1. For the purpose of complying with item 36.7.1 of this Standard, this annex covers the following machines exclusively used in the slaughter and processing industry of meat and derivatives intended for human consumption:
I. Automatic machine for skinning and removing skin and membrane;
II. Open machine for skinning and removing skin;
III. Gizzard processing machine;
IV. Band Saw Machine
V. Machine for cutting carcasses of medium and large animals.
I – Automatic machine for skinning and removing skin and membrane
1.1 The automatic machine for skinning and removing skin and membrane from meat intended for human consumption is defined for the purposes of this annex as a machine with traction cylinders and a blade used for skinning and removing the skin and membrane from meat, with conveyor belt feeding, retention system, and discharge conveyor belt, as illustrated in figures 1 and 2.
1.1.1 The machine must be used within the limits established in the instruction manual.
Figure 1 – Automatic machine for skinning and removing skin and membrane
Legend:
1. Discharge conveyor belt (product exit);
2. Mobile guard;
3. Retention cylinders;
4. Blade support;
5. Blade;
6. Toothed or transport cylinder;
7. Feeding conveyor belt;
8. Housing/Drive system.
Source: Technical Standard EN 12355:2003 + A1: 2010
Figure 2 – Detail of the cutting and transport system of an automatic machine for skinning and removing skin and membrane
Legend:
1. Retention cylinder;
2. Feeding conveyor belt;
3. Product;
4. Traction toothed cylinder;
5. Scraper;
6. Blade;
7. Blade support;
8. Discharge conveyor belt (product exit).
Source: Technical Standard EN 12355:2003 + A1: 2010
1.1.2 The mechanical hazards (figure 3) and safety requirements covered in this annex refer to the type of machine described in item 1.1 and its application limits.
1.1.2.1 A preliminary risk assessment of the machine must be conducted after installation, a long period of inactivity, or when there is a change in the operational process, in relation to the worker, to avoid additional risks arising from the process and working conditions.
Figure 3 – Danger zones of the automatic machine for skinning and removing skin and membrane
Legend:
1. Zone 1 – retention and cutting zone;
2. Zone 2 – feeding zone;
3. Zone 3 – discharge zone;
4. Zone 4 – conveyor movement zone;
5. Zone 5 – Drive zone;
6. Zone 6 – caster system for transport;
H – Height of the feeding and discharge conveyor surface in relation to the ground.
Source: Technical Standard EN 12355:2003 + A1: 2010
1.1.3 Access to danger zones 1, 2, and 3 must be prevented by means of interlocked movable protection, monitored by a safety interface, according to items 12.38 to 12.55 of NR-12, and access to zones 2 and 3 must meet the dimensions indicated in table 1 and figures 4 and 5 of this annex.
1.1.3.1 The risk movement of the cylinders must cease completely within two seconds when the interlocked movable protection is opened.
1.1.3.2 The movable protection must be designed so that it can be moved by the worker with a force of less than 50N (newton).
Table 1 – Relationship between opening height B and distance A starting from the contact area (measured in millimeters)
| A | ≥ | 230 | 450 | 550 |
| B | ≤ | 40 | 95 | 120 |
A = Distance to the contact area.
B = Height of the opening, including the control distance, at the front edge of the guard or disconnect bar.
Figure 4 – View of danger zones 1 and 2 for table 1 application
Legend:
1. Product;
2. Scraper rake;
3. Fixed bar.
Source: Technical Standard EN 12355:2003 + A1: 2010
Figure 5 – View of danger zones 1 and 3 for table 1 application
Legend:
1. Product;
2. Scraper rake;
3. Fixed bar.
Source: Technical Standard EN 12355:2003 + A1: 2010
1.1.4 Access to danger zone 4 must be prevented by means of interlocked movable or fixed protection, according to items 12.38 to 12.55 of NR-12, to prevent access to hazardous movements of continuous conveyors, especially at crushing, grabbing, and entrapment points formed by belts, rollers, couplings, and other accessible moving parts of conveyors during normal operation.
