National Instruments ER-8 User Manual
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National Instruments ER-8 User Manual

An 8-channel or 16-channel spdt relay accessory for data acquisition boards
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Summary of Contents for National Instruments ER-8

  • Page 1 (217) 352-9330 | Click HERE Find the National Instruments ER-16 at our website:...
  • Page 2 ER-8/16 User Manual An 8-Channel or 16-Channel SPDT Relay Accessory for Data Acquisition Boards December 1996 Edition Part Number 371197A-01 © Copyright 1995, 1996 National Instruments Corporation. All Rights Reserved.
  • Page 3 National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin, TX 78730-5039 (512) 794-0100 Technical support fax: (800) 328-2203 (512) 794-5678 Branch Offices: Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Canada (Ontario) 905 785 0085, Canada (Québec) 514 694 8521, Denmark 45 76 26 00, Finland 09 527 2321, France 01 48 14 24 24,...
  • Page 4 Limited Warranty The ER-8 or ER-16 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period.
  • Page 5 Any use or application of National Instruments products for or involving medical or clinical treatment must be performed by properly trained and qualified medical personnel, and all traditional medical safeguards, equipment, and procedures that are appropriate in the particular situation to prevent serious injury or death should always continue to be used when National Instruments products are being used.

  • Page 6: Table Of Contents

    What You Need to Get Started ..................1-1 Optional Equipment .......................1-2 Software .........................1-2 Unpacking ........................1-2 Chapter 2 Setup ............................2-1 Safety Information ......................2-4 Connecting the ER-8/16 to Your DAQ Device .............2-5 Chapter 3 Signal Connections ......................3-1 Front Connectors......................3-1 Using DIO-24 Devices..................3-1 Using DIO-32 Boards ..................3-2 Power Supply .........................3-2 Channel Connections .....................3-3...
  • Page 7 Appendix A Specifications ........................A-1 Appendix B I/O Connectors ........................B-1 Appendix C Contact Protection ......................C-1 Appendix D Takamisawa VE Series Relay Technical Data ............D-1 Appendix E Customer Communication ....................E-1 Glossary ........................Glossary-1 Index ..........................Index-1 ER-8/16 User Manual © National Instruments Corporation...
  • Page 8 Contact Protection Using a Flyback Diode for DC Loads.........3-5 Figure 3-2. Arc Suppressor Pad Locations for Channel 1 ............3-6 Figure 3-3. ER-8/16 Configurations with DIO Devices............3-9 Figure 3-4. ER-8/16 Configurations with Multifunction DAQ Devices ......3-10 Figure 4-1. ER-8/16 Block Diagram..................4-2 Figure 4-2. ER-8/16 Onboard Equivalent Circuit..............4-3 Figure B-1.

  • Page 9: About This Manual

    About This Manual This manual describes the electrical and mechanical aspects of the ER-8 and ER-16 and contains information concerning their setup, operation, and safety. Both the ER-8 and ER-16 are single- pole double-throw (SPDT) relay accessories for use with other data acquisition (DAQ) products.

  • Page 10: Conventions Used In This Manual

    ER-8/16 ER-8/16 refers to the ER-8 or ER-16 unless otherwise noted. DIO device DIO device refers to National Instruments digital I/O devices such as the AT-DIO-32F, NB-DIO-24, NB-DIO-96, NB-DIO-32F, PC-DIO-24, DAQCard-DIO-24, and PC-DIO-96, unless otherwise noted. DIO-24 device DIO-24 device refers to the National Instruments NB-DIO-24, DAQCard-DIO-24, and PC-DIO-24 digital I/O devices unless otherwise noted.

  • Page 11: National Instruments Documentation

    Glossary. National Instruments Documentation The ER-8/16 User Manual is one piece of the documentation set for your DAQ system. You could have any of several types of manuals, depending on the hardware and software in your system. Use the different types of manuals you have as follows: •...

  • Page 12: Customer Communication

    Customer Communication National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop with our products, and we want to help if you have problems with them.

  • Page 13: Chapter 1 Introduction

    (SPDT) or form C relay channels. The ER-16 consists of 16 isolated SPDT or form C relay channels. The ER-8/16 can serve as a controller or switcher in laboratory testing, production testing, and industrial-process monitoring and control applications. The ER-8/16 operates with full functionality with most National Instruments digital I/O products.

