SIWAREX JB stainless steel with ATEX. certificate. Weighing systems. SIWAREX JB stainless steel with ATEX certificate.

Transcription

1 SIWAREX JB stainless steel with ATEX certificate Introduction 1 Notes on handling the product 2 Weighing systems SIWAREX JB stainless steel with ATEX certificate Compact Operating Instructions Description 3 Application planning 4 Installing and connecting 5 Technical data 6 Ordering data 7 A Appendix 06/2010 A5E C-01

2 Legal information Legal information Warning notice system This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger. DANGER indicates that death or severe personal injury will result if proper precautions are not taken. WARNING indicates that death or severe personal injury may result if proper precautions are not taken. CAUTION with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken. CAUTION without a safety alert symbol, indicates that property damage can result if proper precautions are not taken. NOTICE indicates that an unintended result or situation can occur if the corresponding information is not taken into account. If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage. Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation for the specific task, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems. Proper use of Siemens products Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The permissible ambient conditions must be adhered to. The information in the relevant documentation must be observed. Trademarks All names identified by are registered trademarks of the Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner. Disclaimer of Liability We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions. Siemens AG Industry Sector Postfach NÜRNBERG GERMANY A5E C-01 P 07/2010 Copyright Siemens AG Technical data subject to change

3 Table of contents 1 Introduction Purpose of this documentation History Trademarks Environmental protection Notes on handling the product Description Applications Properties Design Application planning Alternative EMC cable glands Selection of suitable cables Installing and connecting Qualified personnel Mounting Connecting principle Connection Installing the EMC cable glands and the screw plugs Connecting the shielding Installing the spring-loaded terminal block in the enclosure Connecting spring-loaded terminals Screwing on the cover Technical data Ambient conditions Mechanical and electrical data Explosion protection Electromagnetic compatibility Dimension drawing Ordering data Order no Accessories...22 A Appendix A.1 Technical support...23 Compact Operating Instructions, 06/2010, A5E C-01 3

4 Introduction Purpose of this documentation These instructions contain all the information you need for commissioning and using the device. They are directed at persons who mechanically assemble, connect, start up, and use the device. 1.2 History The following versions of this documentation have been released to date. The changes apply to the previous version: Edition Comment / change 06/2010 Initial release 1.3 Trademarks SIWAREX is a registered trademark of Siemens AG. All other names appearing in these instructions may be trademarks whose use by third parties for their own purposes may infringe upon owners rights. 1.4 Environmental protection Devices described in this programming manual can be recycled owing to the low content of noxious substances in their version. Please contact a certified waste disposal company for eco-friendly recycling and to dispose of your old devices. 4 Compact Operating Instructions, 06/2010, A5E C-01

5 Notes on handling the product 2 Proper usage Proper usage means that this product must only be used within the scope of the technical specifications and intended purposes of these operating instructions. If this device is used properly in compliance with the safety notices, this device will not present any danger. This device can only function correctly and safely if it is transported, stored, set up and mounted correctly. Correct operation of the device must be ensured by complying with the technical specifications. Improper handling can result in death, personal injury or property damage. Notes on liability for defects We expressly point out that the product quality is exclusively and conclusively described in the sales contract. The content of this product documentation is neither part of a previous or existing agreement, promise or legal relationship, nor is it intended to modify these. All obligations on the part of Siemens AG are contained in the respective sales contract, which also contains the complete and solely applicable liability provisions. The provisions defined in the sales contract for the responsibility for defects are neither extended nor limited by the remarks in this document. Delivery information The current scope of delivery is listed on the shipping documents enclosed with the delivery in accordance with the valid sales contract. When opening the packaging, please observe the relevant information. Check the delivery for completeness and undamaged condition. In particular, the order number on the rating plate must be compared to the ordering data. Before you start work, please read these operating instructions. They contain important information and data whose observation ensures the general safety and functionality of this device. The manual will help you to handle this product more easily and efficiently, allowing you to achieve reliable measuring results. Compact Operating Instructions, 06/2010, A5E C-01 5

6 Notes on handling the product Qualified personnel Important notes on connecting In the context of this documentation, qualified personnel are people who are familiar with the installation, mounting, commissioning, and operation of the product. These people must have the following qualifications: They must be trained, instructed and authorized to operate and maintain devices and systems in accordance with their place of work and in compliance with the safety engineering standards for Electrical circuits High pressures Corrosive and hazardous media They must be trained, instructed and authorized to maintain and use appropriate safety equipment according to the standards for safety engineering. In the case of devices with explosion protection, qualified persons must be trained, instructed and authorized to perform work on electrical circuits in plants subject to explosion hazards. WARNING Electric shock The SIWAREX JB junction box must only be used with extra-low voltages 30 V. Important notes on cleaning CAUTION Malfunction Do not subject the junction box directly to the jet from a high-pressure cleaner. Explosion protection WARNING Danger of explosion Observe the test certificates, provisions and laws applicable in your country during connection, assembly and operation. For hazardous areas, these are for example: IEC (international) EN (previously VDE0165, T1) (EU, Germany) The operational safety directive (Germany) All work undertaken on electrical circuits in hazardous areas must only be performed by skilled personnel. 6 Compact Operating Instructions, 06/2010, A5E C-01