1.1.5 Access to danger zone 5 must be prevented on all sides by means of interlocked movable or fixed protection, according to items 12.38 to 12.55 of NR-12.
1.1.6 The safety system and its interconnections must achieve at least safety category 3.
1.1.7 On mobile machines with casters, at least two casters must have locks.
1.1.8 The height “H” must be 1050 mm if the height of the conveyor (work surface) is fixed.
1.1.8.1 When the height of the conveyor is adjustable, the height “H” must allow adjustment between 850 mm and 1120 mm.
1.1.8.2 Height “H” outside the standard established in items 1.1.8 and 1.1.8.1 of this annex can only be adopted through an ergonomic work analysis (EWA) of the workstation.
1.1.9 Electrical components must meet the degree of protection (IP) according to official technical standards in force at the time of publication of this annex.
1.1.9.1 When a water pressure jet is used for machine cleaning, additional measures must be adopted to protect external electrical components.
II – Open machine for skinning and removing skin and membrane
1.2 The open machine for skinning and removing the skin and membrane from meat intended for human consumption is defined for the purposes of this annex as a machine with a rotating toothed or drag cylinder and blade used for skinning and removing the skin and membrane from meat, manually fed without the use of a conveyor, as illustrated in figures 6 and 7.
1.2.1 Only rounded and large products should be processed on open machines for skinning and removing the skin and membrane.
1.2.1.1 Flat products should only be processed on automatic machines for skinning and removing skin and membrane.
1.2.1.2 The machine must be used within the limits established in the instruction manual.
Figure 6 – Open machine for skinning and removing the skin and membrane
Legend:
1. Toothed cylinder and protective cover;
2. Blade;
3. Evacuation table;
4. Blade support;
5. Alignment table;
6. ON/OFF switch;
7. Foot switch;
8. Drive system;
9. Locking device;
10. Table height (H).
Source: Technical Standard EN 12355:2003 + A1: 2010
Figure 7 – System of an open machine for skinning and removing the skin and membrane
Legend:
1. Rounded product;
2. Cut thickness ≤ 5mm (toothed cylinder) or ≤ 0.5 mm (drag cylinder);
3. Feeding table;
4. Toothed or drag cylinder;
5. Blade support;
6. Blade;
7. Hide or skin;
8. Scraper comb.
Source: Technical Standard EN 12355:2003 + A1: 2010
1.2.2 The mechanical hazards (figure 8) and safety requirements covered in this annex refer to the type of machine described in item 1.2 and its application limits.
1.2.2.1 A preliminary risk assessment of the machine must be conducted after installation, a long period of inactivity, or when there is a change in the operational process, in relation to the worker, to avoid additional risks arising from the process and working conditions.
Figure 8 – Danger zones of the open machine for skinning and removing the skin and membrane
Legend:
1. Zone 1: Cutting zone;
2. Zone 2: Discharge zone;
3. Zone 3: Internal zone – between cylinders and fixed parts of the machine and cleaning devices (if any);
4. Zone 4: Drive zone;
5. Zone 5: Caster system for transport;
H. Height of the alignment table in relation to the ground.
Source: Technical Standard EN 12355:2003 + A1: 2010
Figure 9 – Detail of danger zones 1, 2, and 3 of the open machine for skinning and removing the skin and membrane (with scraper comb)
Legend:
1. Rotating toothed cylinder and adjustable blade holder with mounted blade;
2. Rotating toothed cylinder and scraper comb;
3. Rotating toothed cylinder and fixed parts of the machine.
Source: Technical Standard EN 12355:2003 + A1: 2010
Figure 10 – Detail of danger zones 1, 2, and 3 of the open machine for skinning and removing the skin and membrane (with rotating scraper cylinder).
