ADLINK Technology PXI-7931 User manual

PXI-7931
4x8 2-Wire Matrix Module
User’s Manual
Manual Rev.: Rev. 1.1
Date: February 8, 2020
Part Number: 50-17009-1010

Copyright © 2004, 2020 ADLINK Technology Inc. All Rights Reserved.
Revision History.
1.00
09-07-2004
Initial release
1.1
08-02-2020
Remove Star Trigger Out functionality
Disclaimer
The information in this document is subject to change without prior notice in
order to improve reliability, design, and function and does not represent a
commitment on the part of the manufacturer.
In no event will the manufacturer be liable for direct, indirect, special,
incidental, or consequential damages arising out of the use or inability to use
the product or documentation, even if advised of the possibility of such
damages.
This document contains proprietary information protected by copyright. All
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permission of the manufacturer.
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ADLINK Technology Inc. Other product names mentioned herein are used
for identification purposes only and may be trademarks and/or registered
trademarks of their respective companies.

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with the European Union's Restriction of Hazardous
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Table of Contents • i
Table of Contents
How to Use This Manual..............................................................ii
Chapter 1 Introduction ..............................................................1
1.1 Features.............................................................................1
1.2Applications........................................................................2
1.3 Specifications.....................................................................2
1.4 Software Support...............................................................3
Chapter 2 Installation ................................................................5
2.1 Contents.............................................................................5
2.2 Unpacking..........................................................................5
2.3 Mechanical Drawing...........................................................6
2.4 Installing the switch module into a PXI Platform................6
Chapter 3 Signal Connection....................................................9
3.1 PXI-7931 Topology ............................................................9
3.2 PXI-7931 Pin assignment & Description..........................10
3.3 TB-6231 Terminal Board..................................................11
Chapter 4 Operation Theorem................................................21
4.1 Hardware Block Diagram.................................................21
4.2 Operation Mode...............................................................22
4.3 Handshaking....................................................................22
4.4 Trigger Bus ......................................................................28
4.5Auxiliary Digital I/O...........................................................29
4.6 Hot-Swap .........................................................................30
4.7 Emergency Shutdown......................................................30
4.8 Watchdog Timer...............................................................31
Warranty Policy........................................................................33

How to Use This Manual
This User Manual is designed to assist users in the installation of the ADLINK
PXI-7931, 4x8 2-Wire Matrix PXI Switch module.
Chapter 1 Introduction
Gives an outline and overview of ADLINK switch modules’
features, specifications, and applications.
Chapter 2 Installation
Describes how to install a switch module into a PXI chassis. For
software library and utilities installation, please refer to the
Software Users’ Guide.
Chapter 3 Signal Connection
Shows the pin assignments and terminal board connection of the
switch module.
Chapter 4 Operation Theorem
Describes function blocks on ADLINK switch modules and
operation instructions.
ii • How to use this Manual

Introduction • 1
Introduction
ADLINK PXI-7931 is a matrix module with 32 cross-point 2-wire relays (DPDT,
2 Form C). The default configuration of the PXI-7931 is a 4-group 2x4 2-wire
matrix. With the termination board, TB-6231, users can flexibly choose one of
the configurations: one 4x8, two 4x4, one 2x16, two 2x8, and four 2x4. Any
contact of the PXI-7931 can connect to other contacts at the same bank,
individually, or in combination. The PXI-7931 matrix module simplifies wiring
and makes it easy to change the internal connection path.
The contact position of the relays can be changed either by direct software
commands or by following the instructions previously stored in the on-board
scan list. The scan list advances upon the trigger from external measurement
devices, such as a DMM. The scan list can also advance when the scan-delay
timer expires. PXI trigger functions are supported and software programmable.
Multiple modules can be synchronized without additional field wiring.
1.1 Features
•PXI specifications Rev. 2.0 compliant
•3U Eurocard form factor, CompactPCI compliant (PICMG 2.0R3.0)
•PICMG 2.1 R2.0 CompactPCI Hot-Swap specificationscompliant
•32 DPDT (2 Form C) non-latching relays
•Contact rating
•2A switching, 2Acarrying
•220VDC, 125VAC
•200 operations per second
•1k-sample scanlist for deterministic scanning
•Provides handshaking signals to trigger external instruments
•Programmable emergency shutdown function and Watchdog timer for
safety critical applications
•Eight auxiliary 3.3 V/TTL digital inputs/outputs with 5Vtolerance
•Supports PXI backplane triggers to synchronize multiple modules
•Fully software programmable
1

