OK guys I have an application that will be a retrofit. I DID NOT DESIGN THE FIRST SYSTEM. This is a loading system. The operator unloads a barrel from a truck to a machine.
This is in a class 1 div 2 area. The current light curtain-ish type of configuration is a row of retro-reflective photoeyes. If there is product in the way of the photoeyes the machine will not run. Once the product is no longer in the way a machine can run.
The customer wants a to use a light curtain in a configuration that if the light is blocked the machine will not move. If the light curtain is blocked for an extended amount if time the system will go into a global shutdown.
AB safety processor. I'm thinking of 2 safety functions. 1st function just to stop the machine motion with an automatic reset. The 2nd would be after xx.xx seconds the stop would be global and a manual reset to verify the work cell was clean of people.
The risk assessment states the a presence sensing device should be used and the machine should not run when blocked.
What am I missing? I think I have everything covered.
This is in a class 1 div 2 area. The current light curtain-ish type of configuration is a row of retro-reflective photoeyes. If there is product in the way of the photoeyes the machine will not run. Once the product is no longer in the way a machine can run.
The customer wants a to use a light curtain in a configuration that if the light is blocked the machine will not move. If the light curtain is blocked for an extended amount if time the system will go into a global shutdown.
AB safety processor. I'm thinking of 2 safety functions. 1st function just to stop the machine motion with an automatic reset. The 2nd would be after xx.xx seconds the stop would be global and a manual reset to verify the work cell was clean of people.
The risk assessment states the a presence sensing device should be used and the machine should not run when blocked.
What am I missing? I think I have everything covered.