Keithley 7037 Instruction Manual
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Keithley 7037 Instruction Manual

Keithley 7037 Instruction Manual

Single-pole relay-digital i/o card
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Instruction Manual
Model 7037
Single-Pole Relay-Digital I/O Card
Contains Operating and Servicing Information
7037-901-01 Rev. A / 5-97

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  • Page 1 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com Instruction Manual Model 7037 Single-Pole Relay-Digital I/O Card Contains Operating and Servicing Information 7037-901-01 Rev. A / 5-97...
  • Page 2 WARRANTY Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of shipment. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation.
  • Page 3 Model 7037 Single-Pole Relay-Digital I/O Card Instruction Manual ©1997, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. First Printing, May 1997 Document Number: 7037-901-01 Rev. A...
  • Page 4 Revision of the manual. Each new Revision includes a revised copy of this print history page. Revision A (Document Number 7037-901-01)..................May 1997 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand and product names are trademarks or registered trademarks of their respective holders.
  • Page 5 (IEC) Standard IEC 664, digital multimeter measuring circuits The types of product users are: (e.g., Keithley Models 175A, 199, 2000, 2001, 2002, and 2010) measuring circuits are Installation Category II. All other instru- Responsible body is the individual or group responsible for the use ments’...
  • Page 6 Keithley Instru- ments. Standard fuses, with applicable national safety approvals, Chassis connections must only be used as shield connections for may be used if the rating and type are the same.

  • Page 8: Table Of Contents

    Table of Contents General Information Introduction ................................1-1 Features ................................1-1 Warranty information............................1-2 Manual addenda ..............................1-2 Safety symbols and terms ........................... 1-2 Specifications ..............................1-2 Unpacking and inspection ........................... 1-2 Inspection for damage ..........................1-2 Handling precautions ........................... 1-2 Shipping contents ............................
  • Page 9 Typical relay switch connection scheme ......................4-10 Typical digital I/O connection schemes ......................4-11 Output connection schemes........................4-11 Input connection scheme ........................... 4-12 Model 7037 installation and removal ........................ 4-13 Card installation............................4-13 Card removal ............................. 4-13 Operation Introduction ................................. 5-1 Power limits.................................
  • Page 10 Service Information Introduction ................................. 6-1 Handling and cleaning precautions ........................6-1 Performance verification............................. 6-2 Environmental conditions ........................... 6-2 Recommended equipment........................... 6-2 Card connections............................6-2 Channel resistance tests ..........................6-3 Offset current tests ............................6-4 Contact potential tests ..........................6-5 Channel to channel isolation tests ....................... 6-5 Common-mode isolation tests........................
  • Page 11 List of Illustrations Relay Switch Configuration Figure 2-1 Model 7037 relay switch configuration (simplified schematic) ..............2-1 Digital I/O Configuration Figure 3-1 Output configuration for pull-up devices....................3-1 Figure 3-2 Output configuration using pull-up resistance .................... 3-2 Figure 3-3 Input configuration............................3-2...
  • Page 12 Model 7022 channel status display (slot 1) ....................5-3 Figure 5-5 Channel display organization ........................5-3 Figure 5-6 Model 7037 programming channel assignments..................5-4 Figure 5-7 Path isolation resistance ..........................5-8 Figure 5-8 Voltage attenuation by path isolation resistance ..................5-8 Figure 5-9 Power line ground loops..........................
  • Page 13 Troubleshooting procedure ........................6-14 Replaceable Parts Table 7-1 Relay card for Model 7037 parts list......................7-2 Table 7-2 Mass terminated connector card for Model 7037 parts list................7-3 Table 7-3 Model 7011-KIT-R 96-pin female DIN connector kit parts list ..............7-3...

  • Page 14: General Information

    • Model 7011-KIT-R connector kit that includes a 96-pin • Warranty information female DIN connector that will mate directly to the con- nector on the Model 7037 or to a standard 96-pin male • Manual addenda DIN bulkhead connector (see Model 7011-MTR). This •...

