Keithley 7020-D Instruction Manual
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Keithley 7020-D Instruction Manual

Keithley 7020-D Instruction Manual

Digital i/o interface card
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Model 7020
Digital I/O Interface Card
Instruction Manual
A G R E A T E R M E A S U R E O F C O N F I D E N C E

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  • Page 1 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com Model 7020 Digital I/O Interface Card Instruction Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E...

  • Page 2: Limitation Of Warranty

    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 7020 Digital I/O Interface Card Instruction Manual ©1995, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Second Printing, March 2001 Document Number: 7020-901-01 Rev. B...
  • Page 4 Addendum A (Document Number 7020-901-02)................... April 1998 Revision B (Document Number 7020-901-01)..................March 2001 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: Safety Precautions

    Keithley products are designed for use with electrical signals that For maximum safety, do not touch the product, test cables, or any are rated Installation Category I and Installation Category II, as de- other instruments while power is applied to the circuit under test.
  • Page 6 Chassis connections must only be used as shield connections for leads, and input jacks, must be purchased from Keithley Instru- measuring circuits, NOT as safety earth ground connections. ments. Standard fuses, with applicable national safety approvals, may be used if the rating and type are the same.
  • Page 7 7020 and 7020-D Digital I/O Interface Cards DIGITAL I/O CAPABILITY: Forty independent inputs. Forty independent outputs. Output Channel OUTPUT SPECIFICATIONS: 5.3V EXTERNAL Configuration: 40 open collector drivers with factory installed 10kΩ pull up resistors. Pull-up resistors can be removed when driving external pull-up devices.
  • Page 9 Card removal............................... Input/output connections............................. Typical connection techniques..........................Typical output connection schemes ........................2.10 Typical input connection scheme........................2.11 Models 7020-D and 7020-DT ..........................Operation Introduction ................................ Power limits ................................ Channel status display............................Channel assignments............................Controlling output channels ..........................Turning output channels On and Off ........................
  • Page 10 Service Information Introduction ................................ Handling and cleaning ............................Channel functionality test ........................... Static-sensitive devices............................Principles of operation............................Block diagram..............................ID data circuits..............................Output channel control ............................Input channel control ............................4.10 Power-on safeguard ............................4.11 Troubleshooting..............................4.12 Troubleshooting access............................4.13 Troubleshooting procedure..........................
  • Page 11 List of Illustrations Digital I/O Configuration Figure 1-1 Output configurations for pull-up devices ....................Figure 1-2 Output configuration using pull-up resistance .................... Figure 1-3 Input configuration............................Card Connections and Installation Figure 2-1 Voltage source jumpers for output channels....................Figure 2-2 Component locations —...

  • Page 13: List Of Tables

    List of Tables Card Connections and Installation Table 2-1 Pull-up resistors identification ........................Table 2-2 Output channel terminal identification ....................... Table 2-3 Input channel terminal identification ......................Table 2-4 Miscellaneous terminal identification ......................Table 2-5 I/O connection accessories.......................... Table 2-6 Terminal identification..........................

  • Page 15: Introduction

    Digital I/O Configuration Each output channel uses a fly-back diode for protection Introduction when switching an inductive device, such as a solenoid coil. This section covers the basic digital input and output config This diode diverts the potentially damaging fly-back voltage urations for the Model 7020.
  • Page 16 Digital I/O Configuration 7020 7020 JUMPER 5.3V = Pull-up resistor 10kΩ = Input protection resistor SOLENOID OR RELAY 100kΩ INPUT COIL OUTPUT <18Ω DRIVER Figure 1-3 Input configu ation A. Using Internal Voltage Source (5.3V) 7020 JUMPER SOLENOID OR RELAY COIL OUTPUT <18Ω...

  • Page 17: Introduction

    Card Connections and Installation Introduction Voltage source jumpers Digital output high can be supplied by the internal 5.3V volt- WARNING age source, or by a user supplied voltage. At the factory, in- The following connection and installa- ternal jumpers are set to use the internal 5.3V source. tion procedures are to be performed by qualified service personnel.

