The same requirements apply for all e-stop devices. Let’s take a case with a single e-stop button first. This shall also apply to the effect of isolation and energy dissipation. When zones can be determined, their delimitations shall be evident (including the effect of the associated emergency stop device). The control requirements shall be based on the operational requirements and on the risk assessment.The interfaces between zones, including synchronization and independent operation, shall be designed such that no function in one zone creates a hazard(s) / hazardous situation in another zone.ĬSA Z432-04 has similar wording: 6.2.1.8.4 Controls for machines in zones can be local for each machine, across several machines in a zone, or globally for machines across zones. The machine and controls in different zones shall be defined and identified.
Resetting the e-stop device is NOT permitted to re-start the machinery, only to permit restarting. button, pull cord, foot switch, etc., is required to latch in the activated state and must be individually reset.
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