The PROFIBUS PA fieldbus system meets the requirements of the chemical, pharmaceutical and petrochemical industry. Essential

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The PROFIBUS PA fieldbus system meets the requirements of the chemical, pharmaceutical and petrochemical industry. Essential features: Standardized application profile Use in hazardous areas Bus power
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The PROFIBUS PA fieldbus system meets the requirements of the chemical, pharmaceutical and petrochemical industry. Essential features: Standardized application profile Use in hazardous areas Bus power supply and fieldbus communication via shielded and twisted pair cables Online device replacement without impairing plant processes Diagnostic functions for asset management Turck's PROFIBUS PA fieldbus components are specially designed for use in harsh industrial environments and enable the plug and play connection of field devices to the control system. Whether junction boxes, connectivity products or complete systems are required: The user can select the right bus product for the particular application from an extensive product range. You will find the complete solution spectrum at Turck for process automation with : The portfolio includes power supplies, power conditioners, multibarriers as well as junction boxes in IP20 and IP67. The range also includes passive connectivity products such as fieldbus cables, field distributors and terminating resistors. The components are suitable for use in harsh environments and can be mounted directly on the machine or in the process. Hans Turck GmbH Co. KG Mülheim an der Ruhr, Germany Overview Fieldbus Cables - M12 x 1, 7/8 Page 472 Field-Wireable Connectors - M12 x 1, 7/8 Page 476 Receptacles - M12 x 1, 7/8 Page 480 Isolated Device Coupler - Multibarriers Page 484 Junctions - IP67, IP20 Page 488 Fieldbus display Page 496 Accessories Page PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X Basics Basics Bus Physics With the release of the international standard IEC in October 1994, a suitable transmission technology for FOUNDATION fieldbus and applications was found and internationally specified. This was later included as EN in the European standards. Both systems operate according to IEC and use the voltage mode with a transmission speed of kbps. The data packets are modulated upon the supply voltage for the fieldbus devices and transmitted via a 2-wire shielded cable. Topology With, system integration is implemented using a DP/PA segment coupler, starting from the PROFIBUS-DP fieldbus. The segment coupler adapts the RS485 transmission characteristics to IEC transmission technology. If the DP segment operates at a higher speed, an additional link (coupler) is required. The segment coupler for non-ex applications provides adequate power for a sufficient number of fieldbus stations. (Fig. 2). Host PC bus voltage fieldbus data signal 0,75...1,0 V SS PROFIBUS-DP RS V DP/PA Link/Coupler excom Junction box JBBS t Fig. 1 Transmission of data packets according to IEC These bus characteristics provide a decisive advantage: Fieldbus communication and power supply of the bus stations can be implemented via a single cable. Compared to the usual fieldbus solution involving additional wiring effort, these bus characteristics provide increased reliability and lower costs. Physical Layer according to IEC Characteristic features of the IEC transmission physics IEC Data transmission digital, bit synchronous, Manchester coding Transmission speed kbit/s, voltage mode Data security preamble, fault protected start and end delimiter Cable shielded and twisted 2-wire cable Remote supply of the optionally via signal cables stations Protection classes intrinsically safe (Ex ia/ib or Ex ic), increased safe (Ex e or Ex na) and explosion protected (Ex d/m/p/q) Topology spur and tree topologies; also in