1.2 Applications
•Industrial ON/OFF control
•External high power relay driving and signal switching
•Laboratory automation
•Industrial automation
•Switch contact status sensing
•Limit switch monitoring
•Cooperating with other modules such as A/D and D/A peripherals to
implement a data acquisition and control system
1.3 Specifications
Relay Output
•Number of cross-points: 32 (2-wire)
•Relay type: DPDT (2 Form C), non-latching
•Switching capacity:
•Max. switching current: 2A
•Max. switching voltage: 220VDC, 125VAC
•Max. switching power: 60VA, 60W
•Failure rate: 10µA, 10mVDC
•Contact resistance: 100mΩ max.
•Relay set/reset time
•Operate time: 4msmax.
•Release time: 4msmax.
•Bounce time: 1ms max.
•Expected life:
•Mechanical life: 108operations min.
•Electrical life: 105operations min. (2A @ 30VDC, resistive load)
•Data transfer: Programmed I/O
Auxiliary Digital I/O
•Numbers of channel: 8inputs/outputs
•Compatibility: 3.3 V/TTL (5Vtolerant)
•Data transfers: programmed I/O
Handshaking Signals
•Programmable polarity
•Logic level: 3.3 V/TTL (5V tolerant)
•Trigger In source: AUX1, PXI trigger bus, PXI star trigger in
•Scanner Advanced destination: AUX0, PXI trigger bus
2 • Introduction

Introduction • 3
Safety functions
•Emergency shutdown
•Logic level: 3.3 V/TTL (5V tolerant)
•Active with logic low (for AUX2/SHDNn pin)
•Emergency shutdown sources: AUX2/SHDNn, PXI star trigger
input, PXI trigger bus
•Watchdog timer
•Base clock available: 10MHz, fixed
•Counter width: 32-bit
•Watchdog Timer Overflow sources: Onboard 32-bitwatchdog
timer, PXI star trigger input, PXI trigger bus
General Specifications
•I/O Connector: 62-pin D-submale
•Operating temperature: 0 to 55°C
•Storage temperature: -20 to 70°C
•Humidity: 5 to 95% non-condensing
•Power requirements (when all relays are activated simultaneously)
+5V +3.3V
1A 400mA
•Dimensions (not including connectors)
•160 mm x 100 mm
1.4 Software Support
ADLINK's ADL-SWITCH driver package is for Microsoft Windows operating
systems, including Windows 98/ME/NT/2000/XP.
The driver package also provides utilities to test your switch module, as well as
programming samples and source codes in Microsoft Visual Basic and Visual
C/C++.
For other operating systems, please contact ADLINK for more information.

4 • Introduction
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Installation • 5
Installation
This chapter describes the installation process for the ADLINK switch module.
Please read the contents of the package and the disassembling information
carefully as they are important in the implementation of the ADLINK switch
module.
2.1 Contents
The package consists of the following items in addition to the User Manual:
•PXI-7931, 4x8 2-Wire Matrix PXI Switch module
•This User Guide
•ADLINK Software CD
•ADL-Switch User’s Guide
If any of these items are missing or broken, please do not hesitate to contact
ADLINK or the dealer from whom the product was purchased. Keep the
shipping materials and carton for future storage or shipping.
2.2 Unpacking
ADLINK switch module contains sensitive electronic components that can be
easily damaged by static electricity. The switch module should be operated on a
grounded anti-static mat. It is strongly recommended that the operator wears an
anti-static wristband, grounded at the same point as the anti-staticmat.
Inspect the box for any obvious damage. Check the unit to ensure there are no
shipping and handling damages that may have occurred before proceeding.
After opening, remove the switch module and place it only on a grounded anti-
static surface component side up.
Note: Do not apply power to the module if it has been damaged.
2

6 • Installation
You are now ready to install the PXI-7931.
2.3 Mechanical Drawing
Figure 1: ADLINK Switch Module
ADLINK switch module is packaged in a Eurocard form factor compliant with
PXI Specifications measuring 160 mm in length and 100 mm in height (not
including connectors). A 62-pin connector is located at the front panel for wiring
purposes and the J1/J2 IEC connectors in the rear are used to link the chassis
backplane. With its modular, rugged, and high shock resistant mechanical
features, the switch module functions exceptionally well in any harsh
environment application.
2.4 Installing the switch module into a PXI Platform
To insert the ADLINK PXI switch module, align the module’s edge with the card
guide in the PXI chassis. Slide the switch module into the chassis, until
resistance is felt from the PXI connector. Push the ejector upwards and fully
insert the switch module into the chassis. Once inserted, a “click” can be heard
from the ejector latch. Tighten the screws on the front panel.

