BS EN 1612 pdf free download

BS EN 1612-2019 pdf free download.Plastics and rubber machines – Reaction moulding machines and plants – Safety requirements.
4 Safety requirements and/or protective/risk reduction measures
4.1 General Machinery shall comply with the safety requirements and/or protective/risk reduction measures of this clause. In addition, the machine shall be designed according to the principles of EN ISO 12100:2010 for relevant but not significant hazards, which are not dealt with by this document.
4.2 Start function The start of an operation shall be possible only when all safeguards are in place and functional (see EN 60204‑1:2006, 9.2.5.2). The machine shall only be started by actuation of the start device provided for that purpose.
4.3 Stop function
A normal stop command shall be provided to bring the machine to a stop. The normal stop command shall function as a category 0 or 1 in accordance with EN 60204‑1:2006, 9.2.2 and required Performance level (PL r ) = c EN ISO 13849-1:2015.
An additional operational stop that does not cut off the energy supply to the actuators may be installed according to category 2 in accordance with EN 60204‑1:2006, 9.2.2 and PL r = b EN ISO 13849-1:2015 for the movements which are enclosed by safeguards.
4.4 Restart function
An interruption or a failure of the power supply shall not result in a loss of safety function and restorationof the energy supply shall not result in the automatic restarting of the machine (see EN ISO 12100:2010,
6.2.11.4 and 6.2.11.5).
4.5 Safety related parts of the control system
The safety related parts of the control system shall be in accordance with EN ISO 13849‑1:2015. PL r for the relevant safety functions are given in the corresponding subclauses.
4.6 Crushing/impact? hazards? due? to? moving? parts? and/or? units
4.6.1 Drive and power transmission
The access to moving parts of the drive and power transmission shall be prevented by enclosing guards according to EN ISO 14120:2015. The openings in the guards shall comply with EN ISO 13857:2008, Table 4.
4.6.2 Moulding, product shaping and transport equipment
The access to all the moving parts during production shall be prevented by distance guards in accordance with EN ISO 13857:2008, Table 2 and Table 4 and EN ISO 14120:2015, in combination with one or more of the following safeguards, in order to stop all dangerous movements if actuated:
— interlocking guards with or without guard locking in accordance with EN ISO 14119:2013; for interlocked guards where full body access is possible, it shall be possible to open them from the inside without the use of ancillary means;
— trip devices:
— electro-sensitive protective equipment in accordance with EN 61496-1:2013, type 2;
— pressure-sensitive protective mats in accordance with EN ISO 13856-1:2013;
— laser scanner in accordance with EN 61496‑1:2013.
Interlocking guards without guard locking and trip devices shall be positioned in accordance with
EN ISO 13855:2010.
If full body access is possible a reset device according to EN ISO 13849‑1:2015, 5.2.2 shall be installed to prevent the unexpected restart when somebody is inside the protected area.
The PL r of the safety related parts of the control system in accordance with EN ISO 13849‑1:2015 for the stopping of dangerous moving parts of the machine shall be as follows:
— handling unit (e.g. for parts or mixing head or moulds) ≤ 3 axes: PL r = c;
— handling unit (e.g. for parts or mixing head or moulds) > 3 axes: PL r = d;BS EN 1612 pdf download.