7 Description Applications Field of application The stainless steel SIWAREX JB junction box is used in weighing systems with extra-low voltages 30 V. The junction box can connect up to four load cells to the weighing module at the same time. Operating principle Load cells with 4-wire and 6-wire strain gauges can be connected. The cable connection from the junction box to the weighing module is implemented with a 6- wire cable. LC LC 4/6 JB 6 W LC LC LC Load cell JB SIWAREX JB junction box W Weighing module Figure 3-1 Principle of application Compact Operating Instructions, 06/2010, A5E C-01 7

8 Description 3.2 Properties 3.2 Properties The SIWAREX JB junction box has the following properties: It consists of stainless, acid-resistant steel It is protected against dust and jet water according to protection class IP66. The junction box is maintenance-free. The cables are fed into the junction box via EMC cable glands. The cable glands are made of nickel-plated brass. Unneeded openings for cable glands are sealed with a cap screw. Electromagnetic compatibility: Installing the shield in the cable glands provides a high degree of protection against interference. 3.3 Design Cover Screw for cover (4x) Rear side with nameplate and ATEX plate Lower part Support for mounting EMC cable gland Figure 3-2 Design 8 Compact Operating Instructions, 06/2010, A5E C-01

9 Description 3.3 Design Nameplate The nameplate shows the order number and other important product information. The following example explains the information on the nameplate Product name Degree of protection Consult operating instructions Development stage Manufacturer Country of origin Serial number Order no. Figure 3-3 Nameplate ATEX plate 1 Certification data in accordance with ATEX Figure 3-4 ATEX plate Compact Operating Instructions, 06/2010, A5E C-01 9

10 Application planning Alternative EMC cable glands If you need stainless steel EMC cable glands, you can purchase them from corresponding suppliers. Please note that the cable glands must be approved for the respective applications. See Service and support ( Note Further information can be found under Ordering data (Page 22) 4.2 Selection of suitable cables Signal cable The junction box is connected to the weighing module by means of a signal cable. Use a shielded cable with six cores as the signal cable. We recommend the SIWAREX cable Li2Y2x0.75St+2x(2x0.34St)-CY: For standard applications: 7MH4702-8AG, orange sheath color. For intrinsically safe Ex applications: 7MH4702-8AF, light blue sheath color. The cables and lines must correspond to the installation regulations according to EN In hazardous areas, the diameter of individual conductors must not be smaller than 0.1 mm. WARNING Short circuit/explosion hazard At an ambient temperature T 60 C, use heat-resistant cables which are approved for an ambient temperature at least 20 K higher. Note The maximum cable length between the load cell and the weighing module is stated in the weighing module documentation. 10 Compact Operating Instructions, 06/2010, A5E C-01

11 Application planning 4.2 Selection of suitable cables Suitable cables for spring-loaded terminals The following cables are suitable for connecting to the spring-loaded terminals Cross section mm² AWG mm² AWG Design Solid Stranded Finely-stranded - with galvanized individual wires Finely-stranded - compacted strands Finely-stranded with gas-tight crimped-on pin cable lug Finely-stranded with gas-tight crimped-on end sleeves CAUTION Short-circuit Use end sleeves for small conductor cross-sections. Otherwise the stripped litz wire may buckle when it is inserted into the terminal. In this case, the line is clamped onto the insulation, which will cause contact problems. Load cell cables DMS load cells are supplied with connecting cables. Connecting a PAL cable For non-intrinsically safe use of the junction box, a PAL cable must be connected. An M6x12 bolt is provided for this on the mounting flange. The PAL cable must be protected against becoming loose on its own, which is achieved by a cable eye crimped to the cable. WARNING Danger of explosion Please observe that in the case of shielded cables of intrinsically safe circuits in hazardous areas, only one grounding is permissible. If grounding is to be on both sides, an equipotential bonding conductor with at least 4 mm² must be connected. Compact Operating Instructions, 06/2010, A5E C-01 11

