Table of Contents

1 Overview
  1.1 Scope
  1.2 Object
  1.3 Interface system overview
2 References
3 Definitions
  3.1 General system terms
  3.2 Units connected via the interface system
  3.3 Signals and paths
4 Functional specifications
  4.1 Functional partition
  4.2 Notation used to specify interface functions
  4.3 Source handshake (SH) interface function
  4.4 Acceptor handshake (AH) and extended acceptor handshake
       (AHE) interface functions
  4.5 Talker (T) interface function (Includes serial poll
       capabilities)
  4.6 Listener (L) interface function
  4.7 Service request (SR) interface function
  4.8 Remote local (RL) interface function
  4.9 Parallel poll (PP) interface function
  4.10 Device clear (DC) interface function
  4.11 Device trigger (DT) interface function
  4.12 Controller (C) interface function
  4.13 Remote message coding and transfer
  4.14 Configuration (CF) interface function
5 Electrical specifications
  5.1 Application
  5.2 Logical and electrical state relationships
  5.3 Driver requirements
  5.4 Receiver requirements
  5.5 Composite device load requirements
  5.6 Ground requirements
  5.7 Cable characteristics
  5.8 State transition timing values
6 Mechanical specifications
  6.1 Application
  6.2 Connector type
  6.3 Connector contact assignments
  6.4 Device connector mounting
  6.5 Cable assembly
7 System applications and guidelines for the designer
  7.1 System compatibility
  7.2 Data rate consideration
  7.3 Device capabilities
  7.4 AND and OR logic operations
  7.5 Address assignment
  7.6 Typical combinations of interface functions
  7.7 Unimplemented interface message handling
8 System requirements and guidelines for the user
  8.1 System compatibility
  8.2 System installation requirements
  8.3 Address assignment
  8.4 Cabling restrictions
  8.5 Operational sequence guidelines
Annex A (informative) - Typical instrument system
Annex B (informative) - Handshake process timing sequence
Annex C (informative) - Interface function-allowable subsets
Annex D (informative) - Interface message reference list
Annex E (informative) - Multiline interface messages: ISO code
        representation
Annex F (informative) - Logic circuit implementation
Annex G (informative) - Parallel polling sequence
Annex H (informative) - Description of interface parameters on
        data sheets
Annex I (informative) - Holdoff considerations for noninterlocked
        transfers
Annex J (informative) - Address switch labeling and interface status
        indicators
Annex K (informative) - Recommended methods for reducing the effects
        of radiated and conducted interference for devices specified
        in this standard

Abstract

Specifies interface systems used to interconnect both programmable and nonprogrammable electronic measuring apparatus with other apparatus and accessories necessary to assemble instrumentation systems. It applies to the interface of instrumentation systems, or portions of them, in which the: a) Data exchanged among the interconnected apparatus is digital (as distinct from analog); b) Number of devices that may be interconnected by one contiguous bus does not exceed 15; c) Total transmission path lengths over the interconnecting cables does not exceed 20 m; d) Data rate among devices does not exceed 8 000 000 B/s.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Committee	TC-8