Allen-Bradley FLEX Ex Bus Isolator and Flexbus Connector Installation Instructions
Rockwell Automation 1797-BIC is a bus isolator module used to interconnect standard FLEX I/O modules to intrinsically-safe FLEX Ex modules in the same I/O group. It provides safe and reliable data transmission between the two types of modules, allowing for a flexible and cost-effective system design.
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Installation Instructions FLEX Ex Bus Isolator and Flexbus Connector Catalog Numbers 1797-BIC, 1797-CEC Topic Page Important User Information 2 About the Isolator and Flexbus Connector 3 Product Features 4 Intermixed Systems 4 Module Installation 5 Installation in Zone 2 10 Installation in Zone 22 10 Electrostatic Charge 11 Removal and Insertion Under Power 11 European Communities (EC) Directive Compliance 12 Inputs and Outputs 15 Wire the Isolator Module 16 Indicators 17 About the Mounting Kit 17 Specifications 20 Publication 1797-IN513G-EN-P - August 2017 2 FLEX Ex Bus Isolator and Flexbus Connector Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.literature.rockwellautomation.com) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable. In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment. The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams. No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual. Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited. Throughout this manual we use notes to make you aware of safety considerations. WARNING IMPORTANT ATTENTION Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss. Identifies information that is critical for successful application and understanding of the product. Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequences. SHOCK HAZARD Labels may be on or inside the equipment to alert people that dangerous voltage may be present. BURN HAZARD Labels may be on or inside the equipment to alert people that surfaces may reach dangerous temperatures. Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 3 About the Isolator and Flexbus Connector Use the FLEX Ex bus isolator to interconnect standard FLEX I/O modules to intrinsically-safe FLEX Ex modules in the same I/O group 5 7 A-B QUALITY Allen-Bradley A-B 1797 - CEC QUALIT Y Allen-Bradley 1797 - BIC 8 FLEXBUS CONNECTOR FLEXBUS ISOLATOR 2 PWR 1 2 3 4 +V -V +V -V 3 4 1797-CEC 2 6 1797-BIC 1 3 42641 Component Identification 1 Power indicators 2 Label 3 Module locking tab 4 Removable power connector 5 FLEX Ex backplane connector 6 FLEX Ex backplane connector cover 7 Master backplane connector 8 FLEX I/O backplane connector Publication 1797-IN513G-EN-P - August 2017 4 FLEX Ex Bus Isolator and Flexbus Connector Product Features • Provides an IS-compatible mechanism to separate two sections of the backplane allowing IS and non-IS field-device wiring to the same I/O group. • Converts hazardous power to IS-safe power to run one side of the bus receiver/transmitter circuitry and IS-safe FLEX Ex backplane power to slave side modules. • Allows up to eight FLEX Ex modules may be attached to the slave side. Intermixed Systems The bus isolator modules, 1797-BIC and 1797-CEC, let you configure FLEX Ex modules and FLEX I/O modules on the DIN rail when attached to the same adapter and grouped together on appropriate sides of the bus isolator module. This highly flexible, cost-effective solution combines intrinsically safe and nonintrinsically safe systems. Intermixed systems can be configured for use in the: • safe area much like traditional IS and I/O systems. • hazardous and safe control equipment where the distance of physical separation is short. • FLEX Ex I/O with communication adapters that are not intrinsically safe. Mix Systems in the Safe Area Any Communication Adapter Supported by FLEX I/O system . . . . . . . . . . . 1797-CEC 1794-CE3 . . .. Hazardous Area Zone 1 Bus Isolator . . . . . . . . . FLEX I/O system Nonhazardous Area or Zone 2 . Max of 1 m (3.28 ft) FLEX Ex system . 