BS EN ISO 20430 pdf free download

BS EN ISO 20430 pdf free download. Plastics and rubber machines – Injection moulding machines一Safety requirements.
4 Safety requirements and/or protective/risk reduction measures 4.1 Basic requirements 4.1.1 General Machinery shall comply with the safety requirements and/or protective/risk reduction measures of this clause. In addition, the machine shall be designed in accordance with the principles of ISO 12100:2010 for relevant but not significant hazards, which are not dealt with by this document. Protective systems and safety-related parts of the control systems shall be in accordance with: 一Protective Type I, II and III as specified in Annexes B, C and D. These annexes describe minimum requirements and the calculation of the PL of the whole system achieved is not required; or 一the PL. in accordance with ISO 13849-1:2015, as specified in the relevant subclauses. NOTE The safety level achieved when applying the PL，as specified in the relevant subclauses is at least equivalent to the safety level achieved when applying the annexes. 4.1.2 Start, stop and restart functions 4.1.2.1 Start function The start of an operation shall be possible only when all safeguards are in place and functioning (see IEC 60204-1:2016, 9.2.3.2). The machine shall only be started by actuation of the start device provided for that purpose or closing a control guard in accordance with 4.2.4. 4.1.2.2 Stop function 4.1.2.2.1 Normal stop The machine shall be equipped with a control device activating a stop function in accordance with stop category 0 or 1 as described in IEC 60204-1:2016, 9.2.2, that brings the machine to a complete stop. 4.1.2.2.2 Operational stop For operational reasons, e.g. to permit an easier and more rapid restart of the machinery, it could be necessary to provide a stop control that does not cut off the energy supply to the actuators. In this case, in addition to the above normal stop function, a stop category 2 may be used for the movements in the areas which are enclosed by safeguards which are in place and functioning. When a safeguard is activated, stop category 0 or 1 shall become effective as specified in the relevant subclauses. 4.1.2.3 Interruption or failure of the power supply An interruption or a failure of the power supply shall not result in a loss of safety function and restoration of the energy supply shall not result in the automatic restarting of the machine (see ISO 12100:2010, 6.2.11.4 and 6.2.11.5). 4.1.3 Emergency stop The emergency stop shall function as a category 0 or 1 stop as described in IEC 60204-1:2016, 9.2.2 ensuring the fastest stopping. Emergency stop devices shall be in accordance with ISO 13850:2015 and IEC 60204-1:2016, 10.7. An emergency stop device shall, at a minimum, be located at each operator station. Actuation of an emergency stop device shall stop any dangerous movement and shall discharge the hydraulic accumulators. Closing of an interlocking guard shall not automatically initiate further movement and a new start command shall be required, unless a control guard in accordance with 4.2.4 is used. Interlocking devices associated with guards shall fulfil the requirements of ISO 14119:2013, especially regarding the selection, arrangement and mounting. Reasonably foreseeable manipulation shall be prevented. Type 3 interlocking devices according to ISO 14119:2013 shall only be used if in the specific application they cannot be defeated. When a Type 3 or Type 4 interlocking device according to ISO 14119:2013 is used, it shall have two independent electrical contacts, and both shall be independently connected to the control and monitoring system. NOTE The connection between the control and monitoring systems to the shut-off device[s) depends on the safety level required.BS EN ISO 20430 pdf download.