combination Number of stations up to 32 stations per cable segment Repeater can be extended with a maximum of 4 repeaters Fig. 2 Fieldbus Node Topology PROFIBUS-DP in the non-hazardous area with DP/PA coupler A coupler with an intrinsically safe output is required for Ex applications, which reduces the output power and thus reduces the number of connected fieldbus devices. Only a few stations can be supplied, depending on the current consumption of the fieldbus devices (Fig. 3). PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X PTB 00 ATEX 0000 X Host PROFIBUS-DP RS485 DP/PA Link/Coupler Exi output Junction box JBBS-48.../Ex PC excom Multibarrier The MBD40-T /Ex multibarrier increases the maximum number of fieldbus stations in the network to 32 field devices. The fieldbus supply is implemented with increased safety and is looped from multibarrier to multibarrier. The fieldbus stations in Zone 0 are fed via four or eight intrinsically safe outputs. The possibility of cascading the multibarrier on a single segment in the Ex area and thus utilizing the complete range of functions of the bus systems provides considerable cost benefits. All field devices can be operated on a single fieldbus segment in the Ex area.the multibarrier is supplied via the bus, a separate supply cable is unnecessary. Fig. 3 Fieldbus Node Topology PROFIBUS DP in the Ex area with DP/PA coupler (equipped with intrinsically safe outputs) A topology providing the combination of a trunk line with increased safety and intrinsically safe outputs provides a solution. The multibarrier is used for this, which allows in the trunk line area a current of up to 10 A and connected in series up to 32 intrinsically safe stations in the Ex area. Fig. 4 shows the typical configuration of a network with Turck multibarriers. The number of connectible multibarriers and the usable cable length depend on the output power of the DP/PA coupler, as well as on the type of cable used. For the trunk line Turck recommends the use of the type FBY.../LD long distance cable, for the outputs the type FBY /SD standard cable. Zone 1 Zone 0 Ex e PC MBD48-T415/Ex PROFIBUS-DP RS485 Ex e MBD48-T415/Ex Host DP/PA Coupler Segment out Trunk in Trunk out MBD48-T415/Ex Multibarrier 120 m excom Thanks to the Ex e protection class, the Turck multibarrier can be installed in Zone 1 (II 2 G) according to Directive 94/9/EC (ATEX 95a). Inside Zone 1 the multibarrier is connected to the trunk line of a fieldbus according to IEC via cables and terminals with increased safety protection (Ex e). This has the benefit that the same performance is available in both the Ex- and non-ex area. Through the integrated short circuit protection only the affected output is disconnected in the event of a short circuit in a fieldbus station; the trunk line and the other outputs of the fieldbus segment remain operational. The multibarrier is designed with protection to IP66 and can be installed directly in the plant. The Ex e cable glands in combination with high quality removable screw terminals ensure a rapid and safe connection. Functions That Supplement the Standard: FISCO Conformity: The outputs of the multibarrier comply with the requirements of an Ex power supply and are FISCO-compliant. Connectible terminating resistor: The multibarriers have an integrated terminating resistor. This resistor must be activated if the multibarrier is the last device on the trunk line. Climatic compensation: The multibarrier is provided with a pressure compensation element with protection class IP66 to prevent condensation. The eptfe diaphragm inside the breather has a very high water inlet pressure and is oil resistant. Salt crystals are also kept out 100 %. Junction Boxes The Turck junction boxes can be used in Zone 2 and Zone 1 and can be easily and safely connected to the fieldbus. Junctions for the distribution of power and data are available in