  • Page 15: Warranty Information

    Warranty information Specifications Warranty information is located at the front of this instruc- Model 7037 specifications are found at the front of this man- tion manual. Should your Model 7037 require warranty ser- ual. These specifications are exclusive of the mainframe...

  • Page 16: Instruction Manual

    Model 7037 Instruction each end. It will mate directly to the connector on the Model Manual. 7037 and to a standard 96-pin male DIN bulkhead connector (see Model 7011-MTR). If an additional instruction manual is required, order the manual package, Keithley part number 7037-901-00.

  • Page 17: Relay Switch Configuration

    This section covers the basic single-pole, single-throw (SPST) switch configuration Basic switch configuration (SPST) A simplified schematic of the Model 7037 relay switch con- OUT1 figuration is shown in Figure 2-1. The card has 30 indepen- dent channels. Each channel is made up of a single-pole, One of 30 Channels single-throw (SPST), normally open (NO) switch.

  • Page 18: Digital I/O Configuration

    This section covers the basic digital input and output config Typically, the digital outputs are used to provide drive for rel- urations for the Model 7037. Connection information for atively high current devices such as solenoids, relays, and these configurations is provided in Section 4 of this manual, small motors.

  • Page 19: Controlling Devices Using Pull-Up Resistors

    Digital I/O Configuration 7037 Jumper 10kΩ Gate Logic Driver Device Figure 3-2 Output configu ation using pull-up resistance When the resistor is connected to 5V, the channel is pulled Controlling devices using pull-up resistors high. Thus, with nothing connected to the channel, the input is pulled high to 5V which displays the channel as on.

  • Page 20: Card Connections And Installation

    The information in this section is arranged as follows: micro-switch monitoring. • Handling precaution — Explains precautions that • Model 7037 installation and removal — Provides the must be followed to prevent contamination to the card. procedures to install and remove the card from the Contamination could degrade the performance of the Model 7001/7002 mainframe.

  • Page 21: Handling Precautions

    Card Connections and Installation A plug-in jumper for the bank allows you to select the inter- Handling precautions nal +5V source or an external source. In Figure 4-1, the To maintain high impedance isolation, care should be taken banks are using the external voltage source. when handling the relay and connector cards to avoid con- tamination from such foreign materials as body oils.
  • Page 22 Card Connections and Installation U203 U201 U202 J201 Figure 4-2 Component locations — connector board Jumper Jumper A. 5V Source Selected B. External Source Selected Figure 4-3 Voltage source jumper installation...

  • Page 23: Configuring Digital I/O Output Logic

    Card Connections and Installation Configuring digital I/O output logic Jumper Referring to Figure 4-4 for the digital I/O output logic loca- tion, perform the following steps to configure J101 1. If mated together, separate the relay card from the con- nector card by removing the mounting screw and then pulling the two cards away from each other.

  • Page 24: Multi-Pin (Mass Termination) Connector Card

    Card Connections and Installation Keithley has a variety of cable and connector accessories Jumper available to accommodate connections from the connector card to test instrumentation and DUTs (devices under test). In general, these accessories, which are summarized in Table 4-1, utilize a round cable assembly for connections.
  • Page 25 Channel Designator Connector 34 2b Digital Output Schematic Connector Pins of the Model 7037 mass Channel Designator Designator termination connector can be identified in one of three ways: • Relay switch or digital I/O channels. • Connector designation, consisting of rows a-c and columns 1-32.
  • Page 26 Card Connections and Installation Table 4-2 Multi-pin connector card terminal designation cross-reference Conn. Schem. Conn. Schem. Conn. Schem. Switch desig. desig. Switch desig. desig. Switch desig. desig. terminal 1a-32c 1-96 terminal 1a-32c 1-96 terminal 1a-32c 1-96 Chan 1 Chan 17 IN DIG OUT 35 DIG OUT 36 Chan 2...
  • Page 27 It is recommended that external circuitry be connected (plugged in) after the Model WARNING 7037 is installed in the Model 7001/7002 mainframe and with the mainframe power Before beginning any wiring proce- off. Installation is covered at the end of dures, make sure all power is off and this section.
  • Page 28 Card Connections and Installation In Figure 4-8A, connections are accomplished using a Model In Figure 4-8C, connections are accomplished using a 7011-MTC-2 cable and a Model 7011-MTR bulkhead con- custom-built cable assembly that consists of a Model 7011- nector. The two-meter round cable is terminated with a 96- KIT-R connector and a suitable round cable.

