KEI 7020 Operation 电路图.pdf

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1、Model 7020 Digital I/O Interface Card Instruction Manual A G R E A T E RM E A S U R E O F C O N F I D E N C E RadioFans.CN 收音机爱 好者资料库 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 I

2、nstruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation. During the warranty period, we will, at our option, either repair or replace any product that proves to be defective. To exercise this warranty,

3、write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. You will be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs will be made and the product returned, transportati

4、on prepaid. Repaired or replaced products are warranted for the balance of the original warranty period, or at least 90 days. LIMITATION OF WARRANTY This warranty does not apply to defects resulting from product modifi cation without Keithleys express written consent, or misuse of any product or par

5、t. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery leakage, or problems arising from normal wear or failure to follow instructions. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANT

6、ABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PRO- VIDED HEREIN ARE BUYERS SOLE AND EXCLUSIVE REMEDIES. NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS

7、 AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIM- ITED TO: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY. Keithley

8、Instruments, Inc. 28775 Aurora Road Cleveland, OH 44139 440-248-0400 Fax: 440-248-6168 BELGIUM:Keithley Instruments B.V. Bergensesteenweg 709 B-1600 Sint-Pieters-Leeuw 02/363 00 40 Fax: 02/363 00 64 CHINA:Keithley Instruments China Yuan Chen Xin Building, Room 705 12 Yumin Road, Dewai, Madian Beijin

9、g 100029 8610-62022886 Fax: 8610-62022892 FRANCE:Keithley Instruments Sarl 3, alle des Garays 91127 Palaiseau Cedex 01-64 53 20 20 Fax: 01-60 11 77 26 GERMANY:Keithley Instruments GmbH Landsberger Strasse 65 82110 Germering 089/84 93 07-40 Fax: 089/84 93 07-34 GREAT BRITAIN:Keithley Instruments Ltd

10、Unit 2 Commerce Park, Brunel Road Theale Reading Berkshire RG7 4AB 0118 929 7500 Fax: 0118 929 7519 INDIA:Keithley Instruments GmbH Flat 2B, WILOCRISSA 14, Rest House Crescent Bangalore 560 001 91-80-509-1320/21 Fax: 91-80-509-1322 ITALY:Keithley Instruments s.r.l. Viale S. Gimignano, 38 20146 Milan

11、o 02-48 39 16 01 Fax: 02-48 30 22 74 NETHERLANDS:Keithley Instruments B.V. Postbus 559 4200 AN Gorinchem 0183-635333 Fax: 0183-630821 SWITZERLAND:Keithley Instruments SA Kriesbachstrasse 4 8600 Dbendorf 01-821 94 44 Fax: 01-820 30 81 TAIWAN:Keithley Instruments Taiwan 1 Fl. 85 Po Ai Street Hsinchu,

12、Taiwan, R.O.C. 886-3572-9077 Fax: 886-3572-903 4/01 RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 M

13、anual Print History The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The Revision Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between Revisions, contain important change info

14、rmation that the user should incorporate immediately into the manual. Addenda are numbered sequentially. When a new Revision is created, all Addenda associated with the previous Revision of the manual are incorporated into the new Revision of the manual. Each new Revision includes a revised copy of

15、this print history page. Revision A (Document Number 7020-901-01). April 1995 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 pro

16、duct names are trademarks or registered trademarks of their respective holders. Safety Precautions The following safety precautions should be observed before using this product and any associated instrumentation. Although some in- struments and accessories would normally be used with non-haz- ardous

17、 voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualifi ed personnel who recog- nize shock hazards and are familiar with the safety precautions re- quired to avoid possible injury. Read the operating information carefully before using th

18、e product. The types of product users are: Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is operated within its specifi cations and operating limits, and for en- suring that operators are adequately trained. Operator

19、s use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instru- ment. They must be protected from electric shock and contact with hazardous live circuits. Maintenance personnel perform routine procedures on the product to keep it operat

20、ing, for example, setting the line voltage or replac- ing consumable materials. Maintenance procedures are described in the manual. The procedures explicitly state if the operator may per- form them. Otherwise, they should be performed only by service personnel. Service personnel are trained to work

21、 on live circuits, and perform safe installations and repairs of products. Only properly trained ser- vice personnel may perform installation and service procedures. Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation Category II, as

22、 de- scribed in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data I/O sig- nals are Installation Category I and must not be directly connected to mains voltage or to voltage sources with high transient over-volt- ages. Installation Category I

23、I connections require protection for high transient over-voltages often associated with local AC mains connections. The user should assume all measurement, control, and data I/O connections are for connection to Category I sources un- less otherwise marked or described in the Manual. Exercise extrem

24、e caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fi xtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are present. A good safety practice is