  • Page 18: Figure 2-1 Voltage Source Jumpers For Output Channels

    Card Connections and Installation EXT1 EXT2 W105 5.3V 5.3V 5.3V 5.3V 5.3V W104 W103 W102 W101 W100 BANK BANK BANK BANK BANK Figure 2-1 Voltage source jumpers for output channels R184 R183 R182 R181 R180 W100 W101 W102 W105 W103 W104 Figure 2-2 Component locations —...

  • Page 19: Pull-Up Resistors

    Card Connections and Installation The resistor networks (R180 through R181) are located on JUMPER the scanner board (see Figure 2-2). To remove a resistor net- work, use a thin-bladed screwdriver and carefully pry the chip out of the socket. Pull-up resistors should be replaced with same value and wattage only.

  • Page 20: Card Removal

    Card Connections and Installation Ejector Arms (2) 2 Unlock card 1 Screw Screw 1 Lock card Figure 2-4 Model 7020 card installation in Model 7001 Input/output connections Card removal Connections to external circuitry are made at the 96-pin male To remove the card assembly, loosen the safety ground DIN bulkhead connector.

  • Page 21: Figure 2-5 96-Pin Din Connector Pinout

    Card Connections and Installation View from pin side of connector 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Figure 2-5 96-pin DIN connector pinout Table 2-2...

  • Page 22: Typical Connection Techniques

    Wire directly to Connector instrumentation Typical connection techniques Card and DUT Keithley has two connector accessories available to 7011-KIT-R Cable Connector Kit accommodate connections from the DIN connector of the card to external circuitry. These accessories are summarized Notes: Figure 2-7 provides an exploded view showing how the connector (with cable) is assembled.

  • Page 23: Typical Output Connection Schemes

    Card Connections and Installation Figure 2-7 Model 7011-KIT-R (with/cable) assembly View from solder cup side of connector 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Note: See Tables 2-2, 2-3 and 2-4 for terminal identification.

  • Page 24: Figure 2-9 Digital Output, Solenoid Control

    Card Connections and Installation 7020 7020 MOTORS SOLENOIDS EXT1 EXT2 – – OUT 1 OUT 2 OUT 3 OUT 17 OUT 18 INTERNAL CONNECTIONS: EXTERNAL VOLTAGE SOURCE (V ) SELECTED. EXT1 PULL-UP RESISTORS (R180) REMOVED. INTERNAL CONNECTIONS: EXTERNAL VOLTAGE SOURCE (V ) SELECTED.

  • Page 25: Typical Input Connection Scheme

    2.11 Models 7020-D and 7020-DT pattern (value) seen at the input of the DMUX (lines A, B and The Models 7020-D and 7020-DT are alternate configura C) determines which DMUX output line (Y0 through Y7) is tions of the Model 7020 Digital I/O Interface Card. The selected (pulled low).

  • Page 26: Figure 2-15 Mating Connector (Solder-Side View)

    Card Connections and Installation Connections to external circuitry are made at the 50-pin Input/output connections D-Sub connectors. Connector pinouts are shown in Table WARNING 2-6. Figure 2-15 shows the solder-side view of a mating connector. Connection and installation procedures are to be performed by qualified service personnel.

  • Page 27: Introduction

    Operation Introduction Output channels: Maximum User Supplied Pull-Up Voltage: 25V. The information in this section is organized as follows: Maximum Sink Current: • Power limits — Covers the maximum power limits of Per channel: 65mA the Model 7020 Digital I/O Interface Card. Per bank: 500mA (see note).

  • Page 28: Channel Assignments

    Operation 7001 DISPLAY CARD 1 CARD 2 = OPEN CHANNEL = CLOSED CHANNEL Figure 3-1 Model 7001 channel status display the right portion is for slot 2 (Card 2). For the Model 7002, channel status LED grids are used for the 10 slots. The LED grid for slot 1 is shown in Figure 3-2.

  • Page 29: Controlling Output Channels

    Operation 1!10 1!11 1!12 1!13 1!14 1!15 1!16 21!17 1!18 1!19 1!20 1!21 1!22 1!23 1!24 1!25 1!26 1!27 1!28 1!29 1!30 A. SLOT 1 1!31 1!32 1!33 1!34 1!35 1!36 1!37 1!38 1!39 1!40 (CARD 1) 2!10 2!11 2!12 2!13 2!14 2!15...