  • Page 29: Typical Relay Switch Connection Scheme

    Card Connections and Installation The other end will mate to the Model 7037 card. Connection Typical relay switch connection scheme details are provided in the Multi-pin (mass termination) con- The following paragraphs show how the Model 7037 could nections paragraph.

  • Page 30: Typical Digital I/O Connection Schemes

    The following examples show output connections from the card to external circuitry and summarize the required inter- nal connections on the card. Each example assumes negative 7037 Motors true logic is used. To conf gure for positive true logic, refer to the Conf guring digital I/O output logic paragraph.

  • Page 31: Input Connection Scheme

    Card Connections and Installation Logic device control — Figure 4-14 shows a digital output connection scheme to control a logic device. This example Micro- assumes that an internal +5V voltage source is being used. 7037 switches IN 1 Logic device 7037...

  • Page 32: Model 7037 Installation And Removal

    Model 7037 card in. Installation or removal of the Model 3. Referring to Figure 4-16, feed the Model 7037 card into 7037 is to be performed by qualified ser- the desired slot so the edges of the relay card ride in the vice personnel.
  • Page 33 Card Connections and Installation 4-14...

  • Page 34: Operation

    7001/7002 Switch System mainframe. Input channels • Measurement considerations — Reviews a number of Maximum voltage level: 42V peak considerations when using the Model 7037 to make measurements. Relay switch maximum signal levels To prevent overheating or damage to the relays, never exceed...

  • Page 35: Mainframe Control Of The Card

    FUSE OUT 2 IN 2 Mainframe control of the card B. Diode Clamped (DC Voltages) The following information pertains to the Model 7037 card. It assumes you are familiar with the operation of the Model 7037 IN 1 7001/7002 mainframe.

  • Page 36: Channel Assignments

    The left portion of the display is for slot 1 (card 1), and the right portion is for slot 2 (card 2). With two Model 7037 cards installed in the mainframe, the 40 channels of each card will be displayed as shown in Figure 5-3.
  • Page 37 2!30 B. Slot 2 2!31 2!32 2!33 2!34 2!35 2!36 2!37 2!38 2!39 2!40 (Card 2) Examples: 1!18 = Slot 1, Channel 18 2!36 = Slot 2, Channel 36 (Output 36, Digital I/O) Figure 5-6 Model 7037 programming channel assignments...

  • Page 38: Closing And Opening Channels

    Operation Pressing CLOSE will turn on channel 2!1 and the channels Closing and opening channels that make up channel pattern M1. Refer to the instruction manual for the mainframe and for information on definin NOTE channel patterns. This procedure applies to relay channels (channels 1!1 through 1!30) and digital I/O output channels (1!31 through 1!40).

  • Page 39: Reading Input Channels

    IEEE-488 bus operation up channel pattern M1: Bus operation is demonstrated using Microsoft QuickBASIC 4.5, the Keithley KPC-488.2 (or Capital Equipment Corpo- PRINT #1, "output 07; *rst" ration) IEEE interface and the HP-style Universal Language PRINT #1, "output 07; trig:coun:auto on"...
  • Page 40 Operation The first statement selects the *RST default configuration for Read input channels; slot 9 :SENSe10:DATA? <list> the scan. The second statement sets channel count to the Read input channels; slot 10 :SENSe11:DATA? <list> scan-list-length (5). The third statement defines the scan list, and the last statement takes the mainframe out of the idle The conventional form for the <list>...