1 . . . 1797-BIC Publication 1797-IN513G-EN-P - August 2017 . .. . . . . . . Field Wiring to Zone 0 40087 FLEX Ex Bus Isolator and Flexbus Connector 5 Module Installation ATTENTION This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate precautions, there may be potential difficulties ensuring electromagnetic compatibility in other environments due to conducted as well as radiated disturbance. This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications. These products are grounded through the DIN rail to the dedicated intrinsic safety ground. Use zinc plated yellow-chromate steel DIN rail to assure proper grounding. The use of other DIN rail materials (such as aluminum or plastic) that can corrode, oxidize, or are poor conductors, can result in improper or intermittent grounding. Make certain that you only connect the FLEX Ex backplane connector to other intrinsically-safe system modules to maintain the integrity of the intrinsically-safe backplane. ATTENTION 1794 Adapter 24V dc Power Supply For proper operation, cycle power to the 1797-BIC module at the same time power is cycled to the associated adapter. 1797 CEC 1797 1797 I/O 1797 I/O 1797 I/O BIC & Base & Base & Base 1797 Power Supply 1797 I/O & Base 42754 Publication 1797-IN513G-EN-P - August 2017 6 FLEX Ex Bus Isolator and Flexbus Connector 1797-CEC Module Installation The 1797-CEC module mounts on a DIN rail. It connects to an adapter or another FLEX I/O module. If using this module with FLEX I/O modules, do not mount between FLEX I/O modules. Mount the 1797-CEC module to the right of FLEX I/O modules. Follow these steps to mount this module. 1. Remove the cover plug (if used) in the male connector of the unit to which you are connecting this module. 2. Position the module on the 35 x 7.5 mm DIN rail A (A-B pt. no. 199-DR1). 3. Rotate the module onto the DIN rail with the top of the rail hooked under the lip on the rear of the module. A 1797-CEC A 42642 4. Press down to lock the module on the DIN rail. 41377 Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 7 If the module does not lock in place, use a screwdriver or similar device to move the locking tab down, press the module flush with the DIN rail and release the locking tab to lock the module in place. 5. Firmly push the module into the adjacent module or terminal base until the units lock together. 1797-CEC 42643 6. To remove the 1797-CEC module, you must work from the right side and remove one module at a time. To disengage a module from its neighbor, place a common, flat-bladed screwdriver between the two modules and turn 1/4 turn to separate the modules. 1797-CEC 42644 7. Then slide the module away from its left neighbor, and release the locking lever to remove the module from the DIN rail. Publication 1797-IN513G-EN-P - August 2017 8 FLEX Ex Bus Isolator and Flexbus Connector Install the 1797-BIC Module The 1797-BIC module mounts on a DIN rail. It connects to a 1797-CEC module. 1. Remove the cover plug (if used) in the male connector of the unit to which you are connecting this module. 2. Position the module on the 35 x 7.5 mm DIN rail A (A-B pt. no. 199-DR1). 3. Rotate the module onto the DIN rail with the top of the rail hooked under the lip on the rear of the module. A 1797-CEC 1797-BIC FLEXBUS ISOLATOR PWR +V 1 -V 2 +V 3 A -V 4 42645 4. Press down to lock the module on the DIN rail. 1797-CEC 1797-BIC FLEXBUS ISOLATOR PWR +V 1 -V 2 +V 3 -V 4 42646 If the module does not lock in place, use a screwdriver or similar device to move the locking tab down, press the module flush with the DIN rail, and release the locking tab to lock the module in place. Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 9 5. Firmly push the module into the adjacent module/terminal base until the units interconnect. 1797-BIC 1797-CEC FLEXBUS ISOLATOR PWR +V 1 -V 2 +V 3 -V 4 42647 6. Install DIN rail locks (supplied with the 1797-BIC module) to meet shock and vibration specifications as listed on page 20. 