12 Installing and connecting 5 WARNING Danger of explosion Observe the test certificates, provisions and laws applicable in the country of operation during connection, assembly, and operation. For hazardous areas in Europe, for example, this is EN Qualified personnel The SIWAREX JB junction box must only be mounted and connected by qualified personnel. 5.2 Mounting You can mount the SIWAREX JB junction box in any position. Preferrably, the cable glands should point downward. 1. Prepare the location for mounting. Position the corresponding drill holes, see Dimension drawing (Page 21). 2. Screw the junction box tight with four screws. 12 Compact Operating Instructions, 06/2010, A5E C-01

13 Installing and connecting 5.3 Connecting principle 5.3 Connecting principle Load cells with four-wire system 1. Connect the load cells to the weighing module according to the circuit diagram. EXC- SENSE- EXC- SENSE- SIG- SIG- EXC+ SENSE+ SIG+ EXC+ SENSE+ SIG+ Figure 5-1 Connecting principle for load cells with four-wire system 2. Install the following jumpers: Jumper From terminal To terminal 1 EXC SENSE 2 EXC+ SENSE+ NOTICE If the jumpers are missing, the weighing module will report a wire break. Compact Operating Instructions, 06/2010, A5E C-01 13

14 Installing and connecting 5.3 Connecting principle Load cells with six-wire system 1. Connect the load cells to the weighing module according to the circuit diagram. EXC- SENSE- SIG- EXC- SENSE- SIG- EXC+ SENSE+ EXC+ SENSE+ SIG+ SIG+ Figure 5-2 Connecting principle for load cells with six-wire system 14 Compact Operating Instructions, 06/2010, A5E C-01

15 Installing and connecting 5.4 Connection 5.4 Connection Installing the EMC cable glands and the screw plugs LC W PAL Figure 5-3 Input for the connecting cable of a load cell Output to the weighing module or to the "Ex barrier" Equipotential bonding conductor Assignment of the cable glands 1. Install an EMC cable gland for each load cell that is to be connected. The position of the cable glands is shown in the figure above. 2. Open the cover of the junction box. 3. Close any unused openings in the SIWAREX JB enclosure using a cap screw. WARNING Measurement inaccuracies/risk of explosion The cables must be matched to the cable glands. If you use the provided M16x1.5 cable glands, only cables with a diameter of 7 to 12 mm may be laid into the device. After installation, make sure that the cables are positioned securely and that the seals are in the correct position. Compact Operating Instructions, 06/2010, A5E C-01 15

16 Installing and connecting 5.4 Connection Connecting the shielding 1. Connect the cable shielding in the EMC cable glands so that it covers a broad area. Figure 5-4 Connecting the shielding in the EMC cable gland Installing the spring-loaded terminal block in the enclosure Figure 5-5 Mounting the spring-loaded terminal block on the mounting rail 1. Tighten the two screws on the mounting rail by one turn each. 2. Slide the spring-loaded terminal block on one side under the applied screw Insert the spring-loaded terminal block Screw the spring-loaded terminal block firmly into place. 16 Compact Operating Instructions, 06/2010, A5E C-01

17 Installing and connecting 5.4 Connection Connecting spring-loaded terminals Figure 5-6 Pin assignment of the spring-loaded terminals In order to connect the spring-loaded terminals, you require a screwdriver with a maximum blade width of 2.5 mm. 1. Strip the insulation from the cables as shown. 8-9 mm Figure 5-7 Strip cable 2. Push the screwdriver into the rectangular opening 1. This opens the spring clip of the spring-loaded terminal. Figure 5-8 Connection of spring-loaded terminals 3. Insert the stripped wire into the round opening as far as the stop Remove the screwdriver from the rectangular opening 3. The spring clip firmly holds the stripped wire and establishes the contact. The use of spring-loaded terminals ensures that the contact pressure being exerted is permanently maintained. Note The use of spring-loaded terminals ensures that the contact pressure being exerted is permanently maintained. Compact Operating Instructions, 06/2010, A5E C-01 17

18 Installing and connecting 5.4 Connection Screwing on the cover Requirements CAUTION Loss of degree of protection Prior to closing the cover, check to ensure that: No dirt or cable residues are in the enclosure. Such residues could lead to faults or short-circuits. The sealing surfaces are clean. The necessary cable glands are installed and screwed tightly in place. Unused openings are closed using the supplied screw plugs. WARNING Loss of degree of protection Degree of protection IP66 is only guaranteed if the device was installed perfectly. Please note that if the device is open or not completely closed, this degree of protection is no longer guaranteed. Procedure 1. Place the cover and screw it on properly. 18 Compact Operating Instructions, 06/2010, A5E C-01