Legend:
- Rotating drag cylinder and fixed blade holder with mounted blade;
- Rotating drag cylinder and rotating scraper cylinder;
- Rotating drag/scraper cylinders, with fixed parts of the machine and air jet cleaning device. Source: Technical Standard EN 12355:2003 + A1: 2010
1.2.3 Access to danger zone 1 (cutting area and separation area between the toothed or drag cylinder and the blade holder) must be protected by applying the following measures:
1.2.3.1 The adjustable distance between the rotating toothed or drag cylinder and the edge of the blade must be ≤ 5.0 mm and ≤ 0.5 mm, respectively.
1.2.3.2 The blade and blade holder must be designed so that the blade can only be mounted in one position.
1.2.3.2.1 When a double blade device is used above the blade holder, the double blade assembly must not form a contact area with the toothed cylinder, which occurs when the difference between the blade edges is ˃ 2 mm (see figure 11).
Figure 11 – Detail of the double blade device
Legend:
1 – Double blade;
2 – Blade holder.
Source: Technical Standard EN 12355:2003 + A1: 2010.
1.2.3.3 In the case of using a toothed cylinder, the angle formed by the free part of the toothed cylinder, between the blade and the front edge of the table, must not be greater than 35º of the cylinder circumference, for a table height between 850 mm to 1050 mm.
1.2.3.3.1 In the case of rounded and exceptionally large products, a feeding table that allows a free part of the toothed cylinder not exceeding 90º for a table height ˃ 850 mm can be used.
1.2.3.4 In the case of using a drag cylinder, the point-to-point distance of the longitudinal grooves on the rotating drag cylinder circumference must be less than or equal to 2.5 mm, the groove depth less than or equal to 2.0 mm, and the grooves must not have circumferential ridges (see figure 12).
Figure 12 – Safety requirements of the drag cylinder
Legend:
1 – Drag cylinder without circumferential ridges.
2 – Drag cylinder with circumferential ridges.
Source: Technical Standard EN 12355:2003 + A1: 2010
1.2.3.5 The drive and stop device of the toothed or drag cylinder drive system must be a sensitive control.
1.2.3.5.1 The cylinder must stop within two seconds after the operator releases the control switch.
1.2.3.5.2 The control switch can be operated, for example, with the foot, knee, or belly, and must be protected against unintentional operation.
1.2.3.5.3 The drive and stop device can be interconnected in series with the emergency stop button.
1.2.3.6 Measures must be adopted to prevent third-party access to danger zone 1, limiting access only to the machine operator’s workstation (front access).
1.2.3.6.1 When it is not possible to limit access by positioning the machine in the environment or organizing workstations, third-party (other people) access to the toothed or drag cylinder of the open machine for skinning and removing the skin and membrane must be protected by fixed protection, according to items 12.38 to 12.55 of NR-12.
1.2.3.6.2 Metal mesh gloves or gloves reinforced with metal wire must not be used during machine operation.
1.2.4 Access to danger zones 2, 3, and 4 must be prevented on all sides by means of interlocked movable or fixed protection, according to items 12.38 to 12.55 of NR-12.
1.2.5 The safety system and its interconnections must achieve at least safety category 3.
1.2.6 The height “H” must be 1050 mm if the height of the alignment table (work surface) is fixed.
1.2.6.1 When the height is adjustable, the height “H” must allow adjustment between 850 mm and 1120 mm.
1.2.6.2 Height “H” outside the standard established in items 1.2.6 and 1.2.6.1 of this annex can only be adopted through an ergonomic work analysis (EWA) of the workstation.
1.2.7 On mobile machines with casters, at least two casters must have locks.
1.2.8 Electrical components must meet the degree of protection (IP) according to official technical standards in force at the time of publication of this annex.
1.2.8.1 When a water pressure jet is used for machine cleaning, additional measures must be adopted to protect external electrical components.
1.2.9 The machine must be equipped with an emergency stop device so that its arrangement allows the emergency stop to be activated within the operator’s reach.