7. To remove the 1797-BIC module, remove the DIN-rail locks and then slide the module away from its left neighbor, and release the locking lever to remove the module from the DIN rail. WARNING Do not remove the 1797-CEC or 1797-BIC modules under power. Removing these modules under power will break the electrical backplane (flexbus) connections. This can cause personal injury or property damage by: • sending an erroneous signal to your system’s field devices causing unintended machine motion. • causing an explosion in a hazardous environment. • breaking communication to modules beyond this module. Publication 1797-IN513G-EN-P - August 2017 10 FLEX Ex Bus Isolator and Flexbus Connector Installation in Zone 2 The 1797-CEC and 1797-BIC modules must not be exposed to the environment. These modules have a protection factor of IP20. Provide a suitable metal enclosure. WARNING The 1797-BIC module cannot be used as an associated apparatus after its FLEX Ex backplane connector has been exposed to nonintrinsically safe signals. Installation in Zone 22 When the modules are installed in Zone 22, the following cabinets must be used: IVK-ISRPI-V16LC; IVK-ISRPI-V8HYW; or IVK-ISRPI-V8LC. These cabinets can be purchased from: Pepperl+Fuchs GmbH Lilienthalstrasse 200 68307 Mannheim, Germany Attn: PA Sales Dept. Kirsten Becker Telephone +49 776 1298 www.pepperl-fuchs.com The IS-RPI cabinets (type IVK2-ISRPI-V8LC, IVK2-ISRPI-V8HYW, or IVK2-ISPRI-V16LC) ensures the basic protection for the intrinsically safe apparatus of the FLEX Ex system for use in Zone 22. It corresponds with category 3D according to RL 94/9 EG and with the type label marked with the following information: Pepperl+Fuchs GmbH 68307 Mannheim IVK2-ISRPI-V8LC (or IVK2-ISRPI-V8HYW or IVK2-ISRPI-V16LC) II 3 D Ex tD A22 IP54 T70 °C X CE Serial (manufacturing) number Model Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 11 Electrostatic Charge Protect the system against electrostatic charge. Post a sign near this module: WARNING Avoid electrostatic charging. ADVERTÊNCIA! PREVENIR CONTRA O ACÚMULO DE CARGA ELETROSTÁTICA. For your convenience, a sign that can be cut out is included in this installation instruction. Removal and Insertion Under Power WARNING Do not remove the 1797-CEC or 1797-BIC modules under power. Removing these modules under power will break the electrical backplane (flexbus) connections. This can cause personal injury or property damage by: • sending an erroneous signal to your system’s field devices causing unintended machine motion. • causing an explosion in a hazardous environment. • breaking communication to modules beyond this module. Publication 1797-IN513G-EN-P - August 2017 12 FLEX Ex Bus Isolator and Flexbus Connector European Communities (EC) Directive Compliance If this product has the CE mark it is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives. EMC Directive These products are tested to meet the Council Directive 2014/30/EU by applying the following standards: • EN 61000-6-4:2007, Electromagnetic Compatibility (EMC) - Part 6-4: Generic Standard for Industrial Environments (Class A) • EN 61000-6-2:2005, Electromagnetic Compatibility (EMC) - Part 6-2: Generic Standards - Immunity for Industrial Environments • EN 61326-1:2013 (Industrial), Electrical Equipment For Measurement, Control, and Laboratory Use - Industrial EMC Requirements European Hazardous Location Approval (For 1797-BIC) The following applies to products marked II 2G and II 2D • Are Equipment Group II, Equipment Category 2, and comply with the Essential Health and Safety Requirements relating to the design and construction of such equipment given in Annex II to Directive 2014/34/EU. See the EC Declaration of Conformity at http://www.rockwellautomation.com/products/certification for details. • The type of protection is “[Ex ib] IIC” and “[Ex ibD]” according to EN 60079-11. • Comply to Standards EN 60079-0:2006, EN 60079-11:2007, EN 61241-0:2006, and EN 61241-11:2006, reference certificate number DMT 00 ATEX E 056. • Are intended for use in areas in which explosive atmospheres caused by gases, vapors, mists, or air are likely to occur occasionally. Such locations correspond to Zone 1 or 2 classification according to ATEX directive 2014/34/EU. Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 13 European Hazardous Location Approval (For 1797-CEC) The following applies to products marked II 3 G: • Are Equipment Group II, Equipment Category 3, and comply with the Essential Health and Safety Requirements relating to the design and construction of such equipment given in Annex II to Directive 2014/34/EU. See the EC Declaration of Conformity at http://www.rockwellautomation.com/products/certification for details. • Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15:2005 and EN 60079-0:2006. • The type of protection is “Ex nA IIC T4” according to EN 60079-15. IEC Hazardous Location Approval (For 1797-BIC only) The following applies to products with the IECEx certification: • Are intended for use in areas in which explosive atmospheres caused by gases, vapors, mists, or air are likely to occur only infrequently and for short periods. Such locations correspond to Zone 1 or 2 classification to IEC 60079-0. • The type of protection is “[Ex ib] IIC” according to IEC 60079-11. • Comply to Standards IEC 60079-0:2004, IEC 60079-11:2006, reference IECEx certificate number IECEx BVS 09.0025X. FM Compliance If this product has the FM mark, it has been designed, evaluated, tested, and certified to meet the following standards: • FM C1. No.3600:1998, Electrical Equipment for Use in Hazardous (Classified) Locations General Requirements • FM C1. No.3610:1999, Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, III Division 1 Hazardous (Classified) Locations Publication 1797-IN513G-EN-P - August 2017 14 FLEX Ex Bus Isolator and Flexbus Connector • FM C1. No.3615:1989, Explosionproof Electrical Equipment General Requirements • FM C1. No.3810:1989, 1995, Electrical and Electronic Test, Measuring and Process Control Equipment • ANSI/NEMA 250, 1991, Enclosures for Electrical Equipment USL Compliance If this product has the UL mark, it has been designed, evaluated, tested, and certified to meet the following standards: • UL 913, 5th Edition, Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, III, Division 1, Hazardous (Classified) Locations • UL 1604, 3rd Edition, Electrical Equipment for Use in Class I and II, Division 2, and Class III Hazardous (Classified) Locations • UL 1203, 2nd Edition, Explosion-Proof and Dust-Ignition-Proof Electrical • Equipment for Use inHazardous (Classified) Locations • UL 2279, 1st Edition, Electrical Equipment for Use Class I, Zone 0, 1, and 2 Hazardous (Classified) Locations • UL 508, 17th Edition, Standard for Industrial Control Equipment Switches CNL Compliance If this product has the cUL mark, it has been designed, evaluated, tested, and certified to meet the following standards: • CAN/CSA C22.2 No. 157-92, Intrinsically Safe and Non-Incendive Equipment for Use in Hazardous Locations • CAN/CSA C22.2 No. 30-M1986, Explosion-Proof Enclosures for Use in Class I Hazardous Locations • CAN/CSA E79-0-95, Electrical apparatus for explosive gas atmospheres - Part 0: General requirements • CAN/CSA E79-11-95, Electrical apparatus for explosive gas atmospheres - Part 11: Intrinsic safety "i" • CAN/CSA C22.2 No. 14-95, Industrial Control Equipment Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 15 • CAN/CSA E79-15-95, Electrical apparatus for explosive gas atmospheres - Part 15: Electrical Apparatus with Type of Protection "n" Inputs and Outputs Do not apply any noninstrinsically safe signals to the FLEX Ex backplane connector. When using as an intrinsically safe electrical apparatus according to EN 60079-11, the European directives and regulations must be followed. 