control panel 209 and at plural places inside and outside of the safety fence 207. In the event of a dangerous state of the industrial machinery 203, any one of the emergency stop switches 211 inside and outside of the safety fence 207 may properly be manipulated to cut off power to a main circuit of the controller 201, thereby driving the whole controller 201 into emergency stop.
From the standpoint of safety, as well, a safety switch 215 is also provided at the doorway 205 of the safety fence 207 so as to deactivate the industrial machinery 203 when a door 213 in the doorway 205 is not fully closed.
The safety switch 215 is electrically connected with the industrial machinery 203 installed at place inside of the safetyA probe into how 74 rail cars were allowed to roll uncontrolled for five kilometres onto a busy track just north of Toronto has resulted in investigators calling for Transport Canada to overhaul training requirements for some railway employees.

The Transportation Safety Board (TSB) initiated its review after a June 17, 2017, incident at CN Rail's MacMillan Yard in Vaughan, Ont.

It found gaps in the training process partially contributed to workers losing control of the 1,372-metre, 8,163 tonne train, which rolled at speeds of nearly 50 km/h until its momentum was halted by an upward slope. One tanker car was carrying a mixture of ethanol and gasoline.

"Ever since the disaster at Lac Megantic in 2013, Canadians need no reminders of the dangers posed by uncontrolled or runaway trains," said