1.2.9.1 The emergency stop device must comply with NR-12.
III – Gizzard processing machine
1.3 The gizzard processing machine is defined for the purposes of this Annex as a machine with a conveyor and/or feeding area, toothed cylinders, discharge area, and discharge residue funnel used for further cleaning gizzards.
1.3.1 If the gizzard cleaning machine is adapted to also perform further gizzard cleaning, the machine and its adaptations must meet the safety requirements provided in this annex.
1.3.2 The mechanical hazards and safety requirements covered in this annex refer to the type of machine described in item 1.3 and its application limits.
1.3.2.1 A preliminary risk assessment of the machine must be conducted after installation, a long period of inactivity, or when there is a change in the operational process, in relation to the worker, to avoid additional risks arising from the process and working conditions.
1.3.2.2 Access to the danger zone of cylinder operation must be prevented by means of interlocked movable protection, monitored by a safety interface, or fixed, according to items 12.38 to 12.55 of NR-12.
1.3.2.2.1 The risk movement of the cylinders must cease completely within two seconds when the interlocked movable protection is opened.
1.3.2.2.2 The movable protection must be designed so that it can be moved by the worker with a force of less than 50N (newton).
1.3.2.3 Access to the danger zones of the feeding area, product discharge area, and discharge residue funnel must be prevented by means of protection that, by its geometry, prevents access to hazardous movements through interlocked movable or fixed protection, according to items 12.38 to 12.55 of NR-12, especially at crushing, grabbing, and entrapment points formed by rollers, couplings, and other accessible moving parts during normal operation.
1.3.2.3.1 Protections against access to the danger zones of the feeding area, product discharge area, and discharge residue funnel must also observe the safety distances according to Table I of item “A” of Annex I of NR-12.
1.3.2.3.2 If a conveyor is used for automatic feeding of the machine or product exit, interlocked movable or fixed protection must be used, according to items 12.38 to 12.55 of NR-12, which prevents access to hazardous movements of continuous conveyors, especially at crushing, grabbing, and entrapment points formed by conveyors, belts, rollers, couplings, and other accessible moving parts during normal operation.
1.3.2.4 Access to moving parts and power transmissions must be prevented on all sides by means of interlocked movable or fixed protection, according to items 12.38 to 12.55 of NR-12.
1.3.3 The safety system and its interconnections must achieve at least safety category 3.
1.3.4 The height “H” must be 1050 mm if the feeding height of the machine (work surface) is fixed.
1.3.4.1 When the feeding height is adjustable, the height “H” must allow adjustment between 850 mm and 1120 mm.
1.3.4.2 Height “H” outside the standard established in items 1.3.4 and 1.3.4.1 of this annex can only be adopted through an ergonomic work analysis (EWA) of the workstation.
1.3.5 On mobile machines with casters, at least two casters must have locks.
1.3.6 Electrical components must meet the degree of protection (IP) according to official technical standards in force at the time of publication of this annex.
1.3.6.1 When a water pressure jet is used for machine cleaning, additional measures must be adopted to protect external electrical components.
1.3.7 The machine must be equipped with an emergency stop device so that its arrangement allows the emergency stop to be activated within the operator’s reach.
1.3.7.1 The emergency stop device must comply with NR-12.
Transitional provisions
1.3.8 Machines used for further gizzard cleaning manufactured before the effective date of this Ordinance have the period indicated in Art. 2 to comply with the provisions of item 1.3 and its sub-items, and can be used during this period provided they meet the requirements indicated in sub-items 1.3.8.1 to 1.3.8.6.
1.3.8.1 The gizzard cleaning machine operation can only be performed by workers who do not use gloves and long-sleeved coats.
1.3.8.2 The machine must be equipped with an emergency stop device so that its arrangement allows the emergency stop to be activated within the operator’s reach.
1.3.8.2.1 The emergency stop device must comply with NR-12.
1.3.8.2.2 The movement of the cylinders must cease completely within two seconds after the emergency stop device is activated.
1.3.8.3 The angle of the cylinder grooves must be 60° and the free distance between two cylinders must not exceed 0.4 mm.
