U1
+3.3V
GND
PCI Bus Edge Connector J1
PCI REED RELAY CARD 50-110A-021/121 & 50-115A-021/121
+5V
32xSPDT, 64xSPDT, 32xSPST
or 64xSPST Reed Relays
Figure 2.1 - Reed Relay Cards 50-110A-021, 50-110A-121, 50-115A-021 & 50-115A-121:
Functional Block Diagram
Relays RL1-50
Front Panel Connector J2
200-pin Female LFH Connector
Relay
Drivers
U8-11
Card
Configuration
U7
PCI Bridge
Configuration
U2
PCI Bridge U1
+3.3V
GND
PCI Bus Edge Connector J1
PCI REED RELAY CARD 50-115A-022/122
+5V
25xDPST or 50xDPST
Reed Relays
Figure 2.2 - Reed Relay Cards 50-115A-022 & 50-115A-122:
Functional Block Diagram

Page 3.1 pickeringtest.com
Section 3 - Installation
kg
Pre-operation Checks (Unpacking)
1. Check the card 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 card(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 card(s) is of flat and solid construction to withstand and support
the combined weight of the PC chassis and cards.
!
Refer to the Warnings and Cautions at the front of this manual
Modular products require installation in a suitable chassis. The card is designed for indoor use only.
Figure 3.1 - Inserting a PCI Card into a PC Chassis

Page 3.2 pickeringtest.com
Section 3 - Installation
Software Installation
First install the appropriate Pickering PCI switch card drivers by running the installer program Setup.exe (provided in a compressed
zip file), 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 file containing additional installation information. A single installation
covers all Pickering switching and simulation PCI, PXI and PXIe products.
When installation completes, the installed drivers’ ReadMe file 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)
The PCI card must be electrically installed in accordance with local regional electrical codes by a qualified engineer.
The PC chassis must be grounded.
Electrostatic discharge can damage the components on the card and in the chassis. To avoid such damage in handling the board
refer to page vii.
Ensure that there is adequate ventilation.
The card 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 free PCI slot in the host system.
3. Remove the blanking plate for the chosen slot and retain the fixing screw.
4. Carefully remove the card from its anti-static bag and insert the card’s edge connector into the free slot in the host system
(refer to Figure 3.1).
5. Ensure the card is fully inserted into the edge connector and the front panel is fully in contact with the back of card aperture in
the host chassis.
6. Use the fixing screw to secure the front panel of the card to the host chassis’ mounting rail.
7. Replace the chassis cover(s).
8. Power-up the host system.

Page 3.3 pickeringtest.com
Section 3 - Installation
Figure 3.3 - General Soft Front Panel Selector
Testing Operation
After installation of the hardware and Pickering PXI Driver software package start the General Soft Front Panel (GSFP) using the
desktop icon or via the Start menu (Start Menu-> Pickering Interfaces Ltd -> General Soft Front Panel).
A selector panel will appear, listing all installed Pickering PCI, PXI/PXIe or LXI switch cards and resistor cards. Click on the card you
wish to control, and a graphical control panel is presented allowing operation of the card. Panels can be opened simultaneously for
all the installed cards.
More details how to use the GSFP can be found in the manual, via menu Help\Manual.
Figure 3.2 - General Soft Front Panel Icon

Page 4.1 pickeringtest.com
Section 4 - Programming
Programming options for Pickering Interfaces PCI Cards
For information on the installation and use of drivers and the programming of Pickering’s products in various software
environments, please refer to the Software User Manual.
This is available as a download from:
pickeringtest.com/support/software-drivers-and-downloads
Also, it can be accessed from the DVD supplied with the product:
<DVD_DRIVE>\downloads\Documentation\Software-Manual.pdf

