1. Introduction Fig.1 MAX. ( Process ) MIN. ( Ambient ) The Rotative Level Control RL-A AD1/2* are used to detect the level of materials such as dust or granules in containers. They are supplied with plastic housing with a cable gland for assembly cabling whilst. The fixing part is plastic. This device must be mounted on the external wall of the container, laterally and from the top (see fig. 1). The measuring vane must not be struck by the material to be detected. In order to avoid this, if the weight on the measuring vane and shaft is high (this is the case of heavy weight material or subject to block movements) place above the measuring vane some protection deflectors. The Rotative Level Control RL-A AD1/2* can be used with kits Rope or Pendulum shaft (see fig.3). 108x90 Pendulum shaft Shaft extensions Rope extension M20x1.5 125 145 240 L = 500 1000 L = 2000 Fig.2 150 All dimension in mm Fig.3 All dimension in mm 2. Mode of operation output signal Switching part motor A low revolution synchronous induction gearing motor drives a rotating measuring vane, which is for example mounted at a container (see fig. 4). Fig.4 output signal + SW2 Switching part SW1 - SENSITIVITY ADJUSMENT motor As soon as the material level, which is to be checked, reaches the measuring vane, it is handicaped in his rotation. The synchronous induction motor is freely suspended within the housing. The caused reaction torque is used to operate a micro switch giving a suitable electrical signal and to stop the motor (see fig.5). When the vane becomes free again due to the drop in material level, a spring draws the motor back into his operating position, the micro switch returns to his inital position and the motor is switched on. The electrical output signal is then switched over (see fig. 4). Adjustment of the sensitivity: The spring is adjustable in 3 positions(see fig.5) It should be changed only if necessary. Spring + SW2 SW1 - Light : for light material; Central : suitable for nearly every material; Strong : for strong cacking material; Factory setting is Central. The spring can be changed via a small plier. SENSITIVITY ADJUSMENT Fig.5 Light Central Strong DOC. FS007EX REV. B DATE: 20.04.2016 pag. 6/ 10
3. Electrical data Power supply Max power dissipation Output type Connection terminal Screwed cable gland Connection diagramm Protection class 24Vdc 24Vac (50-60Hz) 48Vac (50-60Hz) 110Vac (50-60Hz) 220Vac (50-60Hz) 2.5W 4VA Floating microswitch (see connection diagram fig. 6) Connection diagrams 1 x max 1.5mm 2 1 x M20x1.5 See connection diagram (fig. 6), inside cover and datasheet I AC DC Floating microswitch Imax Vmax 2A 250V Pmax 600VA (cosn=1) 2A 300V 60W Power supply 1 1 2 PE DC AC L N Connect the terminal with the earth of the container. Fig.6 Note : All voltages +10% / -15% 4. Mechanical data Housing Process connection Material process-connection Material vane shaft Material measuring vane Tollerance length L Plastic PA6 grey with fiberglas Enclosure IP6X to EN 60529 Bearing 1½ GAS thread or flanges on request Plastic PA6 Stainless steel Plastic PP, black + - 10mm Slide bearing, high-grade Sealing Friction clutch Pickup delay Sensitivity Speed of measuring vane Radial rotary shaft sealing Protection of the gearing of impacts of the measuring vane Approx. 1.3sec Adjustable via reset force of spring or geometry of measuring vane 1 g/min DOC. FS007EX REV. B DATE: 20.04.2016 pag. 7/ 10
5. Operating conditions Container over-pressure Powderdensity Feature of bulk material Maintenance -0.2bar...+0.1bar Min. 100g/l Dustlike, powdery, granulated, granular Not required Temperature inside container. : -20 upto +80 (see fig. 8) Ambient of the housing. : -20 upto +60 (see fig. 8) The following informations show the maximum surface at the warmest part of the Rotative Level Control RL-A AD1/2... which can happen in failure case (according to ATEX definition). Maximun surface Maximum surface Maximum ambient in to ZONA 21 Maximum ambient in to ZONA 20 120 60 80 110 50 70 100 40 60 90 30 50 RotoStar by AECO Inzago-MI-Italy II 1/2D Ex t IIIC T120 Da/Db 0722 DATE OF PRODUCTION Tprocess (): -20 +80 Tamb (): -20 +60 IP6X --- MODEL--- LOT NUMBER Maximum operating 6. Safety items General The Level control should only be mounted, connected and set-up by qualified staff. The qualified staff must have knowledge of protection classes, regulations and provisions for aparatus in hazardous areas. Check whether the classification ( see Marking above and marking on the unit) is suitable for the application. Switch off the mains voltage before opening the housing. Dangerous voltage! Set into operation only with closed lid of the housing. Line-up only with closed device Use a fuse for the mains voltage (max. 4A) and the signal output (max. 4A). A voltage disconnecting switch must be provided near the switch. A FI protective switch is necessary. Compare the mains voltage applied with the specifications given on the label before switching the device on. For terminal connection of the device, the local regulations must be observed. In the case of inexpert handling or handling malpractice, the electric safety of the device cannot be guaranted. Isolating signal output - mains voltage: 3kV Provide protection for relay contacts to protect the device against spikes, if inductive loads are connected. The Control level must not be modified and/or repaired. In case of a fault please contact the manufacturer. DOC. FS007EX REV. B DATE: 20.04.2016 pag. 8/ 10