  • Page 14: Optional Equipment

    Refer to Chapter 3, Signal Connections, for additional information on cabling, connectors, and adapters. Software The ER-8/16 requires no additional software beyond what you are using for your DAQ device. Unpacking Your ER-8/16 is shipped in an antistatic package to prevent electrostatic damage to the unit.

  • Page 15: Chapter 2 Setup

    Setup This chapter describes how to set up the ER-8/16. The ER-8 has eight SPDT relays controlled by eight digital lines. Each of these relays has a normally closed (NC) contact that connects to the common (COM) contact when the corresponding digital output line is low, and a normally open (NO) contact that connects to the COM contact when the digital line is high.

  • Page 16: Figure 2-1. Er-8/16 Parts Locator Diagram

    J8—EXT power supply conn. 10 J2—26-pin IN conn. SW1—power supply switch Screw Terminals J3—26-pin OUT conn. J1—DIO-24 and Channel 1 LED Surge Protector Pads Fuses DIO-32 conn. Figure 2-1. ER-8/16 Parts Locator Diagram ER-8/16 User Manual © National Instruments Corporation...

  • Page 17: Table 2-1. Parts Locator Diagram Descriptions

    This external power-supply connector, EXT +5 V, is for external +5 V supply. EXT GND is the reference for the external +5 V supply, and is connected to the ER-8/16 ground. This 26-pin OUT connector sends the 26-pin daisy-chain cable to the ER-8 or the ER-16.

  • Page 18: Safety Information

    Connections, including power signals to ground and vice versa, that exceed any of the maximum signal ratings on the ER-8/16 can create a shock or a fire hazard, or can damage any or all of the devices connected to the ER-8/16, the host computer, and the ER-8/16.

  • Page 19: Connecting The Er-8/16 To Your Daq Device

    The unit must be completely dry and free from contaminants before returning to service. Connecting the ER-8/16 to Your DAQ Device The following are general instructions for setting up your ER-8/16. Consult your computer user manual or technical reference manual for specific instructions and warnings. Warning: Connections that exceed any of the maximum rating of the input signals on the ER-8/16 can damage the ER-8/16, your computer, and the DAQ device.
  • Page 20 Setup Chapter 2 2. Remove the top cover of your ER-8/16 by removing the four screws located on the bottom of your unit. 3. Connect the 50-pin interfacing cable to the appropriate 50-pin connector located on the front end of the ER-8/16 as shown in Figure 2-2.

  • Page 21: Figure 2-2. The Er-8/16 Front Connector

    Chapter 2 Setup 7. You can now test your ER-8/16 without making any connections to the screw terminals by writing to port A (0). When you write a digital 1 to port A (0), the DS1 LED should turn green, indicating it is ON. You may also hear a clicking sound. Port A (0) corresponds to channel 1 on the ER-8/16.

  • Page 22: Chapter 3 Signal Connections

    This chapter describes the signal connections, channel connections, and digital interface to the ER-8/16. Front Connectors This section describes the signal connections to the ER-8/16 via the I/O connectors for the digital interface. Warning: Connections that exceed any of the maximum ratings of the input signals on the ER-8/16 can damage the ER-8/16, your computer, and the DAQ device.

  • Page 23: Using Dio-32 Boards

    You can use either your DAQ device’s internal +5 V supply or an external +5 V supply to power up your ER-8/16. If you use an external +5 V supply, use the two screw terminals to connect external +5 V and GND. Refer to Figure 2-1 in Chapter 2, Setup, for the location of this screw terminal on the ER-8/16.

  • Page 24: Channel Connections

    In addition to the above note, refer to Figures 3-3 and 3-4 for information on configurations that require an external +5 V supply. When you connect more than one ER-8 with any of the SC-205X Series cable adapters, you will need an external +5 V power supply.

  • Page 25: Power-Up Conditions

    NO contact. Wire Gauge When using the ER-8, you can use up to 16 AWG gauge wire for all channels. If you are using the ER-16 and all channels are in use, use 18 AWG gauge wire, maximum.

  • Page 26: Figure 3-1. Contact Protection Using A Flyback Diode For Dc Loads

    Load Flyback Diode Relay Figure 3-1. Contact Protection Using a Flyback Diode for DC Loads Table 3-1. Arc Suppressor Placement, COM to NO COM to NO Transient Voltage Suppressor Channel Number Reference Designator © National Instruments Corporation ER-8/16 User Manual...