various types, offering different numbers of channels, designs and other features such as integrated short-circuit protection, connectible terminating resistor and selectable shielding. Special solutions are available on request. Fig. 4 Topology in the Ex area with multibarriers Basics Junction boxes and T-splitters in IP67 with and without short circuit protection (1-, 4- and 6-channel): Ex junction box (use in Zone 1 or 2, distribution of Ex ia signals in Zone 0) Non-Ex junction box Protection class IP67 Connectible terminating resistor Optional shield concept (solid or capacitive ground) Short circuit current limitation per spur Pressure compensation element protects against condensation Housing material: powder coated die-cast aluminum (4- and 6-channel) Connectivity: 7/8 stainless steel receptacles, M12 or cage clamp terminals Cable glands made from plastic, stainless steel or nickelplated brass, EMC cable glands Temperature range: -25 C +70 C Junction boxes in IP20 with and without short circuit protection (4-, 6-, 8- and 12-channel): Suitable for use in Ex and non-ex areas, use in Zone 1 or 2, distribution of Ex ia signals in Zone 0 Protection class IP20 Connectible terminating resistor Optional shield concept (solid or capacitive ground) Short circuit current limitation per spur Housing material: aluminum Connectivity: cage clamp terminals or removable screw terminals Temperature range: -40 C +70 C Cable Technology Cable Technology Basics The transmission of energy and data via a fieldbus requires a IEC compliant 2-wire cable as the transmission medium. Cable Parameters Although electrical specifications are not stated, they determine the achievable properties of the fieldbus such as bridgeable distances, the number of stations and electromagnetic compatibility. The table s of cable according to IEC shows four types of standard cable (at +25 C). Cable types to IEC Cable design A (Reference) Twisted conductor pair B One/multiple twisted conductor pairs, overall shield Conductor cross- 0.8 mm 2 (AWG 18) 0.32 mm 2 (AWG 22) section (nominal) Loop impedance 44 Ω/km 112 Ω/km (DC current) Wave resistance 100 Ω ± 20 % 100 Ω ± 30 % at khz Wave attenuation 3 db/km 5 db/km at 39 khz Capacitive asymmetry 2 nf/km 2 nf/km Group delay 1.7 µs/km not specified distortion ( khz) Degree of shield 90 % not specified coverage Recommended network expansion (incl. spur lines) 1900 m 1200 m Cable types to IEC Cable design C Multiple twisted conductor pairs, not shielded D Multiple twisted conductor pairs, not shielded Conductor cross mm 2 (AWG 26) 1.25 mm 2 (AWG 16) section (nominal) Loop impedance 264 Ω/km 40 Ω/km (DC current) Wave resistance not specified not specified at khz Wave attenuation 8 db/km 8 db/km at 39 khz Capacitive asymmetry not specified not specified Group delay not specified not specified distortion ( khz) Degree of shield not specified not specified coverage Recommended network expansion (incl. spur lines) 400 m 200 m Tab. 1 Cable types according to IEC Using the Individual Cable s New equipment installations require the use of cables that meet the minimum requirements of type A. Cable types C and D should only be used in so-called retrofit applications (use of already installed cables) for greatly reduced network expansions. However, it should be noted that in these cases, the interference immunity of the transmission often does not meet the requirements described in the standard. Installations according to the FISCO Model The installations according to the FISCO model are not subject to safety restrictions when the limits given in Tab. 2 are complied with. Operation outside these limits is not generally excluded, but does require the consideration of each individual case. All cables offered by Turck for fieldbus systems according to IEC are at least equal to the type A quality. Limit values for attenuation, distortion, reflection, signal