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    Instrumentation Cables Manufacturer

    We engineer and manufacture instrument cables for the test and measurement industry. In addition to OEM instruments cables, we provide industrial automation and process control cables. In this context, one of our specialties is GPIB cable (General Purpose Interface Bus) or IEEE 488 cable design and manufacturing. 

     Please see below some of the key types of instrument cables we offer:

       Multi-meter cables
       Instruments cables for Oscilloscopes, Spectrum analyzers, Signal generators
       Laboratory equipment / Lab instrument cables
       Double-Shielded  GPIB Cable
       GPIB interface for digital logic analyzers
       Temperature measurement instruments cables
       Infrared thermometers, Infrared cameras
       Weighing Scales  cables
       Humidity measurement instrument cables
       Gas detectors and Gas analyzers
       Metrology equipment
       Shielded  GPIB Cables
       GPIB Cable, Double-Shielded, Standard to Right-Angle
       GPIB interface Instrument Cables – with  Shielded Plug/Receptacles
       Metrology GPIB cable
       GPIB cable for HPIB equipment (Hewlett Packard Interface Bus)
       Industrial vision, Video cameras cable
       Cables for Recorders & Data acquisition devices

    Instrument Cables - GPIB tutorial  

    The GPIB / IEEE 488 interface bus, also known as the General Purpose Interface Bus "GPIB," is well established in the electronics industry.  It represents a robust means of providing control of remote test and measurement instruments via high quality instruments cables. Although the GPIB cable interface has been in widespread use since the early 1970s, the use of the GPIB interface is finding new vitality in view of its convenience and availability. The GPIB cable and GPIB connectors are in widespread use and are available from many stockists and suppliers. 

    The GPIB interface is an 8 bit parallel interface system which incorporates:

       5 control lines
       3 handshake lines
       8 bi-directional data lines

    The GPIB cable consists of 24 lines, with the remaining lines occupied by ground wires. The maximum data transfer rate is determined by a number of factors, but is about 1Mb/s. 

    talk-live-to-a-tech

    GPIB Interface Connectors

    The connector used for the IEEE 488 bus is standardized as a 24-way Amphenol 57 series type. This provides an ideal physical interface for the standard. The IEEE 488 or GPIB connector is very similar in format to those that were used for parallel printer ports on PCs. This makes the GPIB cable a sufficiently rugged connection for use in a variety of test equipment and test and measurement environments where unprotected connectors may not survive well. 

    An additional advantage of the GPIB connector is that it has a screw-lock. In this way, once the connectors have been mated the screw-lock can be used to secure the connectors together. In this way movements of the GPIB cables are unlikely to cause any intermittent connections. With complicated electronics systems such as automatic test systems, intermittent signals in instrument cables can cause significant problems which can be difficult to isolate and cure. By using a GPIB connector that has a screw-lock this problem can be overcome. 

    The basic female connector used on the GPIB cable applications follows the standard format for the Amphenol57 series, however, the GPIB cable connector has some differences. The basic GPIB cable connector has a male to female capability. In this several GPIB cables connectors can be "piggy-backed" on top of each other. This helps the physical setting up of the bus and prevents complications with special connection boxes or star points, etc. 

    There are two different types of screwlockused on the GPIB cables. The metric threads are Black whereas English threads are Silver. Unfortunately the two will not mate together. The most common type of screwlock is the black metric version. 

    GPIB Connector Pinout 

    24-Pin GPIB Bus PinOut [IEEE488 Pinout]

    Pin #

    Signal Names

    Signal Description

    Pin #

    Signal Names

    Signal Description

    1

    DIO1

    Data Input/Output Bit 1

    13

    DIO5

    Data Input/Output Bit 5

    2

    DIO2

    Data Input/Output Bit 2

    14

    DIO6

    Data Input/Output Bit 6

    3

    DIO3

    Data Input/Output Bit 3

    15

    DIO7

    Data Input/Output Bit 7

    4

    DIO4

    Data Input/Output Bit 4

    16

    DIO8

    Data Input/Output Bit 8

    5

    EIO

    End-Or-Identify

    17

    REN

    Remote Enable

    6

    DAV

    Data Valid

    18

    Shield

    Ground (DAV)

    7

    NRFD

    Not Ready For Data

    19

    Shield

    Ground (NRFD)

    8

    NDAC

    Not Data Accepted

    20

    Shield

    Ground (NDAC)

    9

    IFC

    Interface Clear

    21

    Shield

    Ground (IFC)

    10

    SRQ

    Service Request

    22

    Shield

    Ground (SRQ)

    11

    ATN

    Attention

    23

    Shield

    Ground (ATN)

    12

    Shield

    Chassis Ground

    24

    Single GND

    Single Ground

    GPIB cables

    In practice the GPIB interface is very robust and easy to use for instrument cables. Ready-made GPIB cables are available even if they appear to be a little expensive. However these GPIB cables are fully screened and have the correct lines as twisted pairs. This considerably reduces the susceptibility of the bus to data corruptions. The manufacturing of a full specification GPIB cable can be somewhat costly in view of the complexity of the cable and having to ensure the integrity of the screening 

    IEEE-488 Cable Guidelines

    Although there is a considerable degree of flexibility when setting up a GPIB interface, there are some restrictions on the way the GPIB instrument cables are set up. Up to fifteen instruments may be connected together with a maximum bus length not exceeding 20 meters. There must also be no more than 2 meters between any two instruments. Devices on the GPIB can be connected in either a star or linear configuration. 

     

     

     

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