1797-CEC Flexbus 1797-BIC Flexbus PWR Limit Flexbus IS Flexbus Bus FLEX Ex Bus Bus IS Flexbus +V Standard Power -V Source 41693 Publication 1797-IN513G-EN-P - August 2017 16 FLEX Ex Bus Isolator and Flexbus Connector Wire the Isolator Module ATTENTION When connecting wiring, torque terminal screws to 0.8…1.0 Nm (7…9 lb-in). A-B QUALIT Y Allen-Bradley 1797 - BIC FLEXBUS ISOLATOR POWER 1 2 3 4 +V -V +V -V 42648 WARNING Make certain that you power this device with normal 24V dc. Do not use an intrinsically-safe power supply, such as the 1797-PS2E or 1797-PS2N, to power this module. If you connect or disconnect wiring while the field-side power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding. 1. Apply +V and -V power (24V dc) to the adapter through a removable terminal block. +V -V +V -V +V -V +V -V 41297 Screw terminals and spring terminals are provided. Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 17 2. Strip the +V and -V wires to a length so no bare conductor shows after inserting the wires into position (+V, -V). 3. If you are using the spring terminals of the plug, insert a screwdriver into the slot and carefully pry until the spring clamp opens to accept the wire. 4. Connect either a 1797-TB3 terminal base, a 1794-CE1 cable, or a 1794-CE3 cable onto the FLEX Ex backplane connector of the 1797-BIC module. ATTENTION The FLEX Ex backplane connector cover must remain in place until a FLEX Ex terminal base or cable is connected to the 1797-BIC module. Indicators The 1797-BIC isolator module provides a power indicator to show power has been applied to the module. About the Mounting Kit Use the optional 1794-NM1 mounting kit to mount your system on a panel or wall without a DIN rail. 1794-NM1 Mounting Kit with 18 screws (2 screws for the adapter and 2 screws for each module). 30238 Publication 1797-IN513G-EN-P - August 2017 18 FLEX Ex Bus Isolator and Flexbus Connector Dimensions for Mounting the 1797-BIC Isolator Module 75 (2.95) 1797-BIC 87 (3.4) FLEXBUS ISOLATOR PWR +V 1 -V 2 +V 3 -V mm (in.) 4 94 (3.7) ATTENTION 42649 The DIN rail or mounting bracket must be appropriately connected to the dedicated intrinsic safety ground. Repair The 1797-BIC isolator module is not field-repairable. Any attempt to open the module will void its warranty and the IS certification. If repair is necessary, return the module to the manufacturer. Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 19 Dimensions for Mounting the 1797-CEC Flexbus Connector 69 (2.72) 1797-CEC 80 (3.15) mm (in.) 55 (2.17) ATTENTION 42650 The DIN rail or mounting bracket must be appropriately connected to the dedicated intrinsic safety ground. Repair The 1797-CEC Flexbus Connector module is not field-repairable. Any attempt to open the module will void its warranty. If repair is necessary, return the module to the manufacturer Publication 1797-IN513G-EN-P - August 2017 20 FLEX Ex Bus Isolator and Flexbus Connector Specifications Table 1 1797-BIC Flex Ex Bus Isolator Attribute Value I/O module capacity 8 FLEX Ex modules(1) Indicators Power - green when power is applied Isolation path Flexbus to Flexbus Flexbus slave side to power supply Galvanic to DIN EN 60079-11 Galvanic to DIN EN 60079-11 Power consumption 18…32V dc @ 0.15 A Power source failure Max input Um = 253V ac Power dissipation 2.1 W Thermal dissipation 7.2 BTU/hr IS module type [Ex ib] IIC Conductor wire size 4 mm2 (12 gauge) stranded max 1.2 mm (3/64 in.) insulation max Weight Approx. 