propagation time Each fieldbus installation must comply with certain rules, the Network configuration rules (see IEC , chap ). They define limit values for the attenuation, reflection and distortion permissible in the network (rule 8) as well as the maximum signal delay (rule 4) (see table Limit values ). Limit values for attenuation, distortion, reflection and propagation delay Attenuation between any two bus interfaces (at khz) Attenuation distortion a (f = 39 khz) a (f = 7.8 khz), monotonic increasing with frequency 10.5 db 6 db Reflection factor at any point 0.2 ( khz) Signal delay between any two bus interfaces 640 µs Maximum spur line lengths Number of Devices 1 device per spur line 2 devices per spur line 3 devices per spur line 4 devices per spur line m 1 m 1 m 1 m m 1 m 1 m 1 m m 30 m 1 m 1 m m 60 m 30 m 1 m m 90 m 60 m 30 m Tab. 4 Maximum spur length Recommendation: Use only one device per spur and max. 12 devices per segment. IInstrumentation according to FISCO In an EEx i instrumentation according to FISCO, the maximum extent of the trunk line in the hazardous area is 1000 m. The maximum spur length should not exceed 60 m. Topology Within the limits shown on the previous page different topologies such as star, tree or linear structure and any cable is accepted. For an optimum design the individual calculation of the four variables in the table Limit values for all possible connections between two bus interfaces involves considerable effort. It is advisable to specify rules for a close to optimal basic topology, which when followed guarantees that the limits stated above are not exceeded. A tree or line topology, or a combination of both, is chosen as the basic network model. Such a network is composed of a main cable (trunk line), a number of spurs, connecting elements (connectors or junction boxes) and a terminating resistor. Tab. 2 Limit values for attenuation, reflection, signal propagation time Maximum Cable Length The sum of the trunk cable length and all spur lengths gives the total cable length. Maximum cable lengths (main cable and spur lines) Cable Max. cable lengths (incl. spur lines) A 1900 m B 1200 m C 400 m D 200 m Tab. 3 Maximum cable length (trunk cable and spurs) Recommendation: Always use cable type A. Maximum Spur Length The maximum spur length depends on the number of field devices per spur and is stated in the following table Fieldbus Cables PVC Cable - Black, Orange, Yellow or Blue Fieldbus cable, type A, acc. to IEC PVC jacket, color orange, yellow, blue or black Oil, gas and sunlight resistant For use in the hazardous areas classified as Zone 1 and Zone 2, group II, acc. to IEC Cable cross section: 18/7 AWG (0.8 mm 2 ) Bulk cable: 100, 250, 500, and 1000 meters Connector Number of pins 4 Grip Plastic, PUR, Black Contacts Metal, CuZn, Gold-plated Contact carriers TPU, Black Coupling nut/screw Brass, Protection class IP67 (only when screwed tight) Mechanical Lifespan 100 mating cycles Pollution degree 3 Cable Cable 8 mm 0.30 Cable jacket PVC, BU, BK, OG, YE Core insulation PE-foam with PE-jacket Core cross-section 2 x 0.8 mm 2 Shield Electrical properties at +20 C Current load Rated voltage Shield resistance DC resistance (loop) Nom. Impedance Working capacitance Capacitive earthing Nom. Inductance Damping skew Mechanical and chemical properties plastic-covered aluminum foil, metal side outside, makes contact with drain wire and tinned copper wire 4 A 300 V Nom. 9 Ω /km 43.6 Ω /km 100 ± 20 (31.25 kbit/s) Nom. 60 nf/km max. 2 nf/km 0.7 mh/km max. 3.0 db/km (with f = 39 khz] max. 1.7 µs/km (7.9 khz -39 khz) Max. tensile strength (static) 90 N/mm 2 Bending radius (stationary laying) 5 x Ø Ambient temperature Stationary usage C Non-stationary usage C Hans Turck GmbH Co. KG Mülheim an der Ruhr, Germany M12 1 m RSCV w WSCV w RKCV v WKCV v one-sided premoulded» ø 7,6 M12 x 1 33,5 ø 15 38,5» ø 7,6 M12 x 1 33,5 ø 15 32,0 