25、 to expect that hazardous voltage is present in any unknown circuit before measuring. Users of this product must be protected from electric shock at all times. The responsible body must ensure that users are prevented access and/or insulated from every connection point. In some cases, connections mu

26、st be exposed to potential human contact. Product users in these circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed. Do not connect switching cards direct

27、ly to unlimited power circuits. They are intended to be used with impedance limited sources. NEVER connect switching cards directly to AC mains. When con- necting sources to switching cards, install protective devices to lim- it fault current and voltage to the card. Before operating an instrument,

28、make sure the line cord is connect- ed to a properly grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use. When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate

29、main input power dis- connect device must be provided, in close proximity to the equip- ment and within easy reach of the operator. For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. ALWAYS remove power from the entir

30、e test system and discharge any capacitors before: connecting or disconnecting cables or jump- ers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers. Do not touch any object that could provide a current path to the com- mon side of the circui

31、t under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured. The instrument and accessories must be used in accordance with its specifi cations and operating instructions or the safet

32、y of the equip- ment may be impaired. Do not exceed the maximum signal levels of the instruments and ac- cessories, as defi ned in the specifi cations and operating informa- tion, and as shown on the instrument or test fi xture panels, or switching card. When fuses are used in a product, replace wit

33、h same type and rating for continued protection against fi re hazard. Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections. If you are using a test fi xture, keep the lid closed while power is ap- plied to the device under test. S

34、afe operation requires the use of a lid interlock. If a screw is present, connect it to safety earth ground using the wire recommended in the user documentation. The symbol on an instrument indicates that the user should re- fer to the operating instructions located in the manual. The symbol on an i

35、nstrument shows that it can source or mea- sure 1000 volts or more, including the combined effect of normal and common mode voltages. Use standard safety precautions to avoid personal contact with these voltages. The WARNING heading in a manual explains dangers that might result in personal injury o

36、r death. Always read the associated infor- mation very carefully before performing the indicated procedure. The CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may invalidate the warranty. Instrumentation and accessories shall not be connected to humans. Be

37、fore performing any maintenance, disconnect the line cord and all test cables. To maintain protection from electric shock and fi re, replacement components in mains circuits, including the power transformer, test leads, and input jacks, must be purchased from Keithley Instru- ments. Standard fuses,

38、with applicable national safety approvals, may be used if the rating and type are the same. Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component. (Note that se- lected parts should be purchased only through Keithl

39、ey Instruments to maintain accuracy and functionality of the product.) If you are unsure about the applicability of a replacement component, call a Keithley Instruments offi ce for information. To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrumen

40、t only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no case or chassis (e.g., data acquisition board for installation into a computer) should never require cleaning if handled according to in- str

41、uctions. If the board becomes contaminated and operation is af- fected, the board should be returned to the factory for proper cleaning/servicing. ! 2/01 DIGITAL I/O CAPABILITY: Forty independent inputs. Forty independent outputs. OUTPUT SPECIFICATIONS: Configuration: 40 open collector drivers with

42、factory installed 10k pull up resistors. Pull-up resistors can be removed when driving external pull-up devices. Each driver has an internal fly- back diode. Pull up Voltage: 5.3V Internally supplied, external connection pro- vided for user supplied voltage 25V max. Removal of internal jumper allows

43、 user to use two different pull-up voltages. Maximum Sink Current: Per Channel: 65mA. Per Bank (8 bits): 500mA. Per Card: 1A. Current Limit: Positive Temperature Coefficient circuit protector in series with each output. Output protection resistance 18. Collector-Emitter Saturation Voltage: 0.75V 1mA

44、. 1V 65mA. Logic: Negative True. INPUT SPECIFICATIONS: Configuration: 40 inputs with internal 10k pull-up resistors pro- vided. Characteristics: Input logic low voltage:0.8V max. Input logic high voltage:2V min. Input logic low current:600A max. 0V Input logic high current:50A max. 5V Maximum Voltag

45、e Level: 42V pk. Logic: Positive True. 7020/7020-D General Specifications CONNECTOR: 7020:96-pin male DIN connector. 7020-D:Cables with 50-pin male and female D-sub connectors. ENVIRONMENT:Operating: 0 to 50C, up to 35C 80% RH. Storage: 25 to 65C. 7020 and 7020-D Digital I/O Interface Cards Output R

46、2 R1 5.3VVEXTERNAL GND R1 = Pull-up Resistor = 10k R2 = Output Protection 18 Output Channel Input R2 5V GND R1 = Pull-up Resistor = 10k R2 = Input Protection = 100k Input Channel R1 Specifications are subject to change without notice. i 1 Digital I/O Confi guration 1.1Introduction. 1-1 1.2Digital outputs. 1-1 1.3Controlling pull-up devices. 1-1 1.4Controlling devices using pull-up resistors. 1-1 1.5Digital inputs.