200 g Environmental conditions Operational temperature -20…70 °C (-4…158° F) Storage temperature -40…85 °C (-40…185 °F) Relative humidity 5…95% noncondensing Shock operating Tested 30 g peak acceleration, 11 (±1) ms pulse width nonoperating Tested 30 g peak acceleration, 11 (±1) ms pulse width Vibration Tested 5 g @ 10…500 Hz per IEC 68-2-6 Output (intrinsically safe) (16 pin male flexbus connector) CENELEC Uo < 5.75V dc Io < 400 mA Po < 2.05 W Lo < 100 μH Co < 39 μF Output (intrinsically safe) (16 pin male flexbus connector) FM and cULus Vt < 5.75V dc It < 398.25 mA Ca < 39.67 μF La < 210 μH Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 21 Attribute Value Agency certification Marking and classification FM Nonincendive, use for Class I, Division 2 Groups A, B, C and D. Provides Intrinsically safe outputs to Class I, Division 1, Groups A, B, C and D when installed in accordance with Control Drawing No. 1797-RM001 UL, C-UL Associated Apparatus, Class I, Division 2, Groups A, B, C, and D Hazardous Locations; Class I, Zone 2, AEx nA[ia] IIC, Ex nA[ia] IIC T4 (Ta = 70 °C) when installed in accordance with Control Drawing No. 1797-RM001 INMETRO [BR-Ex ib] IIC Approval marks and certification number EXAM (ATEX) DMT 00 ATEX E056 UL, C-UL File No.: E197983 FM INMETRO 05/UL-BRAE-0010 IECEx IECEx BVS 09.0025 Declaration of conformity Marking Directive 2014/30/EU (EMC) Directive 2014/34/EU (ATEX) IECEx IEC temp code 1 II (2) G [Ex ib] IIC II (2) D [Ex ibD] [Ex ib] IIC T4 A total of eight I/O modules can be attached to a 1794 FLEX I/O adapter. The 1797-CEC and 1797-BIC modules are not included in this number. In intermixed systems, the number of 1797 FLEX Ex I/O modules (attached onto the 1797-BIC module) plus the number of 1794 FLEX I/O modules (connected between the adapter and the 1797-CEC module) cannot exceed eight. Publication 1797-IN513G-EN-P - August 2017 22 FLEX Ex Bus Isolator and Flexbus Connector Table 2 Flexbus Connector - 1797-CEC Attribute Value Indicators Not applicable Weight Approx. 100 g Environmental conditions Operational temperature -20…70 oC (-4…158 oF) Storage temperature -40…85 oC (-40…185 oF) Relative humidity Shock 5…95% noncondensing operating Tested 30 g peak acceleration, 11 (±1) ms pulse width nonoperating Tested 30 g peak acceleration, 11 (±1) ms pulse width Vibration Tested 5 g @ 10…500 Hz per IEC 68-2-6 Agency certification Marking and classification FM UL, C-UL Nonincendive, use for Class I, Division 2 Groups A , B, C, and D Hazardous Locations;. A temp rating of T4 applies with Ta = 70 °C. Class I, Division 2, Groups A, B, C, and D Hazardous Locations; Class I, Zone 2, AEx nA IIC, Ex nA IIC T4 (Ta = 70 °C) Approval mark and certificate number UL, C-UL File No.: E197983 FM Declaration of conformity Marking Directive 2014/30/EU (EMC) Directive 2014/34/EU (ATEX) II 3G Ex nA IIC T4 X Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 23 CENELEC Information The isolator type 1797-BIC/* module is an associated apparatus according to EN 60079-11. If the isolator is connected to intrinsically-safe circuits the applicable national local construction, installation and operating regulations must be heeded (in Germany DIN EN 60079-11, DIN VDE 0165). UL Information Diagram 1 Nonhazardous or Hazardous (Classified) Location Class I, Zone 1, Group IIC or Class I, Division 1, Groups A to D Nonhazardous or Hazardous (Classified) Location Class I, Zone 2, Group IIC or Class I, Division 2, Groups A to D . . . 42876 Diagram 2 Nonhazardous or Hazardous (Classified) Location Class I, Zone 2, Group IIC or Class I, Division 2, Groups A to D Nonhazardous or Hazardous (Classified) Location Class I, Zone 1, Group IIC or Class I, Division 1, Groups A to D . . 42877 Publication 1797-IN513G-EN-P - August 2017 24 FLEX Ex Bus Isolator and Flexbus Connector Isolator Restriction 1797-BIC and -CEC Max of 8 I/O modules I/O module capacitance value is cumulative. Ci (total) = Ci (I/O module 1) + Ci (I/O module 2) + ...Ci (I/O module 8). Ci (total) must be less than 65 μF. The limitation of eight I/O modules per isolator is a functional limitation. Refer to table 2 of the appropriate I/O Modules sections in this document (1797-RM001). Application The isolator type 1797-BIC/* module functions as a galvanic isolation barrier for signals between a nonintrinsic backplane bus and an intrinsic safe backplane bus. The isolator must be installed in a safe or Zone 2 area. Cover Plug for IS Backplane Bus The 16-pole male connector for the FLEX Ex IS backplane