Page 4.2 pickeringtest.com
Section 4 - Programming
Card Architecture - 50-110A-021/121
One sub-unit is used to control all the card’s relays as shown in Table 4.1. Enabling a particular bit opens the C to B signal
path and closes the C to A signal path.
The 50-110A-021 is an array of 32, and the 50-110A-121 is an array of 64 uncommitted changeover relays. In the
default state, all signal paths are between the C terminal and the corresponding B terminal. Energizing a particular
relay disconnects the B terminal and creates a signal path between the C and A terminals. The relay card’s switching
architectures are shown in their default state in the diagram below:
50-110A-021 (32 x SPDT) 50-110A-121 (64 x SPDT)
B1
A1
C1
B2
A2
C2
B32
A32
C32
B2
A2
C2
B3
A3
C3
B64
A64
C64
B1
A1
C1
TABLE 4.1 - Sub-Unit/Bit Usage for 50-110A-021/121
Sub-Unit Bit 50-110A-021 Signal Path
(with relay energized)
50-110A-121 Signal Path
(with relay energized)
1 1 C1 to A1 C1 to A1
1 2 C2 to A2 C2 to A2
1 3 C3 to A3 C3 to A3
1 4 C4 to A4 C4 to A4
1 5 C5 to A5 C5 to A5
1 6 C6 to A6 C6 to A6
1 7 C7 to A7 C7 to A7
1 8 C8 to A8 C8 to A8
1 9 C9 to A9 C9 to A9
1 10 C10 to A10 C10 to A10
1 11 C11 to A11 C11 to A11
1 12 C12 to A12 C12 to A12
1 13 C13 to A13 C13 to A13
1 14 C14 to A14 C14 to A14
1 15 C15 to A15 C15 to A15

Page 4.3 pickeringtest.com
Section 4 - Programming
TABLE 4.1 - Sub-Unit/Bit Usage for 50-110A-021/121 (Continued)
Sub-Unit Bit 50-110A-021 Signal Path
(with relay energized)
50-110A-121 Signal Path
(with relay energized)
1 16 C16 to A16 C16 to A16
1 17 C17 to A17 C17 to A17
1 18 C18 to A18 C18 to A18
1 19 C19 to A19 C19 to A19
1 20 C20 to A20 C20 to A20
1 21 C21 to A21 C21 to A21
1 22 C22 to A22 C22 to A22
1 23 C23 to A23 C23 to A23
1 24 C24 to A24 C24 to A24
1 25 C25 to A25 C25 to A25
1 26 C26 to A26 C26 to A26
1 27 C27 to A27 C27 to A27
1 28 C28 to A28 C28 to A28
1 29 C29 to A29 C29 to A29
1 30 C30 to A30 C30 to A30
1 31 C31 to A31 C31 to A31
1 32 C32 to A32 C32 to A32
1 33 — C33 to A33
1 34 — C34 to A34
1 35 — C35 to A35
1 36 — C36 to A36
1 37 — C37 to A37
1 38 — C38 to A38
1 39 — C39 to A39
1 40 — C40 to A40
1 41 — C41 to A41
1 42 — C42 to A42
1 43 — C43 to A43
1 44 — C44 to A44
1 45 — C45 to A45
1 46 — C46 to A46
1 47 — C47 to A47
1 48 — C48 to A48
1 49 — C49 to A49
1 50 — C50 to A50
1 51 — C51 to A51
1 52 — C52 to A52
1 53 — C53 to A53
1 54 — C54 to A54
1 55 — C55 to A55
1 56 — C56 to A56
1 57 — C57 to A57
1 58 — C58 to A58
1 59 — C59 to A59
1 60 — C60 to A60
1 61 — C61 to A61
1 62 — C62 to A62
1 63 — C63 to A63
1 64 — C64 to A64

Page 4.4 pickeringtest.com
Section 4 - Programming
Card Architecture - 50-115A-021/121A
One sub-unit is used to control all the card’s relays as shown in Table 4.2. Enabling a particular bit closes the C to A signal
path.
50-115A-021 (32 x SPST)
The 50-115-021 is an array of 32, and the 50-115A-121 is an array of 64 uncommitted SPST relays. In the default state, all
signal paths are open. Energizing a particular relay creates a signal path between the C and A terminals. The relay card’s
switching architectures are shown in their default state in the diagram below:
50-115A-121 (64 x SPST)
A32
C32
A3
C3
A2
C2
A1
C1
A63
C63
A4
C4
A3
C3
A2
C2
A1
C1
A64
C64
Sub-Unit Bit 50-115A-021 Signal Path
(with relay energized)
50-115A-121 Signal Path
(with relay energized)
1 1 C1 to A1 C1 to A1
1 2 C2 to A2 C2 to A2
1 3 C3 to A3 C3 to A3
1 4 C4 to A4 C4 to A4
1 5 C5 to A5 C5 to A5
1 6 C6 to A6 C6 to A6
1 7 C7 to A7 C7 to A7
1 8 C8 to A8 C8 to A8
1 9 C9 to A9 C9 to A9
1 10 C10 to A10 C10 to A10
1 11 C11 to A11 C11 to A11
1 12 C12 to A12 C12 to A12
1 13 C13 to A13 C13 to A13
1 14 C14 to A14 C14 to A14
1 15 C15 to A15 C15 to A15
TABLE 4.2 - Sub-Unit/Bit Usage for 50-115A-021/121