Installation • 7
Figure 2: Installing the switch module into a PXI platform

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8 • Installation

Signal Connection • 9
Signal Connection
3.1 PXI-7931Topology
Relays on the PXI-7931 are configured into a 4-group 2x4 2-wire matrix. Users
can switch on/off to connect or disconnect any number of rows to any number
of columns in the same bank. This configuration can let user simultaneous
connects one or more input signals to one or more devices. All signal paths on
PXI-7931 are inherently break-before-make.
The TB-6231 is a 2-wire terminal board; each path has two ways (i.e. R0 is
indicated as R0+ and R0-).
Figure 3: 2-wire paths
3

10 • Signal Connection
3.2 PXI-7931 Pin assignment & Description
22. C8+
43. C0+
23. C8-
1.
R0+
44. C0-
24. C9+
2.
R0-
45. C1+
25. C9-
3.
R1+
46. C1-
26.
C10+
4.
R1-
47. C2+
27.
C10-
5.
R2+
48. C2-
28.
C11+
6.
R2-
49. C3+
29.
C11-
7.
R3+
50. C3-
30.
C12+
8.
R3-
51. C4+
31.
C12-
9.
R4+
52. C4-
32.
C13+
10. R4-
53. C5+
33.
C13-
11. R5+
54. C5-
34.
C14+
12. R5-
55. C6+
35.
C14-
13. R6+
56. C6-
36.
C15+
14. R6-
57. C7+
37.
C15-
15. R7+
58. C7-
38. NC
16. R7-
59. NC
39. NC
17. NC
60. AUX3
40. AUX4
18. AUX2/SHDNn
61. AUX6
41. +5V out
19. AUX5
62. AUX7
42. AUX1/TRG_IN
20. GND
21. AUX0/S_ADV
Table 1: Pin Assignment
Signal Name
Type
Description
C0+ to C15+
C0- to C15-
Input/Output
Columns: signals are connected to the
switch module
R0+ to R7+
R0- to R7-
Input/Output
Rows: signals are connected to the switch
module
AUX[7..0] Input/Output
Programmable Digital I/O with tri-state
control.
AUX[2..0] are dual function pins used for
triggering, refer to chapter 4 for details.
TRG_IN
Input
Trigger input for handshaking operation
S_ADV Output
Scanner Advanced trigger output for
handshaking operation
SHDNn
Input
Active-low Emergency Shutdown trigger
+5V out Output
Unregulated +5V DC Source, maximum
100mA current loading
GND
Output
Ground
NC
Not Connected
Unused pin
Table 2: Pin Description

Signal Connection • 11
3.3 TB-6231 Terminal Board
Configurations
The TB-6231 is a screw terminal board with D-sub 62-pin female connector.
The terminal board can attach to PXI-7931 directly, or through ADLINK’s
custom-made high-capacity 62-pin D-sub cable.
Users can use the TB-6231 terminal board to make various matrix
configurations. The TB-6231’s default configuration is a 4-group 2x4 matrix
in 2-wire. If other matrix configurations are preferred, users can refer the
table below to short the relative pads.
For example, to use a 2x4 matrix, do not short any pads. To use 2x16 matrix,
short the last 12 pads at the lower-right corner of the table.
2x4 Matrix
This configuration has four independent 2x4 matrices, Bank0 to Bank3, each
with two rows and four columns. The following diagram illustrates the PXI-
7931 with the TB-6231.

12 • Signal Connection
Figure 4: 2x4 Matrix (I)
In this configuration, the TB-6231 would not have any shorted pads.
The grid below shows the names used for software configuration with
corresponding traces to the TB-6231.

Signal Connection • 13
Figure 5: 2x4 Matrix (II)

14 • Signal Connection
2x8 Matrix
This configuration has two independent 2x8 matrices ranging from Bank0 to
Bank1, each has two rows and eight columns. The following diagram
illustrates the PXI-7931 with the TB-6231 to produce relative paths.
Figure 6: 2x8 Matrix (I)
To use a 2x8 matrix, short the following TB-6231 pads.
The grid below shows the names used for software configuration with
corresponding traces to the TB-6231