Every effort has been made to incorporate these standards into the design of the Powder Hopper Loading system; however, it is the responsibility of the personnel operating and maintaining the equipment to familiarize themselves with the safety procedures and the proper use of any safety devices.
2-8-3 Fail Safe Operation
If a safety device or circuit should fail, the design must be such that the failure causes a “Safe” condition. As an example, a safety switch must be a normally open switch. The switch must be held closed with the device it is to protect. If the switch fails, it will go to the open condition, tripping out the safety circuit.
At no time should the safety device fail and allow the operation to continue. For example, if a safety switch is guarding a motor, and the safety switch fails, the motor should not be able to run.
2-8-4 Safety Device Lock-Outs
Some safety devices disconnect electrical energy from a circuit. The safety devices that are utilized on powder hopper loader models are primarily concerned with the pneumatics and electrical power disconnection, and the disabling of moving parts that may need to be accessed during the normal operation of the machine.
Some of the safety devices utilize a manual activator. This is the method of initiating the safety lock out. This may be in the form of a plug, disconnect plug, lever or a handle. Within this lockable handle, there may be a location for a padlock. Personnel servicing the equipment should place a padlock in the lockout handle.
WARNING! Always disconnect and lockout all electrical power and pneumatic (i.e. compressed air) sources prior to servicing or cleaning any loader, including all units. Failure to do so may result in serious injury.
At no time must anyone remove the lockout or reconnect the twist plug, other than the person who installed the lockout or who unplugged the twist plug.
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