Subscribe to Our Youtube Channel
Related Manuals for ADLINK Technology PXI-7921
Summary of Contents for ADLINK Technology PXI-7921
- Page 1 PXI-7921 24-ch, Multiplexer DPDT Relay Module User’s Manual Manual Rev.: Rev. 1.1 Date: February 8, 2020 Part Number: 50-17011-1010...
- Page 2 Copyright © 2004, 2020 ADLINK Technology Inc. All Rights Reserved. Revision History. 1.00 09-07-2004 Initial release 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.
- Page 3 Environmental Responsibility ADLINK is committed to fulfill its social responsibility to global environmental preservation through compliance with the European Union's Restriction of Hazardous Substances (RoHS) directive and Waste Electrical and Electronic Equipment (WEEE) directive. Environmental protection is a top priority for ADLINK. We have enforced measures to ensure that our products, manufacturing processes, components, and raw materials have as little impact on the environment as possible.
- Page 4 Getting Service Customer Satisfaction is top priority for ADLINK Technology Inc. If you need any help or service, please contact us at Ask an Expert: http://askanexpert.adlinktech.com. ADLINK Technology, Inc. Web Site http://www.adlinktech.com Sales & Service Service@adlinktech.com Telephone +886-2-8226-5877 +886-2-8226-5717 Address 9F, No.
-
Page 5: Table Of Contents
2.3 Installing the switch module into a PXI Platform ....6 Chapter 3 Signal Connection ............ 9 3.1 PXI-7921 Topology ............9 3.2 PXI-7921 Pin Assignments & Descriptions ...... 10 3.3 TB-6221 Terminal Board ..........13 2-wire MUX ................ 14 2-wire, 2-group MUX ............ -
Page 6: How To Use This Manual
How to Use This Manual This User Manual is designed to assist users in the installation of the ADLINK PXI-7921, 24-ch Multiplexer DPDT Relay PXI Switch module. Chapter 1 Introduction Gives an outline and overview of ADLINK switch modules’ features, specifications, and applications. -
Page 7: Chapter 1 Introduction
Introduction ADLINK PXI-7921 is a relay multiplexer module which consists of 24 2-wire relays (DPDT, 2 Form C). PXI-7921 provides 48x1 1-wire and 24x1 2-wire and 12x1 4-wire configurations and typically connects one instrument, such as a DMM, a digitizer or a signal source, with many points which need measurement or excitation. -
Page 8: Applications
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... -
Page 9: Software Support
Safety functions • Emergency shutdown • Logic level: 3.3 V/TTL (5V tolerant) • Active with logic low (for AUX2/SHDNn pin) • Emergency shutdown sources: SHDNn, PXI star trigger input, PXI trigger bus • Watchdog timer • Base clock available: 10MHz, fixed •... - Page 10 This page intentionally left blank. Introduction •...
-
Page 11: Chapter 2 Installation
ADLINK switch module. 2.1 Contents The package consists of the following items in addition to the User Manual: • PXI-7921, 24-ch Multiplexer DPDT Relay module • This User’s Guide • ADLINK Software CD •... -
Page 12: Mechanical Drawing
Note: Do not apply power to the module if it has been damaged. You are now ready to install the PXI-7921 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). - Page 13 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. Figure 2: Installing the switch module into a PXI platform Installation •...
- Page 14 This page intentionally left blank. 8 • Installation...
-
Page 15: Chapter 3 Signal Connection
48×1 1-wire multiplexer, or one group of 12×1 4-wire multiplexer. These configurations are totally software programmable. The PXI-7921 typically connects one instrument, such as a DMM or digitizer, to many measurement points or a signal source to several points needing excitation. -
Page 16: Pxi-7921 Pin Assignments & Descriptions
3.2 PXI-7921 Pin Assignments & Descriptions 22. +5 V 43. COM2+ 23. CH8+ 1. CH0+ 44. COM2- 24. CH8- 2. CH0- 45. COM3+ 25. CH9+ 3. CH1+ 46. COM3- 26. CH9- 4. CH1- 47. CH18+ 27. CH10+ 5. CH2+ 48. CH18- 28. - Page 17 22. +5 VOUT 43. COM2+* 23. CH8 1. CH0 44. COM2-* 24. CH32 2. CH24 45. COM3+* 25. CH9 3. CH1 46. COM3-* 26. CH33 4. CH25 47. CH18 27. CH10 5. CH2 48. CH42 28. CH34 6. CH26 49. CH19 29.
- Page 18 Signal Name Type Description COM0± (one wire) Input/Output Common---The common for each bank. COM<0..3>± (two wire) COM<0..1>A±(four wire) COM<0..1>B± (four wire) Input/Output CH<0..47> (one wire) Channels---Where signals are connected to the switch card. CHχ+ CH<0..23>± (two wire) and CHχ- are switched together. CH<0..11>A±...
