BS/EN 12042-2014 pdf download.Food processing machinery – Automatic dough dividers Safety and hygiene requirements.
Guards shall comply with EN 953:1997+A1:2009. Where reference is made to interlocking devices throughout
Clause 5, they can be interlocked without guard locking and shall comply with EN 1088:1995+A2:2008.
Clause 5 and Clause 6.
Where the interlocking mechanism has movable parts, e.g. position switches, these shall be protected from contamination by dough or dry ingredients, e.g. by mounting them within the machine body.
The safety related parts of the control systems shall present at least a performance level d defined in accordance with EN ISO 13849-1:2008.
5.2.2 Zone 1: Access to the dividing zone or feeding assistance device zone If any, via the hopper
5.2.2.1 General
The safeguarding objective is to prevent contact by the operator (or other person) reaching down the hopper and coming into contact and being injured in the danger zone which is the cutting)crushing zone of the dividing device.
When a working platform is provided by the manufacturer according to 5.9. it shall comply with
EN ISO 14 122-2 and the working platform, or the access to it, shall be interlocked to stop the machine if the
vertical distance between the flooring of the platform and the edge of the hopper is less than or equal to
1100 mm. In that case, the interlocking may be realized, e.g. by:
— use of a pressure sensitive mat or floor according to EN ISO 13856-1, or
— use of an AOPD to prevent access to the working platform, or
— use of an interlocked guard.
5.2.2.2 Feeding — Safeguarding at the hopper
5.2.2.2.1 General
Access via the hopper opening to the danger zone shall be prevented while the machine is in operation. The access to the danger zones in the feed intake hopper may be restricted or prevented by example with one of the following:
— a pressure sensitive edge (see 5.2.2.2.2 and Figure 4);
an AOPD (see 5.2.2.2.3);
a swan neck hopper (see 5.2.2.2.4 and Figure 5);
If there are no mechanical hazards (e.g. if the feed consists of a spindle with rubber spokes or notches, or if the flour is sprinkled by a vibating device) due to the flour feed system and if a guard is necessary to prevent dust emission (see 5.7), this guard shall automatically be closed (e.g. by gravity, etc.). In this case, an interlocked guard is not necessary.
5.2.7 Loss of stability
5.2.7.1 Machines shall be designed to be stable and shall comply with 5.2.7.2 and 5.2.7.3 as applicable. For machines designed to be fixed to the floor, the instruction handbook shall Indicate the values of torques at the fixing points.
5.2.7.2 Free standing machines without castors shall be stable when tilted 10° from the horizontal plane. in the most unfavourable direction,
5.2.7.3 Free standing machines with castors shall have a locking device for example a brake on at least two castors (or sets of castors) and shall comply with the provisions of 5.2.7.2.
5.3 Electrical hazards
5.3.1 General
Electrical equipment, for example switches, that may be exposed to water, e.g. during cleaning, shall be protected to an appropriate lP rating according to EN 60529 and EN 60204-1:2006.
The electrical equipment shall comply with EN 60204-1:2006, with the precisions given in the following subclauses.
5.3.2 Safety requirements related to electromagnetic phenomena
The machines shall have sufficient immunity to electromagnetic disturbances to enable them to operate safely as intended and not fail to danger when exposed to the levels and types of disturbances for the intended use of the machine (see EN 61000-6-1).
The manufacturer of the machines shall design, install and wire the equipment and sub-assemblies taking into account the recommendations of the suppliers of these sub-assemblies.
5.3.3 ProtectIon against electric shock
The electrical equipment shall comply with EN 60204-1:2006, Clause 6.
5.3.4 Power circuits.BS/EN 12042-2014 pdf download.