  • Page 30: Scanning Output Channels

    Bus operation is demonstrated using Microsoft QuickBASIC from the SAVESETUP menu of the main MENU. When RE- 4.5, the Keithley KPC-488.2 (or Capital Equipment Corpo- SET is performed, the mainframe is configured for an infinit ration) IEEE interface and the HP-style Universal Language number of manual scans.

  • Page 31: Scanning Output Channels

    Operation Either of the following statements turns off channels 1!1, 1!4 PRINT #1, "output 07; trig:del 0.5" through 1!6, and the channels of M1: PRINT #1, "output 07; scan (@ 1!1:1!4, M1)" PRINT #1, "output 07; init" PRINT #1, "output 07; open (@ 1!1, 1!4:1!6, M1)" PRINT #1, "output 07;...
  • Page 32 Operation The response message will include a “0” (off) or “1” (on) for PRINT #1, "output 07; sens2:data? (@1:40)" each of the 40 input channels (i.e. “0, 0, 0, 1, 0..0, 1”). PRINT #1, "enter 07" LINE INPUT #2, A$ PRINT A$...

  • Page 33: Introduction

    Service Information Handling and cleaning WARNING The information in this section is in- Care should be taken when handling or servicing the card to tended only for qualified service person- prevent possible contamination. The following precautions should be taken when servicing the card. nel.

  • Page 34: Static-Sensitive Devices

    Service Information 5. Use only anti-static type de-soldering tools and OUTPUT CHANNEL INPUT CHANNEL grounded-tip soldering irons. Principles of operation The following paragraphs discuss the basic operating princi- ples for the Model 7020, and can be used as an aid in trou- bleshooting the card.

  • Page 35: Output Channel Control

    Service Information 1. The ID DATA line (pin 5 of U107) is set from high to Output channel control low while the ID CLK line (pin 6 of U107) is held high. This action initiates a start command to the ROM to Digital output channels are controlled by serial data transmit data serially to the mainframe (Figure 4-3).

  • Page 36: Input Channel Control

    (via INDATA line) to the mainframe. As data empties from Description and model Application the lead register (U100), it is replaced by data via the Q7 line Multimeter Keithley 2000 Measure DC voltages of the registers down the chain. Oscilloscope TEK 2243 View logic waveforms Note that a channel is on (closed) when the input is high.
  • Page 37 Service Information Table 4-2 Troubleshooting procedure Step Item/component Required condition Comments GND pad All voltages referenced to digital ground (GND pad). +5V pad +5.3VDC Logic voltage. U107, pin 6 ID CLK pulses During power-up only. U107, pin 5 ID DATA pulses During power-up only.
  • Page 38 Service Information...

  • Page 39: Introduction

    Replaceable Parts Introduction Factory service This section contains replacement parts information, sche- If the card is to returned to Keithley Instruments for repair, matic diagrams and component layout drawings for the perform the following: Model 7020. • Call the Repair Department at 1-800-552-1115 for a Return Material Authorization (RMA) number.
  • Page 40 Replaceable Parts Table 5-1 Model 7020 mass terminal board, parts list Circuit Desig. Description Keithley Part Number BRACKET SILKSCREENING 7011-318-6A CONNECTOR SHIM 7011-309A SHIELD 7011-311A C401-404 CAP., 1UF,20%,50V,CERAMIC C-365-.1 J1004 CONN, 96-PIN, 3 ROWS CS-514 P1002,1003 CONNECTOR, 48-PIN, 3 ROWS...
  • Page 41 D R N APPR. C A B MASS TERMINATED CARD DIM. TOL. UNLESS OTHERWISE SPECIFIED KEITHLEY INSTRUMENTS INC. X X=+ .0 1 A N G . = + 1 7 0 2 0 - 1 7 0 CLEVELAND, OHIO 44139 DO NOT SCALE THIS DRAWING X X X = + .
  • Page 48 Controlling devices using pull-up Troubleshooting access resistors Troubleshooting procedure Controlling output channels Turning output channels On and Controlling pull-up devices Models 7020-D and 7020-DT Off 3-3, Typical connection techniques Typical input connection scheme Typical output connection schemes Digital I/O configuration Parts lists...
  • Page 50 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 ❏ ❏...
  • Page 53 Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments, Inc. All other trademarks and trade names are the property of their respective companies. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 Keithley Instruments, Inc.

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