  • Page 41: Measurement Considerations

    Operation Measurement considerations Many measurements made with the Model 7037 are subject to various effects that can seriously affect low-level measure- ment accuracy. The following paragraphs discuss these effects and ways to minimize them. PATH Path isolation The path isolation is simply the equivalent impedance between any two test paths in a measurement system.

  • Page 42: Radio Frequency Interference

    RFI can be minimized in several ways. The most obvious Power Line Ground method is to keep the equipment and signal leads as far away from the RFI source as possible. Shielding the Model 7037 Figure 5-9 relay-digital I/O card, signal leads, sources, and measuring Power line ground loops instruments will often reduce RFI to an acceptable level.

  • Page 43: Keeping Connectors Clean

    LO terminals. However, all instruments in rial. In addition, the Model 7037 card should be used only in the test setup may not be designed in this manner. When in clean, dry environments to avoid contamination.

  • Page 44: Service Information

    Handling and cleaning precautions WARNING The information in this section is Because of the high impedance circuits on the Model 7037, intended only for qualified service per- care should be taken when handling or servicing the card to sonnel. Some of the procedures may...

  • Page 45: Performance Verification

    All verification measurements should be made at an ambient The following paragraphs discuss performance verificatio temperature between 18° and 28° C, and at a relative humid- procedures for the Model 7037, including channel resis- ity of less than 70%. tance, offset current, contact potential, and isolation.

  • Page 46: Channel Resistance Tests

    7. Repeat the basic procedure of steps 1 through 6 to test explained at the beginning of this sec- the rest of the channels of the Model 7037 card. Remem- tion. Failure to clean the solder connec- ber to close the channel that the Model 2000 is con-...

  • Page 47: Offset Current Tests

    Service Information Offset current tests 3. Install the Model 7037 card in slot 1 (CARD 1) of the Model 7001/7002 if it is not already installed. These tests check leakage current from input (IN) and output 4. On the Model 6517A, select the 200pA range and (OUT) to chassis (common mode) for each channel.

  • Page 48: Contact Potential Tests

    Figure 6-3. the leakage current across the channels. The isolation resis- 4. Install the Model 7037 card in slot 1 (CARD 1) of the tance is then calculated as R = V/I. In the following proce- Model 7001/7002 if it is not already installed.
  • Page 49 Figure 6-4. Make sure the voltage source is off. nels 1 and 2. 3. Install the Model 7037 in slot 1 (CARD 1) of the 10. Turn off the Model 6517A voltage source. Model 7001/7002 if it is not already installed.
  • Page 50 Service Information Table 6-2 Channel to channel isolation tests Test no. Isolation test Test equipment location Channels closed Channel 1 to Channel 2 Channels 1 and 2 1!1 and 1!2 Channel 2 to Channel 3 Channels 2 and 3 1!2 and 1!3 Channel 3 to Channel 4 Channels 3 and 4 1!3 and 1!4...

  • Page 51: Common-Mode Isolation Tests

    Model 7037 the rear panel of the Model 7001/7002. channels. Remember to close the relay of the channel 3. Install the Model 7037 in slot 1 (CARD 1) of the being checked. Model 7001/7002 if it is not already installed.

  • Page 52: Channel Functionality Test

    However, since many the output channel. Verify that the display indicates that devices in the Model 7037 are static-sensitive, it is recom- the output channel is on (closed). Keep in mind that the mended that they all be treated as static-sensitive.

  • Page 53: Principles Of Operation

    The following paragraphs discuss the basic operating princi- Model 7037. Key elements include the ROM, which contains ples for the Model 7037 and can be used as an aid in trouble- card ID and configuration information, relay drivers and shooting the card. The schematic drawings of the card are...

  • Page 54: Id Data Circuits

    Service Information 2. The mainframe sends the ROM address location to be ID data circuits read over the IDDATA line. The ROM then transmits an Upon power-up, card identification information from each acknowledge signal back to the mainframe, and it then card is read by the mainframe.

