BS EN 859:2009 pdf free download – Safety of woodworking machines- Hand fed surface planing machines.
5.2.4 Normal stopping
The machine shall be fitted with a stop control system, where by the machine and — if fitted — a demountable power feed unit can be brought safely to a complete stop. The stopping action shall include disconnection from energy supply of all machine actuators and actuate the brake (if fitted see 5.3.4).
The normal stop control system shall be in accordance with the requirements in 9.2.2 of EN 60204-1:2006 shall be of:
a) category 1 where the machine is fitted with an electric brake, or
b) category 0 where the machine is fitted with a mechanical brake or the brake is not fitted. For a category I normal stop control system, the stopping sequence shall be:
1) cut at the same time power to a socket for connection of a demountable power feed unit and to the cutterblock motor and to the table adjustment if under preset electronic control, and apply the brake;
2) cut power to the brake after the tool has come to rest e.g. by a time delay of fail safe technique e.g. of capacity type or conforming to the requirements of category 3 according to EN ISO 13849-1:2006.
The design of the control circuits shall be such as to satisfy the normal stopping sequence requirements. If a time delay device is used the time delay shall be at least equal to the braking time. The time delay shall be fixed or the time delay adjustment device shall be sealed.
The category of the control circuits (also see 5.2.1) for normal stopping shall be in accordance with the requirements of EN ISO 13849-1:2006 and at least:
i) category 1 if the control circuits are hardwired;
ii) category 3 if the control circuits include electronic components.
For machines designed to be used with de-mountable power feed unit or if a socket for a demountable power feed unit is fitted a separate category 1 stop control device in accordance with the requirements in 9.2.2 of EN 60204-1:2006 shall be provided for the de-mountable power feed unit only.
Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine and relevant functional testing of the machine.
5.2.5 Emergency stop
Machines designed to be used with a demountable power feed unit or fitted with a socket for a demountable power feed unit or with preset electronic control for adjusting the height of the table(s) shall be fitted with an emergency stop control device which conforms to the requirements of 9.2.5.4.2 and 10.7 of EN 60204-1:2006. The emergency stop control device shall be at any time of self latching type.
In addition the following requirements shall be met:
If the machine is fitted with a mechanical brake the emergency stop function shall conform to category 0 in accordance with the requirements in 4.1.4 of EN ISO 13850:2006 and the emergency stop control circuit shall conform to category 0 in accordance with the requirements in 9.2.2 of EN 60204-1:2006 and shall fulfil the requirements of 9.2.5.4.2 of EN 60204-1:2006.
If the machine is fitted with an electrical brake the emergency stop function shall conform to category 1 in accordance with the requirements in 4.1.4 of EN ISO 13850:2006 and the emergency stop control circuit shall conform to category 1 in accordance with the requirements in 9.2.2 of EN 60204-1:2006 and shall fulfil the requirements of 9.2.5.4.2 of EN 60204-1:2006.