  • Page 27: Connecting Your Signal Lines

    To connect the signal wires to the screw terminals, perform the following steps: 1. Turn off your ER-8/16. Make sure the signal wires you are connecting to the screw terminals are also turned off and do not contain any live voltages. Also make sure the host computer is turned off.

  • Page 28: Internal Connectors

    4. Connect the wires to the screw terminals. 5. Bundle the wires at the rear end of the ER-8/16 and use a tie-wrap to tie them together. 6. Replace the top cover so that the bundled wires fall within the smaller rectangular hole in the top cover.

  • Page 29: Daisy Chaining The Er-8/16

    Using the SC-205X Series with the ER-8 You can use your SC-205X Series cable adapter with the Lab or MIO boards to control the ER-8. Connect the 26-pin cable to the ER-8 IN connector only. In this configuration, you can control only channels 1 through 8.

  • Page 30: Daq System Configurations With The Er-8/16

    Chapter 3 Signal Connections DAQ System Configurations with the ER-8/16 The following figures show the possible DAQ system configurations using the ER-8/16 for multichannel control. Port A Port A, Port B DIO-24 Boards DIO-24 Boards Cable*1 Cable*1 (or AT-MIO-16D, ER-8...

  • Page 31: Figure 3-4. Er-8/16 Configurations With Multifunction Daq Devices

    Signal Connections Chapter 3 Figure 3-4 shows the possible DAQ system configurations using National Instruments multifunction DAQ devices and the ER-8/16. Port A Port A Cable *2 Digital I/O NB7 Cable 1200 Series/ E-Series/MIO SC-2053 ER-8 ER-8 SC-2050 Lab Boards...

  • Page 32: Chapter 4 Theory Of Operation

    ER-8/16. Functional Overview The ER-8 has eight SPDT relays controlled by eight digital lines connected to the ER-8. Each of these relays has an NC contact that is connected to the COM contact when the corresponding digital output line is low, and an NO contact that is connected to the COM contact when the digital line is high.

  • Page 33: Figure 4-1. Er-8/16 Block Diagram

    NC 13 CH15 RELAY CH16 RELAY NO 14 CH14 COM 14 NC 14 NO 15 CH15 COM 15 NC 15 NO 16 CH16 COM 16 NC 16 Terminal Block Figure 4-1. ER-8/16 Block Diagram ER-8/16 User Manual © National Instruments Corporation...

  • Page 34: Digital Interface

    Theory of Operation Digital Interface There are four connectors with which to interface an ER-8/16 to digital devices or to daisy-chain it to another ER-8/16. The two front connectors are marked DIO-24 and DIO-32; the two internal connectors are marked IN and OUT. Use the internal connectors when daisy-chaining ER-8/16 or when using SC-205X Series cable adapters.

  • Page 35: Appendix A Specifications

    Appendix A Specifications This appendix lists the specifications for the ER-8/16. These specifications are typical at 25° C and 50% humidity unless otherwise noted. Channel Rating Number of channels ..............8 channels for ER-8 16 channels for ER-16 Relay type................SPDT (1 Form C), nonlatching Max switching capacity (resistive load) AC..................3 A at 250 VAC...
  • Page 36 External................DIO-24 and DIO-32 50-pin male, latching type, ribbon- cable front connectors Internal.................IN and OUT 26-pin male, latching type, ribbon-cable internal connectors Channel screw terminals ............24 for ER-8, 16 AWG wire max, 48 for ER-16, 18 AWG wire max Power supply screw terminals..........2 Environment Operating temperature.............0°...

  • Page 37: Figure B-1. The Dio-24 Connector

    Appendix B I/O Connectors This appendix contains the connector pinouts and pin descriptions for the ER-8/16. DIO-24 Connector +5 V Figure B-1. The DIO-24 Connector © National Instruments Corporation ER-8/16 User Manual...

  • Page 38: Table B-1. Dio-24 Connector Pin Descriptions

    11, 13 15 to the 26-pin OUT connector for daisy chaining to another ER-8. Each of these pins controls the relay channel of the daisy-chained ER-8. A digital high on these pins connects the COM contact of a channel to the NO contact of that channel.

