Hi Folks,

The EC Machinery Directive 1.2.2. Control devices states

"Machinery must be fitted with indicators as required for safe operation. The 
operator must be able to read
them from the control position.

>From each control position, the operator must be able to ensure that no-one is 
>in the danger zones, or the
control system must be designed and constructed in such a way that starting is 
prevented while someone is in
the danger zone.

If neither of these possibilities is applicable, before the machinery starts, 
an acoustic and/or visual warning
signal must be given. The exposed persons must have time to leave the danger 
zone or prevent the machinery
starting up."

EN 60204-1 Safety of Machinery Standard does not identify specific requirements 
for a startup warning however it does provide the generic requirements for 
indication in 10.3.3 Flashing lights and displays.

My question is does anyone know of any similar requirements for visual and/or 
audible machine start warnings like last paragraph in MD 1.2.2 that are 
required by OSHA or other USA requirements?  I've not found anything like this 
in NFPA 79 or any OSHA regulations.  I suspect it's there somewhere but I've 
not found it yet.   thanks

David P. Nyffenegger, PMP, SM-IEEE
Product Development Manager

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