55,2 M12 x 1 ø 15 48,5 M12 x 1 ø 15 RSCVw RSCV-FBY48x- RSCV-RSCV-FBY48x- RSCV-RKCV-FBY48x- WSCVw WSCV-FBY48x- WSCV-WSCV-FBY48x- WSCV-WKCV-FBY48x- RKCV v RKCV-FBY48x- RKCV-RKCV-FBY48x- WKCV v WKCV-FBY48x- WKCV-WKCV-FBY48x- Note: code (structure): housing cable type FBY48x (x = color BU/BK/OG/YE) *M = variable length in m Pin configuration: male w 2 1 = + (BU) 2 = n.c. 3 = (BU) 4 4 = S (Shield) 3 1 female v = + (BU) 2 = n.c. 3 = (BU) 4 = S (Shield) 7/8 m RSV w WSV w RKV v WKV v one-sided premoulded ø 8,5 ø 15,5 36,0 54,0 7/8-16UN ø 26,0 ø 17,5 ø 7,3 51,25 41,0 7/8-16UN ø 26,0 43,5 34,0 ø 8,5 ø 15,5 18,0 29,0 50,5 7/8-16UN ø 26,0 ø 17,5 ø 7,3 51,25 41,0 7/8-16UN ø 26,0 40,0 30,55 RSVw RSV-FBY48x- RSV-RSV-FBY48x- RSV-RKV-FBY48x- WSVw RKV v WKV v WSV-FBY48x- RKV-FBY48x- WKV-FBY48x- WSV-WSV-FBY48x- RKV-RKV-FBY48x- WSV-WKV-FBY48x- WKCV-WKV-FBY48x- Note: code (structure): housing cable type FBY48x (x = color BU/BK/OG/YE) *M = variable length in m Pin configuration: malew = + (BU) 2 = n.c. 3 = (BU) 4 = S (Shield) female v = + (BU) 2 = n.c. 3 = (BU) 4 = S (Shield) Fieldbus Cables PVC Cable Black, Long Distance Fieldbus cable, type A, acc. to IEC PVC jacket, black Oil, gas and sunlight resistant For use in the hazardous areas classified as Zone 1 and Zone 2, group II, acc. to IEC Cable cross section: 14/7 AWG (2.1 mm 2 ) Bulk cable: 100, 250, 500, and 1000 meters Cable Cable 8 mm 0.30 Cable jacket PVC, Black Core insulation PE-foam with PE-jacket Core cross-section 2 x 2.1 mm 2 Shield Electrical properties at +20 C Rated voltage Shield resistance DC resistance (loop) Nom. Impedance Working capacitance Capacitive earthing Nom. Inductance Damping skew Mechanical and chemical properties plastic-covered aluminum foil, metal side outside, makes contact with drain wire and tinned copper wire 300 V Nom. 6 Ω /km 17.2 Ω /km 100 ± 20 (31.25 kbit/s) Nom. 60 nf/km max. 2 nf/km 0.7 mh/km max. 3.0 db/km (with f = 39 khz] max. 1.7 µs/km (7.9 khz -39 khz) Max. tensile strength (static) 90 N/mm 2 Bending radius (stationary laying) 5 x Ø Ambient temperature Stationary usage C Non-stationary usage C Hans Turck GmbH Co. KG Mülheim an der Ruhr, Germany Cable length [m] CABLE FBY-BK/LD-100M CABLE FBY-BK/LD-250M CABLE FBY-BK/LD-500M CABLE FBY-BK/LD-1000M Field-Wireable Connectors Field-Wireable Connectors M12 1 Number of pins Rated voltage [V] Number of pins Rated voltage Female connector, straight Female connector, angled BMS8141-0/ BKV8140-0/9 Male connector, straight BKV8240-0/9 Male connector, angled BMSS8141-0/ BSV8140-0/ BSV8240-0/9 Connection mode Screw/clamp connection Screw/clamp connection Grip Metal, GD-ZnAL, Gray Plastic, PA, Black Coupling nut/screw Brass, CuZn, Nickel-plated Stainless steel, Contacts Metal, CuZn,CuSnZn, Optalloy-coated Metal, CuZn,CuSnZn, Optalloy-coated Contact carriers PA, Gray PA, Black Protection class IP67 IP67 Current load 4 A 4 A Terminal cross-section mm mm 2 Cable external diameter min. 4 9 mm min. 4 8 mm Storage temperature C C Female connector Male connector Field-Wireable Connectors 7/8 Number of pins Rated voltage [V] Number of pins Rated voltage Female connector, straight Male connector, straight BKV4140-0/ BKV4140-0/ BSV4140-0/ BSV4140-0/11 Connection mode Screw/clamp connection Screw/clamp connection Grip Plastic, PA, Black Plastic, PA, Black Coupling nut/screw Stainless steel, Stainless steel, Contacts Metal, CuZn, Gold-plated Metal, CuZn, Gold-plated Contact carriers TPU, Black TPU, Black Protection class IP67 IP67 Current load 9 A 9 A Terminal cross-section mm mm 2 Cable external diameter min. 6 8 mm min mm Storage temperature C C Female connector Male connector Field-Wireable Connectors Field-Wireable Connectors 7/8 Number of pins Rated voltage [V] Number of pins Rated voltage Female connector, straight Male connector, straight BKV4140-0/ BKV4140-0/ BSV4140-0/ BSV4140-0/16 C
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