  • Page 39: I/O Connectors

    Appendix B I/O Connectors DIO-32 Connector Figure B-2. The DIO-32 Connector © National Instruments Corporation ER-8/16 User Manual...

  • Page 40: Table B-2. Dio-32 Connector Pin Descriptions

    26-pin OUT connector for daisy chaining to another ER-8 or ER-16. Each of these pins controls the relay channel of the daisy chained ER-8 or ER-16. A digital high on these pins connects the COM contact of a channel to the NO contact of that channel.

  • Page 41: Figure B-3. 26-Pin Internal Connectors

    Ground—These pins are connected to the internal ground on the ER-8/16. 1, 3, 5, 7, +5 V +5 VDC supply—These pins are connected to the internal (INT) +5 VDC supply on the ER-8/16. © National Instruments Corporation ER-8/16 User Manual...

  • Page 42: Table B-4. 26-Pin Out Connector Pin Descriptions

    PD<7..0> Port D Channels 7 through 0—These signals are for daisy 16, 18, 20, chaining to another ER-8 or ER-16. Each of these pins 22, 24 controls the relay channel of the daisy chained ER-8 or ER-16. A digital high on these pins connects the COM contact of a channel to the NO contact of that channel.
  • Page 49 Appendix D Takamisawa VE Series Relay Technical Data* This appendix contains a manufacturer data sheet for the relays used on the ER-8/16. Copyright © Farnell Electronics, Inc. 1995. Reprinted with permission of copyright owner. All rights reserved. Farnell Electronics, Inc. Farnell Relay Products, Takamisawa Relay & SSR General Catalog ‘95–’96.

  • Page 55: Customer Communication

    Instruments or to comment on our products. Filling out a copy of the Technical Support Form before contacting National Instruments helps us help you better and faster. National Instruments provides comprehensive technical assistance around the world. In the U.S. and Canada, applications engineers are available Monday through Friday from 8:00 a.m. to 6:00 p.m.
  • Page 56 National Instruments for technical support helps our applications engineers answer your questions more efficiently. If you are using any National Instruments hardware or software products related to this problem, include the configuration forms from their user manuals. Include additional pages if necessary.
  • Page 57 Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently.
  • Page 58 Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs. Title: ER-8/16 User Manual December 1996 Edition Date: 371197A-01 Part Number: Please comment on the completeness, clarity, and organization of the manual.

  • Page 59: Glossary

    NuBus Series computers normally closed normally open port A pin port B pin port C pin PCMCIA personal computer memory card association © National Instruments Corporation Glossary-1 ER-8/16 User Manual...
  • Page 60 Glossary port D pin printed wire board random-access memory seconds SPDT single-pole double-throw volts volts alternating current volts direct current Vrms volts, root-mean-square ER-8/16 User Manual Glossary-2 © National Instruments Corporation...

  • Page 61: Index

    B-5, B-6 for DIO-32 boards, 3-2 DIO-24 connector (table), B-2 internal connectors, 3-7 to 3-8 26-pin internal connectors daisy chaining the ER-8/16, 3-8 pin assignments (figure), B-5 I/O connectors pin descriptions (table), B-5 to B-6 26-pin internal connectors, B-5 to B-6...
  • Page 62 (figure), B-1 GND signal pin descriptions (table), B-2 26-pin internal connector DIO-24 devices (table), B-5, B-6 connecting to ER-8/16, 3-1 to 3-2 DIO-24 connector (table), B-2 power supply (note), 3-3 DIO-32 connector (table), B-4 DIO-32 boards connecting to ER-8/16, 3-2...
  • Page 63 Index PA<7..0> signal safety information for ER-8/16, 2-4 26-pin internal connector (table), B-5 SC-205X series, using with ER-8/16, 3-8 DIO-24 connector (table), B-2 screw terminals DIO-32 connector (table), B-4 description (table), 2-3 PB<7..0> signal parts locator diagram, 2-2 26-pin internal connector (table), B-5...
  • Page 64 D-1 technical support, E-1 theory of operation block diagram, 4-2 digital interface, 4-3 functional overview, 4-1 relay channels, 4-3 unpacking the ER-8/16, 1-2 voltage, hazardous, 2-4 wire gauge, channel connections, 3-4 ER-8/16 User Manual Index-4 © National Instruments Corporation...

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