Page 4.5 pickeringtest.com
Section 4 - Programming
TABLE 4.2 - Sub-Unit/Bit Usage for 50-115A-021/121 (Continued)
Sub-Unit Bit 50-115A-021 Signal Path
(with relay energized)
50-115A-121 Signal Path
(with relay energized)
1 16 C16 to A16 C16 to A16
1 17 C17 to A17 C17 to A17
1 18 C18 to A18 C18 to A18
1 19 C19 to A19 C19 to A19
1 20 C20 to A20 C20 to A20
1 21 C21 to A21 C21 to A21
1 22 C22 to A22 C22 to A22
1 23 C23 to A23 C23 to A23
1 24 C24 to A24 C24 to A24
1 25 C25 to A25 C25 to A25
1 26 C26 to A26 C26 to A26
1 27 C27 to A27 C27 to A27
1 28 C28 to A28 C28 to A28
1 29 C29 to A29 C29 to A29
1 30 C30 to A30 C30 to A30
1 31 C31 to A31 C31 to A31
1 32 C32 to A32 C32 to A32
1 33 — C33 to A33
1 34 — C34 to A34
1 35 — C35 to A35
1 36 — C36 to A36
1 37 — C37 to A37
1 38 — C38 to A38
1 39 — C39 to A39
1 40 — C40 to A40
1 41 — C41 to A41
1 42 — C42 to A42
1 43 — C43 to A43
1 44 — C44 to A44
1 45 — C45 to A45
1 46 — C46 to A46
1 47 — C47 to A47
1 48 — C48 to A48
1 49 — C49 to A49
1 50 — C50 to A50
1 51 — C51 to A51
1 52 — C52 to A52
1 53 — C53 to A53
1 54 — C54 to A54
1 55 — C55 to A55
1 56 — C56 to A56
1 57 — C57 to A57
1 58 — C58 to A58
1 59 — C59 to A59
1 60 — C60 to A60
1 61 — C61 to A61
1 62 — C62 to A62
1 63 — C63 to A63
1 64 — C64 to A64

Page 4.6 pickeringtest.com
Section 4 - Programming
Card Architecture - 50-115A-022/122
One sub-unit is used to control all the card’s relays as shown in Table 4.3. Enabling a particular bit closes both C to A
signal paths of the corresponding channel.
50-115A-022 (25 x DPST)
The 50-115A-022 is an array of 25, and the 50-115A-122 is an array of 50 uncommitted DPST relays. In the default state, all
signal paths are open. Energizing a particular relay creates a signal path between the C and A terminals of both poles of
the corresponding channel. The relay card’s switching architectures are shown in their default state in the diagram below:
50-115A-122 (50 x DPST)
A1.2
C1.2
A1.1
C1.1
A2.2
C2.2
A2.1
C2.1
A25.2
C25.2
A25.1
C25.1
A2.2
C2.2
A2.1
C2.1
A3.2
C3.2
A3.1
C3.1
A50.2
C50.2
A50.1
C50.1
A1.2
C1.2
A1.1
C1.1
Sub-Unit Bit 50-115A-022 Signal Path
(with relay energized)
50-115A-122 Signal Path
(with relay energized)
1 1 C1.1 to A1.1 & C1.2 to A1.2 C1.1 to A1.1 & C1.2 to A1.2
1 2 C2.1 to A2.1 & C2.2 to A2.2 C2.1 to A2.1 & C2.2 to A2.2
1 3 C3.1 to A3.1 & C3.2 to A3.2 C3.1 to A3.1 & C3.2 to A3.2
1 4 C4.1 to A4.1 & C4.2 to A4.2 C4.1 to A4.1 & C4.2 to A4.2
1 5 C5.1 to A5.1 & C5.2 to A5.2 C5.1 to A5.1 & C5.2 to A5.2
1 6 C6.1 to A6.1 & C6.2 to A6.2 C6.1 to A6.1 & C6.2 to A6.2
1 7 C7.1 to A7.1 & C7.2 to A7.2 C7.1 to A7.1 & C7.2 to A7.2
1 8 C8.1 to A8.1 & C8.2 to A8.2 C8.1 to A8.1 & C8.2 to A8.2
1 9 C9.1 to A9.1 & C9.2 to A9.2 C9.1 to A9.1 & C9.2 to A9.2
1 10 C10.1 to A10.1 & C10.2 to A10.2 C10.1 to A10.1 & C10.2 to A10.2
TABLE 4.3 - Sub-Unit/Bit Usage for 50-115A-022/122