-
Page 19: Tb-6221 Terminal Board
Users can use the TB-6221 terminal board that consists of a printed circuit with screw terminals. The terminal block connects directly to the front panel I/O connector of the PXI-7921. The TB-6221’s default printed circuit is in 2-wire mode. If other configuration is preferred, user can refer the table on TB-6221 to identify the pin connected. -
Page 20: 2-Wire Mux
2-wire MUX This configuration has one 24x1 2-wire multiplexer Bank0, which has twenty- four channels. The following diagram illustrates the terminal board pin definition. Figure 3: 24x1 MUX Signal Connection •... -
Page 21: 2-Wire, 2-Group Mux
2-wire, 2-group MUX This configuration has two 12x1 2-wire multiplexers Bank0 and Bank1, each has twelve channels. The following diagram illustrates the terminal board pin definition. Figure 4: Two 12x1 MUX Signal Connection •... -
Page 22: 2-Wire, 4-Group Mux
2-wire, 4-group MUX This configuration has four 6x1 2-wire multiplexers Bank0, Bank1, Bank2 and Bank3, each has six channels. The following diagram illustrates the terminal board pin definition. Figure 5: Four 6x1 MUX Signal Connection •... -
Page 23: 1-Wire Mux
1-wire MUX This configuration has one 48x1 1-wire multiplexer Bank0, which has forty- eight channels. The following diagram illustrates the terminal board pin definition. Figure 6: 48x1 MUX Signal Connection •... -
Page 24: 4-Wire Mux
wire MUX This configuration has one 12x1 4-wire multiplexer Bank0, which has twelve channels. The following diagram illustrates the terminal board pin definition. Figure 6: 4-wire MUX Signal Connection •... -
Page 25: Chapter 4 Operation Theorem
Operation Theorem 4.1 Hardware Block Diagram The ADLINK PXI Switch Module features an onboard FPGA for relay switching control, trigger control, scanlist storage and sequencing. The PXI triggering and synchronization functions, such as Star Trigger and Trigger Bus are also supported. -
Page 26: Operation Mode
If relay contact bouncing is of a concern, users would need to insert software delay. ADLINK recommends the debounce time to be at least 5ms on PXI-7921. Auto-scan The ADLINK PXI switch module features onboard memory to store user specified scanlist of up to 1024-entry. - Page 27 connectors, and signals in the dotted-line box represents switch module’s internal signal. Software Trigger TRG_IN Trigger In Signal Trigger Bus [7…0] AUX[2…0] Star Trigger In Figure 8: Available signal sources for Trigger In Scanner Advanced After updating the relay pattern, the switch module starts its debounce timer and waits for the relay contacts to settle.
- Page 28 Handshaking protocol Figures 10 and 11 depict the relationship between Trigger In, Scanner Advanced, and relay pattern in handshaking mode. In Figure 11 the Scanner Advanced is set to pulsating mode. Trigger In Scanner Advanced attern Pattern #2 Pattern #3 Relay status Operation start Figure 10: Handshaking operation (Scanner Advanced set in pulsating mode)
- Page 29 5ms for PXI-7921. T is the user specified scan delay time in the scanlist entry, indicating the time between the relay being debounced and the exact moment that a measurement device takes a new measurement.
- Page 30 Connecting, Trigger and Synchronize with External DMM ® In this example, Agilent 33401A 6-1/2 Digital Multimeter (DMM) is used to demonstrate signal connection for handshaking operation. The DMM provides two terminals on the rear panel for the handshaking operation process, Trig In and VM Comp. The Trig In connects to the Scanner Advanced output on switch module, while the VM Comp to Trigger In.
-
Page 31: Trigger Bus
ADLINK PXI Switch module Scanner Advanced Output (S_ADV) External Trigger Input Trigger Input (Trig In) (TRG_IN) Agilent 33401A Wiring 6-1/2 DMM Measurement Complete (VM Comp) Figure 12: Signal Connection between Switch Module and Agilent DMM For more information on scanlist configuration, scan mode setup, start, and stop functions of the auto-scanning process, please refer to the software programming users’... - Page 32 Software Trigger Trigger In Signal Scanner Adv. Signal AUX [3…2] Trigger Bus[7..0] Star Trigger In WDT Overflow SHDNn Figure 13: Available signal sources for Trigger Bus[7..0] 26 • Operation Theorem...
-
Page 33: Auxiliary Digital I/O
4.5 Auxiliary Digital I/O The eight auxiliary digital I/O lines on ADLINK Switch Modules provide versatility to users’ control applications. Each digital I/O line can be input, output or tri-stated. When in output mode, users can still read back the actual logic- level on the I/O line. -
Page 34: Hot-Swap
Note: Microsoft Windows 2000 does not natively support hot-swap however, PXI-7921 can be hot-swapped by manual control via an additional hot-swap driver. For the hot-swap driver on Windows 2000 and other operating systems such as Linux, VxWorks, etc., please contact ADLINK for more information. -
Page 35: Watchdog Timer
Star Trigger In Figure 12: Available trigger sources for emergency shutdown The default relay pattern for emergency shutdown is All-Off on PXI-7921; users can change the pattern by Windows API. Upon receiving the emergency shutdown trigger, the Switch Module enters shutdown mode, and the relay pattern is switched to the preset state. - Page 36 Int. WDTimer WDT Overflow Trigger Bus Star Trigger In Figure 13:.Available trigger sources for watchdog timer overflow The watchdog timer overflow interval can be programmed through Windows API. After enabling the watchdog timer, users must periodically reset the timer by software command.
-
Page 37: Warranty Policy
Warranty Policy Thank you for choosing ADLINK. To understand your rights and enjoy all the after-sales services we offer, please read the following carefully: Before using ADLINK’s products please read the user manual and follow the instructions exactly. When sending in damaged products for repair, please attach an RMA application form.
Need help?
Do you have a question about the PXI-7921 and is the answer not in the manual?
Questions and answers