1.3.8.4 The roller ends must be equipped with protection to prevent upper limb access to grabbing and crushing zones.
1.3.8.5 Access to cylinder cleaning must be prevented by means of interlocked movable protection, monitored by a safety interface, according to items 12.38 to 12.55 of NR-12.
1.3.8.6 The safety system and its interconnections must achieve at least safety category 3.
IV. Band Saw Machine
1.4 The band saw machine is defined for the purposes of this annex as a machine consisting of a fixed feeding table or a partially sliding feeding table or a conveyor with rollers or a conveyor belt, with an adjustable sliding groove, an upper pulley and a lower pulley, a cutting band, an upper and a lower guide for the cutting band, a device for adjusting the tension of the cutting band, a drive system, and electrical components, depending on the machine’s specificity, with a cutting height of up to 550 mm.
1.4.1 The machines to which this standard applies are used to cut:
a) bones;
b) meat with or without bones;
c) fish;
d) blocks of food products;
e) other meat products.
1.4.2 This standard does not apply to band saws restricted to butcher shops, grocery stores, bars, and restaurants, as provided in Annex VII of NR-12.
1.4.3 The mechanical hazards and safety requirements covered in this annex refer to the type of machine described in item 1.4, and a preliminary risk assessment of the machine must be conducted after installation, a long period of inactivity, or when there is a change in the operational process, in relation to the worker, to avoid additional risks arising from the process and working conditions.
1.4.4 Danger zones are considered, as shown in figure 1:
Legend:
1- Zone 1- Part of the cutting band covered by an adjustable sliding groove
2 – Zone 2- Cutting area
3 – Zone 3 – Lower and upper pulleys
4 – Zone 4 – Cutting band outside the cutting area
5 – Zone 5 – Feeding table (fixed and/or partially sliding)
6 – Zone 6 – Drive unit
7 – Zone 7- Caster system for transport.
H – Height of the work table in relation to the ground
Figure 1 – Danger zones of the band saw machine
Source: Technical Standard EN 12268:2014
1.4.5 Access to danger zone 1 must have an adjustable sliding groove to enclose the perimeter of the serrated band in the cutting region, releasing only the minimum area of serrated band for operation.
1.4.6 Access to danger zone 2, the cutting area of the blade, must be prevented by applying the following combined measures:
a) limit the operator(s) hands’ distance to at least 20 cm from the band, on all sides;
b) do not use metal mesh gloves, cut-resistant gloves, or gloves made of material that can grab;
c) when wearing long-sleeved clothing during the activity, it must be fastened at the wrist;
d) adopt measures to prevent third-party access to danger zone 2, limiting access only to the machine operator(s) workstation.
1.4.6.1 Cuts that require a distance less than the one provided in item “a” of item 1.4.6, can only be performed with a device that completely protects the operator(s) hands.
1.4.6.1.1 The protective device, made of material resistant to the saw’s cut, can be a pusher type, physical barrier, or other alternatives, as shown in figures 2, 3, and 4, which prevent hand contact with the cutting band.
1.4.6.1.2 Alternative protection solutions must be designed to achieve the necessary safety level provided in this annex.
1.4.6.2 When it is not possible to limit access by positioning the machine in the environment or organizing workstations, third-party (other people) access to the cutting area of the blade must be protected by means of fixed or interlocked movable protection, according to items 12.38 to 12.55 of NR-12.
Figure 2 – Example of a device for protecting the worker’s hand
Source: File of the subcommittee on machines of the CNTT of NR-36
Figure 3 – Example of a device for protecting the worker’s hand
Source: Reducing bandsaw accidents in the food industry. Guidance Note PM33 from HSE (Health and Safety Executive), 2000.
Figure 4 – Example of a device for protecting the worker’s hand
Source: Reducing bandsaw accidents in the food industry. Guidance Note PM33 from HSE (Health and Safety Executive), 2000.
