Safety circuits used in machine guarding applications incorporate devices such as sensors and relays to de-energize equipment if any hazardous condition is detected. These conditions normally involve a machine guard not being closed, a presence sensor detecting personnel in an unsafe area or the triggering of an emergency stop function.
Just five weeks after a 28-year-old maintenance worker lost part of his right arm in an improperly guarded bread wrapping machine at the Cincinnati-based Klosterman Baking Co., federal safety inspectors investigating the injury found another worker exposed to the same hazard.
