DIN 56950:2005-04

Foreword
Introduction
1 Scope
2 Normative references
3 Concepts
  3.1 General terms
  3.2 Loads and forces
  3.3 Electrical equipment
  3.4 Tolerances relating to movement
  3.5 Machine group travel
  3.6 Examples of machinery installations
4 Hazards
5 Design requirements
  5.1 Load assumptions
  5.2 Load bearing equipment and structural elements
  5.3 Load carrying devices
6 Safeguarding hazardous areas
  6.1 Protective spaces
  6.2 Safeguarding at crushing, shearing and trapping
       points, and fall protection
  6.3 Accessibility of maintenance areas
  6.4 Elevator shaft walls, openings and landing doors
  6.5 Counterweights
7 Electrical equipment and control systems
  7.1 General requirements
  7.2 Incoming supply conductor terminations and devices
       for disconnecting and switching off
  7.3 Protection against electric shock
  7.4 Protection of equipment
  7.5 Protection against overvoltages of atmospheric
       origin (lightning protection) and avoidance of
       potential differences
  7.6 Control circuits and control functions
  7.7 Safety functions and control functions in the event
       of failure
  7.8 Emergency stop and emergency switching-off functions
  7.9 Electronic and programmable electronic systems
  7.10 Use of programmable electronic systems (E/PES)
       without safety functions
  7.11 Operator interfaces, control devices and contactors
  7.12 Conductors and cables
  7.13 Wiring practices
  7.14 Electric motors and associated equipment
  7.15 Accessories and lighting
  7.16 Marking, warning signs and reference designations
  7.17 Technical documentation
  7.18 Testing and verification of characteristics
8 Information for use
  8.1 General
  8.2 Technical data to be included
  8.3 Marking
  8.4 Instruction handbook
9 Testing prior to commissioning
Annex A (normative) Examples of hazards, hazardous
        situations and hazardous events associated
        with machinery installations as in this standard
Annex B (normative) Designing safeguards on the basis of
        risk assessment
        B.1 Introduction
Annex C (informative) Examples of using the risk graph
        in DIN EN 61508-5
        C.1 EXAMPLE 1: Use of a programmable logic controller
            (PLC) which is used solely for selection
            functions, selected on the basis of a risk graph
        C.2 EXAMPLE 2: Use of an unregulated three-phase
            asynchronous motor for moving loads, with double
            brake, selected on the basis of a risk graph
        C.3 EXAMPLE 3: Use of an electrical measuring system
            to determine the nominal load, selected
            on the basis of a risk graph
        C.4 EXAMPLE 4: Use of a computerized control system
            to provide protection when the synchronization
            tolerance is exceeded during synchronous travel
            of two hoists, selected on the basis of a risk
            graph

Relates to machinery installations used in places of assembly and in staging and production facilities for events and theatrical productions (stage machinery, for short).