6. Safety items Ex relevant Safety instructions for electrical installation All field wirings must have insulation suitable for at least 250Vac. The rating must be at least 90(194 F). Before opening the lid take care, that no dust deposits or whirlings are present. Cable glands and blanking elements Installation according to the regulations of the country, where the product is installed. Not used entries have to be closed with blanking elements certified for this purpose. Where applicable the factory provided parts must be used. A strain relief must be provided for the field wiring cables, when the device is installed with the factory provided cable glands. The diameter of the field wiring cable must match to the clamping range of the cable clamp. If other than the factory provided parts are used, following must be ensured: - The parts must have an approval adequate to the approval of the level sensor ( certificate and type of protection) - The approved range must be from the min. ambient of the level sensor to the max. ambient of the level sensor increased by 10k. - The parts must be mounted according to the instructions of the supplier. 7. Mounting The Rotative Level Control RL-A AD1/2* must be mounted with the thread or the flange on the container. Mounting may be vertical, oblique or horizontal. Inside container (Category 1) Outside container (Category 2) RL-A AD1/2... The electrical connections are made in accordance with the connection diagram( see fig. 6). Make sure, that the cable in the screwed cable gland is seated tightly without fail. After mounting, turn the housing in the rigth direction. The screwed cable gland must show downwards (see fig. 7). This makes sure, that the unit works fine and protects, that water enters into the housing through the screwed cable gland. When the Rotative Level Control RL-A AD1/2* is used in the open, we recommend to use the weather-protection-cover. It protects the unit against moinsture, heat, cold and prevents the formation of condensation water in the interior of the housing. Adjusting the unit at site in not required. Cut one side of the measuring vane: - In case of empty or demand detector at any rate; - To lead the vane through the mounting hole; Fig.7 Right mounting: Screwed cable gland shows downwards 8. Zone classification and Marking The Rotative Level Control RL-A AD1/2* can be used in hazardous areas according to the classification II 1/2D: group II, category 1/2D (zone 20/21), apparatus for dust atmosphere. This device are specially markerd on the type plate (see fig. 9). The approval according to 2014/34/EU directive determines the following classification: Device category to 94/9/EC Usable in zone 1D 20, 21, 22 2D 21, 22 3D * 22 (*) In case of conductive dust additional demands for installation are possible. Equipment Protection Level (EPL) Da Db Dc Fig.8 Fig.9 RotoStar (Category 2) (Category 1) by AECO Inzago-MI-Italy II 1/2D Ex t IIIC T120 Da/Db 0722 DATE OF PRODUCTION Tprocess (): -20 +80 Tamb (): -20 +60 --- MODEL--- LOT NUMBER Outside container Inside container IP6X DOC. FS007EX REV. B DATE: 20.04.2016 pag. 9/ 10
8. Approvals EU Declaration of Conformity We AECO s.r.l. Via G. Leopardi 5, 20065 Inzago (MI), Italy declare under our sole responsability that the products Product s name: Models: Rotative Level Controls ROTOSTAR RL-A AD1/2 RL - A AD1/2 24Vdc (1) RL - A AD1/2 24Vac (1) RL - A AD1/2 48Vac RL - A AD1/2 110Vac RL - A AD1/2 220Vac ATEX Marking: EC-Type Examination Certificate: Notified body of the EC-Type examination: Monitoring body per appendix IV of the directive 20014/34/EU: II 1/2D Ex t* IIIC T120 Da/Db (*)= a or b DEKRA EXAM Dinnendahlstr 9 D-44809 Bochum n 0158 CESI spa Via R. Rubattino n 54 20134 Milano, Italia n 0722 Tprocesso= -20 +80 Tambiente= -20 +60 to which this declaration relates, meet the requirements of the european directives 2014/34/EU - ATEX directive 2014/30/UE - Electromagnetic directive 2014/35/EU - Low voltage directive and are comply with the following armonized standards EN60079-0: 2012+A11: 2013 EN60079-31 : 2009 EN 61010-1 : 2010 EN 61326-1 : 2013 EN 60529 : 1991+A1:2000 (1)= The unit meet the requirements of the directive 2014/34/EU and 2014/30/EU only. Inzago: 2016.04.20 Maurizio Scaramuzza Legal representative CUE067EX REV. A DOC. FS007EX REV. B DATE: 20.04.2016 pag. 10/10