I.S. EN 60870-2-2:1999

Foreword
Introduction
1 Scope and object
2 Normative references
3 Climatic conditions
  3.1 General
  3.2 Types of location
      3.2.1 Air-conditioned locations (class A)
      3.2.2 Heated or/and cooled enclosed location (class B)
      3.2.3 Sheltered locations (class C)
      3.2.4 Outdoor locations (class D)
  3.3 Classes of climatic parameters
      3.3.1 Temperature, humidity, solar radiation,
            condensation, wind, rain, snow, frost, ice
      3.3.2 Air pressure
4 Mechanical influences
  4.1 General
  4.2 Type of locations and transportation conditions
      4.2.1 Light installation and storage conditions
            (class A[m])
      4.2.2 Normal installation and storage
            conditions, light transport (class B[m])
      4.2.3 Severe installation and storage conditions,
            normal transport (class C[m])
      4.2.4 Critical installation conditions, severe
            transport (class D[m])
  4.3 Classes of mechanical parameters
  4.4 Seismic effects (earthquakes)
      4.4.1 Quantification of earthquakes
5 Other influences
6 Climatic and mechanical tests
Annexes
A Interdependence of air temperature, relative
    humidity and absolute humidity
B Phenomena of earthquakes related to the scales
    of Richter and Mercalli

Applies to telecontrol equipment and systems with coded bit serial data transmission for monitoring and control of geographically widespread processes. Specifies classes for environmental conditions under which the various components of the systems have to operate.