General information
Generally, all the connection variants listed in this documentation are permitted for safety-relevant applications as long as the basic safety concept is met. This means you have to make sure that the DC 24 V safety inputs are operated by an external safety relay or safety controller, in this way preventing an automatic restart.
All safety-relevant conditions mentioned in chapters 2, 3 and 4 of the documentation in hand must be met for the basic selection, installation, and application of the safety components, such as safety relay, emergency off switch, etc., and the approved connection variants.
The wiring diagrams are block diagrams whose only purpose is to show the safety function(s) with the relevant components. Circuit-related measures, which usually always have to be implemented additionally, are not shown in the diagrams to enhance clarity. Such measures are taken, for example, to ensure protection against contact, to handle overvoltage and undervoltage, to detect insulation faults, line-to-ground faults and short circuits, which can occur on externally installed lines, or to ensure the necessary immunity against electromagnetic interference.