19 Technical data Ambient conditions Ambient condition Value Ambient temperature - 50 C C Storage temperature - 50 C C Type of protection: IP66, DIN Mechanical and electrical data Variable Value Enclosure dimensions See Dimension drawing (Page 21) Enclosure material Stainless steel Weight Color Approx. 1.5 kg Polished stainless steel Electrical connection Spring-loaded terminals 1.5/1 mm 2 Cable glands Load cells Signal cable Screw connection M16 x 1.5 mm M20 x 1.5 mm Terminal area mm mm Vibration test of the terminals Acc. to DIN EN : Hz, amplitude 0.35 mm Variable Rated voltage Rated current Conductor cross-section Value max. AC 250 V max. 10 A per terminal max. 1.5 mm² 19 Compact Operating Instructions, 06/2010, A5E C-01

20 Technical data 6.3 Explosion protection 6.3 Explosion protection In hazardous areas, it is only permitted to use components with the appropriate Ex approval. The junction box can be used in hazardous areas even for connecting an intrinsically safe circuit according to EN or EN In zone 20, certified circuits in category ia, ib or iad, ibd are permitted. The terminals meet the requirements for disconnecting intrinsically safe circuits: The creepage distance and clearance are greater than 8 mm. Only connect the device to circuits that comply with the technical data specified on the nameplate or on the certificates and approvals (e.g., the EC-type examination certificates). If the circuits do not comply with the information in the certificates and approvals, then the safety required for the approval is longer guaranteed. When using the junction box for type of protection na, the junction box must be included in the local potential equalization. The external and internal connection in the cover must be used for this purpose. Use a cable eye that is crimped to the cable to do this. The minimum cross-section of the PAL connecting cable must be the same or greater than the crosssection of the phase conductor. The washer that is also to be used must ensure that the contact pressure is permanently maintained. The four cover screws must be screwed tight. Before loosening the cover screws, all of the circuits must be de-energized. The circuits that are connected must be either only intrinsically safe or only non-intrinsically safe. Mixing is not allowed. If the SIWAREX JB junction box is operated with the marking II 1 D Ex tb + ib IIIC T85 C Da IP66 in hazardous zone 20, then the feeding circuit must meet the requirements of protection type "intrinisically safe" Cat. ia or Cat. ib in connection with another recognized protection type. 6.4 Electromagnetic compatibility The SIWAREX JB junction box meets the following EMC requirements: EN 61326: 1999 EN 45501: 1992 NAMUR NE21: 2004 To maintain the electromagnetic compatibility, for example, ensure that the cables are routed with electromagnetic compatibility (even within cabinets!). lay the signal cable segregated from cables with voltages > 60 V or high currents. avoid sites neighboring large electrical systems 20 Compact Operating Instructions, 06/2010, A5E C-01

21 Technical data 6.5 Dimension drawing 6.5 Dimension drawing Figure 6-1 Dimension drawing Compact Operating Instructions, 06/2010, A5E C-01 21

22 Ordering data Order no. Junction box Designation SIWAREX JB stainless steel with ATEX certificate Order no. 7MH4710-1EA Accessories EMC cable glands, stainless steel Recommended suppliers: RST Rabe-System-Technik und Vertriebs-GmbH Otto-Lilienthal-Str Wallenhorst Germany Phone: +45 (0) / Fax: +45 (0) / Internet: RST in the Internet ( Signal cable Recommended cable: SIWAREX cable Li2Y2x0.75St+2x(2x0.34St)-CY Application Sheath color Order no. Standard applications Orange 7MH4702-8AG Intrinsically safe Ex application Light blue 7MH4702-8AF Compact Operating Instructions, 06/2010, A5E C-01 22

23 Appendix A A.1 Technical support Technical Support You can contact Technical Support for all IA and DT products: Via the Internet using the Support Request: Support request ( (mailto:support.automation@siemens.com) Phone: +49 (0) (0.14 /min on German landlines, prices may vary for mobile systems) Fax: +49 (0) (0.14 /min on German landlines, prices may vary for mobile systems) Further information about our technical support is available in the Internet at Technical Support ( Service & Support on the Internet In addition to our documentation, we offer a comprehensive knowledge base online on the Internet at: Services & Support ( There you will find: The latest product information, FAQs, downloads, tips and tricks. Our newsletter, providing you with the latest information about your products. A Knowledge Manager to find the right documents for you. Our bulletin board, where users and specialists share their knowledge worldwide. You can find your local contact partner for Industry Automation and Drives Technologies in our partner database. Information about field service, repairs, spare parts and lots more under "Services." Additional Support Please contact your local Siemens representative and offices if you have any questions about the products described in this manual and do not find the right answers. Find your contact partner at: Partner ( A signpost to the documentation of the various products and systems is available at: Documentation ( 23 Compact Operating Instructions, 06/2010, A5E C-01

24 Appendix A.1 Technical support 24 Compact Operating Instructions, 06/2010, A5E C-01