Installation Guidelines - Siemens SIMATIC S5 Manual

IP 266
3

Installation Guidelines

3.1 Safety Requirements
It is absolutely essential to the overall safety concept that the switching elements
discussed in the following be installed and matched to your system.
• EMERGENCY STOP switch for shutting down the entire system.
• Hardware limit switches for restricting the traversing range.
These switches initiate a preprogrammed deceleration procedure, and can be
connected as NC or NO contacts to the IP 266's digital inputs.
• EMERGENCY limit switches for a direct shutdown of the power section. These
switches are not reached until the hardware switches have been overrun.
The failsafe switches for the power section must be designed as NC contacts
(e. g. failsafe shutdown in the event of a wirebreak).
EWA 4NEB 812 6057-02
W A R N I N G !
Installation Guidelines
3-1