S-2.1, r. 14 - Regulation respecting occupational health and safety in mines

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211.1. The remote control must stop or put in neutral the remote controlled equipment when at least one of the following malfunctions occurs on the remote control:
(1)  loss of the nominal voltage recommended by the manufacturer;
(2)  discrepancy between the status of the output relay and the input signal at the receiver;
(3)  reception of 2 conflicting signals, in particular as regards the forward/reverse command;
(4)  reception of parasitic or altered signals; and
(5)  loss of transmitter signal for the period of time recommended by the manufacturer.
O.C. 221-2009, s. 13.