bus is provided with a cover plug. The cover plug can only be removed when a 1797-TB3 terminal base, a 1794-CE1 cable or a 1794-CE3 cable is connected. The connection must not be connected to any signals that exceed the instrinsically safe values of the IS backplane. Power Supply The isolator is powered via a removable terminal connector with a dc-voltage between 18V and 32V. Due to a failure in the power supply a maximum voltage Um of 253V ac is permitted. IMPORTANT For detailed certification information, refer to the FLEX Ex System Certification Reference Manual, publication 1797-RM001. Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 25 WARNING Avoid electrostatic charging. ADVERTÊNCIA! PREVENIR CONTRA O ACÚMULO DE CARGA ELETROSTÁTICA. Publication 1797-IN513G-EN-P - August 2017 26 FLEX Ex Bus Isolator and Flexbus Connector Notes: Publication 1797-IN513G-EN-P - August 2017 FLEX Ex Bus Isolator and Flexbus Connector 27 Notes: Publication 1797-IN513G-EN-P - August 2017 Rockwell Automation Support Rockwell Automation provides technical information on the Web to assist you in using its products. At http://support.rockwellautomation.com, you can find technical manuals, a knowledge base of FAQs, technical and application notes, sample code and links to software service packs, and a MySupport feature that you can customize to make the best use of these tools. For an additional level of technical phone support for installation, configuration, and troubleshooting, we offer TechConnect Support programs. For more information, contact your local distributor or Rockwell Automation representative, or visit http://support.rockwellautomation.com. Installation Assistance If you experience a problem with a hardware module within the first 24 hours of installation, please review the information that's contained in this manual. You can also contact a special Customer Support number for initial help in getting your module up and running. United States 1.440.646.3434 Monday – Friday, 8am – 5pm EST Outside United States Please contact your local Rockwell Automation representative for any technical support issues. New Product Satisfaction Return Rockwell tests all of its products to ensure that they are fully operational when shipped from the manufacturing facility. However, if your product is not functioning, it may need to be returned. United States Contact your distributor. You must provide a Customer Support case number (see phone number above to obtain one) to your distributor in order to complete the return process. Outside United States Please contact your local Rockwell Automation representative for return procedure. Allen-Bradley, Rockwell Automation, ControlLogix, RSLinx, TechConnect, and FLEX I/O are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies. Rockwell Automation maintains current product environmental information on its website at http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page. Publication 1797-IN513G-EN-P - August 2017 Supersedes Publication 1797-5.13 - June 2010 PN-455774 Copyright © 2017 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A. ">

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Key features
- Provides an IS-compatible mechanism to separate two sections of the backplane allowing IS and non-IS field-device wiring to the same I/O group.
- Converts hazardous power to IS-safe power to run one side of the bus receiver/transmitter circuitry and IS-safe FLEX Ex backplane power to slave side modules.
- Allows up to eight FLEX Ex modules may be attached to the slave side.
Frequently asked questions
The 1797-BIC module is used to interconnect standard FLEX I/O modules to intrinsically-safe FLEX Ex modules in the same I/O group.
Up to eight FLEX Ex modules may be attached to the slave side of the 1797-BIC module.
The 1797-BIC module uses hazardous power to run one side of the bus receiver/transmitter circuitry and IS-safe FLEX Ex backplane power to slave side modules.