  • Page 55: Relay Control

    Service Information Relay control Digital I/O input channel control Card relays are controlled by serial data transmitted via the The mainframe reads digital input channels of the I/O card relay OUTDATA line. A total of fi e bytes for each card are from a serial, two-byte data stream (via INDATA line).

  • Page 56: Troubleshooting

    Service Information Troubleshooting Troubleshooting equipment Table 6-3 summarizes recommended equipment for trouble- WARNING shooting the Model 7037. Lethal voltages are present within the Model 7001/7002 mainframe. Some of Table 6-3 Recommended troubleshooting equipment the procedures may expose you to haz- ardous voltages.

  • Page 57: Troubleshooting Procedure

    Service Information Troubleshooting procedure Table 6-4 summarizes relay-digital I/O card troubleshooting. Table 6-4 Troubleshooting procedure Step Item/Component Required Condition Comments GND pad All voltages referenced to digital ground (GND pad). Q100, pin 2 +6VDC Relay voltage. U101, pin 16 +5VDC Logic voltage.

  • Page 58: Replaceable Parts

    5. Keithley part number 7021-170 — Component Layout, Mass Terminated Con- Factory service nector Card for 7037. If the card is to be returned to Keithley Instruments for repair, 7021-176 — Schematic, Mass Terminated Connector Card perform the following: for 7037.
  • Page 59 Replaceable Parts Table 7-1 Relay card for Model 7037 parts list Circuit Keithley designation Description part no. 2-56X3/16 PHILLIPS PAN HEAD SCREW (BOARD TO SHIELD) 3-56X3/16PPH 2-56X5/16 PHILLIPS PAN HEAD SEMS SCREW (BOARD TO SHIELD) 2-56X5/16PPHSEM 2-56X5/8 PHILLIPS PAN HEAD FASTENER (FOR P2001 TO STAND-...
  • Page 60 Replaceable Parts Table 7-2 Mass terminated connector card for Model 7037 parts list Circuit Keithley designation Description part no. 2-56X3/16 PHILLIPS PAN HEAD SCREW (FOR SHIELD) 2-56X3/16PPH 2-56X3/8 PHILLIPS PAN HEAD SCREW (FOR BRACKET) 2-56X3/8PPH 2-56X7/16 PHILLIPS PAN HEAD SCREW...
  • Page 66 R 2 0 9 R 2 0 5 R 2 0 1 U 2 0 3 NOTE: FOR COMPONENT INFORMATION, SEE PRODUCT STRUCTURE. *DO NOT POPULATE THESE PARTS FOR MODEL 7037; R211,C204,K202,CR202,Q201,R213,R206,CR201,K201,J204,J205. M O D E L NEXT ASSEMBLY QTY. USED ON...
  • Page 69 Channel resistance tests 6-3 Factory service 7-1 Measurement considerations 5-8 Channel to channel isolation tests 6-5 Features 1-1 Model 7037 installation and Closing and opening channels 5-5 removal 4-13 Common-mode isolation tests 6-8 Multi-pin (mass termination) Component layouts and schematic...
  • Page 70 Parts lists 7-1 Safety symbols and terms 1-2 Unpacking and inspection 1-2 Path isolation 5-8 Scanning channels 5-5 Performance verification 6-2 Shipping contents 1-2 Power-on safeguard 6-12 Special handling of static-sensitive Power limits 5-1 devices 6-9 Principles of operation 6-10 Specifications 1-2 Voltage source jumper 4-2 Pull-up resistors 4-2...
  • Page 71 Service Form Model No. Serial No. Date Name and Telephone No. Company List all control settings, describe problem and check boxes that apply to problem. Intermittent Analog output follows display Particular range or function bad; specify IEEE failure Obvious problem on power-up Batteries and fuses are OK Front panel operational All ranges or functions are bad...
  • Page 72 Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44139 Printed in the U.S.A.

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