1.4.7 Access to danger zone 3, lower and upper pulleys, and danger zone 4, cutting band outside the cutting area, must be prevented on all sides by means of interlocked movable protection, according to items 12.38 to 12.55 of NR-12.
1.4.8 In danger zone 5, feeding table, when using the partially sliding table, it must be designed to prevent any jump or slip off the rails or guide.
1.4.9 Access to danger zone 6, drive unit, must be prevented by means of interlocked movable or fixed protection, according to items 12.38 to 12.55 of NR-12, to prevent access to hazardous movements of the drive system during normal operation.
1.4.10 The band saw machine with a cutting height greater than 420 mm must be equipped with a non-automatic feeding and evacuation unit, such as a conveyor with rollers, a conveyor belt, a sliding table, among others.
1.4.11 Measures must be adopted to prevent people and materials from passing immediately behind the operator(s) to avoid accidental displacement during operation.
1.4.12 On mobile machines with casters, at least two casters must have locks.
1.4.13 The height “H”, from the ground to the upper surface of the feeding table must be between 850 mm to 1120 mm.
1.4.13.1 Height “H” outside the standard established in item 1.4.10 of this annex can only be adopted through an ergonomic work analysis (EWA) of the workstation.
1.4.14 Electrical components must meet the degree of protection (IP) according to official technical standards in force at the time of publication of this annex.
1.4.14.1 When a water pressure jet is used for machine cleaning, additional measures must be adopted to protect external electrical components.
1.4.15 The machine must be equipped with an emergency stop device so that its arrangement allows the emergency stop to be activated within the operator’s reach.
1.4.15.1 The emergency stop device must comply with NR-12.
1.4.16 The safety system and its interconnections must achieve at least safety category 3.
1.4.17 Band saw machine operators must be identified during their work shift.
V. Machine for cutting carcasses of medium and large animals.
1.5 The machine for cutting carcasses of medium and large animals is defined for the purposes of this annex as a machine with rotating discs used for segregating carcasses such as ham, loin, shoulder, or others and equipped with an automatic conveyor belt, as illustrated in Figure 1 (the figure is merely illustrative, for demonstration purposes of the machine parts).
1.5.1 The machine must be used within the limits established in the manufacturer’s instruction manual.
Figure 1 – Module of the machine for cutting carcasses of medium and large animals
Legend:
1 – Fixed or movable protection of the cutting area;
2 – Feeding conveyor belt (product entry);
3 – Discharge conveyor belt (product exit);
4 – Fixed or movable protection of the drive system;
5 – Cutting disc;
6 – Fixed protection of the drive shaft.
1.5.2 The mechanical hazards (Figure 2) and safety requirements covered in this annex refer to the type of machine described in item 1.5 and its application limits.
1.5.3 A preliminary risk assessment of the machine must be conducted after installation, a long period of inactivity, or when there is a change in the operational process, in relation to the worker, to avoid additional risks arising from the process and working conditions.
Figure 2 – Danger zones of the machine for cutting carcasses of medium and large animals
Legend:
1 – Cutting zone – feeding;
2 – Cutting zone – discharge;
3 – Cutting disc movement zone;
4 – Drive zone;
5 – Transmission zone;
6 – Conveyor movement zone;
H – Height of the feeding and discharge conveyor surface in relation to the ground.
1.5.4 Access to danger zone 1 (feeding), danger zone 2 (discharge), and danger zone 3 (cutting disc movement) must be prevented by means of fixed or interlocked movable protection monitored by a safety interface, according to items 12.38 to 12.55 of NR-12.
