IOtech Isolator488 Скачать руководство пользователя страница 13 | Manualshive

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Section 2

Getting Started

2.3

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Содержание Isolator488

Страница 1: ...uy your excess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing R...

Страница 2: ...Isolator488 IEEE 488 Bus Isolator USER S MANUAL IOtech Inc 25971 Cannon Road Cleveland Ohio 44146 440 439 4091...

Страница 3: ...ply with the safety and emissions standards of the European Community As applicable we ship these products with a Declaration of Conformity stating which specifications and operating conditions apply...

Страница 4: ...Isolator488 Instruction Manual Part No Isolator488 901 Revision 1 2 December 1991 IOtech Inc 25971 Cannon Road Cleveland Ohio 44146 440 439 4091...

Страница 5: ...f the IEEE 488 cables attached to the Isolator488 and signal ground pins may be at a high voltage with respect to earth ground Be sure to remove power from all devices in your system before handling I...

Страница 6: ...2 6 2 Cabling Length 2 11 2 6 3 Signal Line Direction 2 12 2 6 4 Parallel Polling 2 13 2 6 5 Passing Control 2 13 Section 3 IEEE 488 Primer Page 3 1 History 3 1 3 2 General Structure 3 1 3 3 Send It T...

Страница 7: ...7 9 Serial Poll Disable SPD 3 10 3 7 10 Serial Poll Enable SPE 3 10 3 7 11 Group Execute Trigger GET 3 10 3 7 12 Take Control TCT 3 10 3 7 13 Secondary Command Group SCG 3 10 3 7 14 Parallel Poll Conf...

Страница 8: ...tor488 and has no effect on bus data transfer rates Two IEEE ports are provided One connects directly to the controller s IEEE bus the other to an additional 14 instruments printers plotters and speci...

Страница 9: ...DAC Bidirectional Command Lines SRQ ATN REN IFC To Local Bus ATN To Remote Bus EOI Bidirectional CONNECTORS Two IEEE 488 connectors with metric studs INDICATORS LED for Power POWER 105 125V or 210 250...

Страница 10: ...ET Group Execute Trigger GTL Go To Local LA Listener Active LAG Listen Address Group LF Line Feed LLO Local Lock Out MLA My Listen Address MTA My Talk Address PPC Parallel Poll Configure PPU Parallel...

Страница 11: ...Isolator488 IEEE Bus Isolator 123 0900 Instruction Manual 123 0800 Accessory Kit includes power cable fuse and rack mounting hardware 2 2 Configuration Before using the Isolator488 you should be awar...

Страница 12: ...Instruments may be connected to this port Instruments connected to the Instrument Port may be isolated from devices on the Controller Port depending on the internal configuration of the Isolator 488...

Страница 13: ...Section 2 Getting Started 2 3...

Страница 14: ...ctory configuration is not appropriate for your application the following procedures may be undertaken to modify the Isolator488 It is necessary to open the enclosure to make any of the following chan...

Страница 15: ...Section 2 Getting Started 2 5 F2 JPR1 R4 C16 C47 C48 JPR2 F3 R5 C49 C50 C59 TO CONTROLLER TO INSTRUMENTS Controller Port Common Components Instrument Port Common Components Isolator488 Internal View...

Страница 16: ...ote of this change for later reference 2 To connect Controller common to earth ground insert a 1 2 amp fuse in the fuse clips labelled F2 The 1 2 amp fuse connects the Controller common to earth groun...

Страница 17: ...lly reassemble the unit 2 4 Line Voltage Selection The Isolator 488 is designed to accept either 105 to 125 volt or 210 to 250 volt 50 or 60 Hz AC power Each unit when shipped from the factory is labe...

Страница 18: ...ft or right so that the desired line voltage selection appears on the switch Make note of the new setting for later reference CAUTION Use the 1 2 amp fuse FU 1 5 for 115 volt operation Use the 1 4 amp...

Страница 19: ...e ears can be installed so either the front or the rear of the unit faces the front of the rack fixture View of Enclosure showing Rack Hardware Installation Enclosure Rack Ear Top View 2 per ear Enclo...

Страница 20: ...ystem Once all IEEE devices have been connected and powered on the Isolator488 will allow the system controller to command up to 13 IEEE devices on its Controller Port in addition to itself and the Is...

Страница 21: ...onal Handshake Lines DAV Bidirectional NRFD Bidirectional NDAC Bidirectional Command Lines SRQ To Controller Bus ATN To Instrument Bus EOI Bidirectional REN To Instrument Bus IFC To Instrument Bus The...

Страница 22: ...seconds to allow the data lines to settle before releasing the NDAC lines Once changed data transfers to 1 megabyte per second are possible 2 6 4 Parallel Polling During data transfer operations the d...

Страница 23: ...tware that is specific to the measurement application 3 2 GENERAL STRUCTURE The main purpose of the GPIB is to transfer information between two or more devices A device can either be an instrument or...

Страница 24: ...d every student receives all the information he is trying to present Since there are a lot of students in the classroom this exchange of information can be very slow In fact the rate of information tr...

Страница 25: ...vices Device 1 System Controller Able to Talk Listen and Control Device 2 DMM Able to Talk and Listen Device 3 Printer Only Able to Listen Device 4 Frequency Counter Only Able to Talk Data Bus Data By...

Страница 26: ...t the address Addresses are sent with universal multiline commands from the Active Controller These commands include My Listen Address MLA My Talk Address MTA Talk Address Group TAG and Listen Address...

Страница 27: ...m Controller has control of the Remote Enable line 3 4 4 End or Identify EOI The EOI line is used to signal the last byte of a multibyte data transfer The device that is sending the data asserts EOI d...

Страница 28: ...high which indicates that all Addressed Listeners are ready to accept the information When NRFD and NDAC are in the proper state the Talker asserts DAV active low to indicate that the data on the bus...

Страница 29: ...lines for a bit parallel byte serial data transfer These eight data lines use the convention of DIO1 through DIO8 instead of the binary designation of D0 to D7 The data lines are bidirectional and are...

Страница 30: ...to Listen 3F 3 7 4 Talk Address Group TAG There are 31 0 to 30 talk addresses associated with this group The 3 most significant bits of the data bus are set to 010 while the 5 least significant bits a...

Страница 31: ...s byte after SPE is sent and ATN is unasserted 18 3 7 11 Group Execute Trigger GET This command usually signals a group of devices to begin executing a triggered action This allows actions of differen...

Страница 32: ...er has easy access to this line by most devices Service Request is the method by which a bus device can signal to the Controller that an event has occurred It is similar to an interrupt in a microproc...

Страница 33: ...the Controller can determine which device requested service It provides the who but not necessarily the why When bus devices are configured for Parallel Poll they are assigned one bit on the data bus...

Страница 34: ...d Ohio If problems are encountered in using the Expander488 you should first telephone the factory Many problems can be resolved by discussing the problems with our applications department If the prob...

Страница 35: ...04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 UNL 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 UNT SCG SCG SCG SCG SC...

Страница 36: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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