AS 4024.3405:2018 pdf free

AS 4024.3405:2018 pdf free.Safety of machinery
Hazards can arise if components in safety related parts of control systems fail or if the system does not meet its safety requirement specifications. Failures may occur due to mechanical damage, contact failure, electronic component failure. Hazards may also arise if safety systems are deliberately defeated by operators.
Systematic faults may occur, especially in programmable systems as a result either of errors in the safety requirement specifications or of failure to meet the specifications. Failures can lead to loss of safety functions resulting in unexpected start-up of moving parts, incorrect sequencing of machine operations or prevent moving parts from stopping as expected.
On electronic drive systems where the power supply to a drive motor is not disconnected while the guards are open, there is a risk of unexpected start-up with consequential mechanical hazards if the control system malfunctions or responds to an external disturbance such as electromagnetic interference.
On machines that are intended to pack agri-foodstuffs, pharmaceuticals or other products where hygiene is a consideration, product contamination hazards can result if inappropriate contact materials or construction methods are used or if lubricants or other contaminating substances are allowed to come into contact with the product.
Wrapping machines may incorporate mechanical, electrical, pneumatic or hydraulic drive mechanisms which present a variety of different hazards including crushing, shearing, cutting, entanglement, friction, drawing-in,electric shock and burning. Some of these hazards may persist after the power supply has been cut off due to stored energy.
Sometimes there is a distributing guide or draw-back belt for discharging the in-running products to prevent a product jam in the preceding machine. This discharging device is often activated by opening a guard.
With such feed systems the products are usually fed into the in-feed chain by an automatic feeding device or a conveyor. Alternatively the feed system may consist of flat belt conveyors which are fed automatically or manually. Both types of product feed may present drawing-in, crushing, shearing or friction hazards.AS 4024.3405 pdf free download.