1.5.4.1 The following safety distances specified in Table 1 and Figure 3 must be observed, or the following combined protective measures must be adopted:
a) install obstruction devices, made of rigid material, to prevent inadvertent access to danger zone 1 (feeding), danger zone 2 (discharge), and danger zone 3 (cutting disc movement), with the following specifications:
I. two parallel front swinging obstruction devices at the cutting entry face (danger zone 1), which offer resistance to prevent accidental contact with the disc, with a mass of at least 2 kg each;
II. fixed obstruction device at the cutting exit face (danger zone 2), covering the disc;
III. fixed protection in the cutting disc movement zone (danger zone 3), covering the disc;
b) meet the height and distance specifications in Figure 3 and Table 1:
Figure 3 – Obstruction devices and internal and external protections
Legend:
1 – Two front swinging obstruction devices at the cutting entry face. These devices must be positioned parallel, one on each side of the cutting disc. The gap between the swinging devices must be no more than 12 mm;
2 – The obstruction device at the cutting exit face must have a thickness equal to or greater than the cutting disc’s thickness;
3 – Fixed protection in the cutting disc movement zone;
4 – Fixed or movable external protection of the cutting area;
A – Opening height at the product entry and exit;
B – Distance measured from the intersection point of the disc with the table, in the feeding zone (point X), to the workstation near the surface that restricts body access;
C – Distance measured from the intersection point of the disc with the table, in the discharge zone (point Y), to the workstation near the surface that restricts body access;
D – Maximum gap between the disc and the rear obstruction device;
E – Minimum overlap between the front swinging obstruction devices (1) and the cutting disc;
F – Minimum distance between the cutting disc and the center of gravity of the front swinging obstruction devices (1) to ensure these devices always cover the disc;
X – Intersection point of the disc with the table, in the feeding zone;
Y – Intersection point of the disc with the table, in the discharge zone;
CG – Center of gravity of the front swinging obstruction devices (1).
Table 1 – Height and distance measurements (measured in millimeters)
| A | ≤ | 320 |
| B | ≥ | 850 |
| C | ≥ | 550 |
| D | ≤ | 5 |
| E | ≥ | 10 |
| F | ≥ | 65 |
1.5.4.1.1 Other obstruction devices may be adopted, observing item 12.5 and subitem 12.38.1 of NR-12, provided they guarantee the same effectiveness as those mentioned in this item and comply with the provisions of official technical standards of types A and B, and in the absence of these, applicable international or harmonized European standards.
1.5.4.2 The cutting disc movement must cease completely before the interlocked movable protection is opened.
1.5.4.3 If the fixed or movable external protection of the cutting area is opened on its upper face, the safety distances specified in Table II, item A, of Annex I, NR-12 must be observed.
1.5.5 Access to danger zone 4 (drive) and danger zone 5 (transmission) must be prevented on all sides by means of fixed or interlocked movable protection monitored by a safety interface, according to items 12.38 to 12.55 of NR-12.
1.5.6 Access to danger zone 6 (conveyor movement) must be prevented by means of fixed or interlocked movable protection, monitored by a safety interface, according to items 12.38 to 12.55 of NR-12, to prevent access to hazardous movements of continuous conveyors, especially at crushing, grabbing, and entrapment points formed by belts, rollers, couplings, conveyor drive shafts, and other accessible moving parts of conveyors during normal operation.
1.5.7 Interlocked movable protections must be designed so that they can be moved by the worker with a force of less than 50 N (newtons).
1.5.8 The safety system and its interconnections must achieve at least safety category 3.
1.5.9 When workers intervene in the activity, the height “H,” indicated in Figure 2, must be 1000 mm, if the conveyor height (work surface) is fixed.
1.5.9.1 When the conveyor height is adjustable, the height “H” must allow adjustment between 850 mm and 1120 mm.
1.5.9.2 Height “H” outside the standard established in items 1.5.9 and 1.5.9.1 of this annex can only be adopted through an ergonomic work analysis (EWA) of the workstation.
1.5.10 Electrical components must meet the degree of protection (IP) according to official technical standards in force at the time of publication of this annex.
1.5.10.1 When a water pressure jet is used for machine cleaning, additional measures must be adopted to protect external electrical components.
1.5.11 The machine must be equipped with one or more emergency stop devices that allow the operation to be interrupted from any of the operators at their workstations.
1.5.11.1 The emergency stop device must comply with NR-12.