Allen-Bradley FLEX Ex 1797-OB4D Installation Instructions Manual
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Allen-Bradley FLEX Ex 1797-OB4D Installation Instructions Manual

Allen-Bradley FLEX Ex 1797-OB4D Installation Instructions Manual

I/o 24v dc 4 non-isolated source output module
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FLEX Ex I/O 24V DC 4 Non-Isolated Source
Output Module
Catalog Number 1797-OB4D
Topic
Installation Instructions
Page
2
5
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8
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11
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29
Publication
1797-5.6 - June 2011

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Summary of Contents for Allen-Bradley FLEX Ex 1797-OB4D

  • Page 1: Table Of Contents

    Installation Instructions FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Catalog Number 1797-OB4D Topic Page Important User Information Installation in Zone 1 Installation on Zone 22 Module Installation Outputs Wire to a 1797-TB3 or 1797-TB3S Terminal Base Unit Ground the Module Indicators Memory Mapping...

  • Page 2: Important User Information

    2 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 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.

  • Page 3: Module Installation

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 3 Module Installation 40231 Label here or under here Component identification FlexBus connector Terminal base unit Latching mechanism Alignment groove Keyswitch Alignment bar Cap plug Module Publication 1797-5.6 - June 2011...
  • Page 4 4 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Install the Module This equipment is considered Group 1, Class A industrial equipment according ATTENTION 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.

  • Page 5: Installation In Zone 1

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 5 6. Make certain that you only connect terminal base units to other intrinsically safe system modules or adapters to maintain the integrity of the intrinsically-safe backplane. 41307 7. Remove the cap plug (4) and attach another intrinsically safe terminal base unit to the right of this terminal base unit if required.
  • Page 6 6 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 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...
  • Page 7 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 7 Removal and Insertion Under Power These modules are designed so you can remove and insert them under WARNING power. However, take special care when removing or inserting modules in an active process.

  • Page 8: Outputs

    8 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module • EN60079-11:2007, Explosive atmospheres - Part 11 : equipment protection by intrinsic safety "i" • EN60079-0:2006, Electrical apparatus for explosive gas atmospheres - Part 0 : general requirements • EN 60079-26 : 2004, Electrical apparatus for explosive gas atmospheres - Part 26 : construction, test and marking of Group II Category 1 G electrical apparatus •...

  • Page 9: Wire To A 1797-Tb3 Or 1797-Tb3S Terminal Base Unit

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 9 Wire to a 1797-TB3 or 1797-TB3S Terminal Base Unit Connect wiring to the terminal base as shown below. Row A CH 0 CH 1 CH 2 CH 3 Row B Row C +V -V +V -V...
  • Page 10 10 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Make certain that you power this module with an intrinsically safe power WARNING supply. Do not exceed the values listed in the specifications for this module. If you connect or disconnect wiring while the field-side power is on, an electrical arc can occur.

  • Page 11: Ground The Module

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 11 Ground the Module All I/O wiring must use shielded wire. Shields must be terminated external to the module, such as bus bars and shield-terminating feed throughs. Shield terminating feed-through Bus bar 30820-M Indicators...

  • Page 12: Memory Mapping

    12 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Status Indicators Indicator Status Description Yellow Individual input present Flashing red Channel fault Solid red Module did not pass power up check Channel 0 is solid red while power-up check is running Memory Mapping Read 0 Write 0...
  • Page 13 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 13 Field Descriptions Overload Alarm 0 = No fault 1 = Output channel overloaded (Load resistance range 30…5000 Ω) 100 Hz (10 ms) filter is integrated Data Output data 0 = Off 1 = On Default = 0 Fault State...

  • Page 14: Repair

    14 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Field Descriptions Alarm Filter These 3 bits are used to set the time constant of the fault/overload alarm filter for channels 0…3. Default = 0 Value Binary Time constant 0.25 ms (Hardware) 0.5 ms 1 ms...

  • Page 15: Specifications

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 15 Specifications General Attribute Value Number of outputs 4, nonisolated, sourcing IS output type Ex ia IIB/IIC T4, AEx ia IIC T4, Class I, II, III Division 1 Groups A, B, C, D, E, F, G T4 IS module type Ex ib IIB/IIC T4, AEx ib IIC T4,...
  • Page 16 16 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module General Power supply < 9.5V DC (+V, -V Intrinsically safe) < 1 A = Negligible = Negligible Module field-side 7.5 W power consumption Power dissipation Thermal dissipation 17.07 BTU/hr Module location 1797-TB3 or 1797-TB3S Terminal base unit Conductors wire size, max...

  • Page 17: Cooperative Operation Of The Controlnet Ex Adapter And Flex Ex

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 17 Certifications Certifications when product Value is marked CENELEC II (1) 2G Ex ib[ia] IIC T4 II (1) D [Ex iaD] UL, C-UL Class I, Groups A, B, C and D; Class II, Groups E, F and G;...

  • Page 18: Flex Ex Output Module Operation

    18 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Adapter Operation Network Communication Monitoring The adapter is the primary monitor of network activity. If it detects loss of network communication, it can be programmed to: • continue writing the last valid received data to the module (hold last state).

  • Page 19: Entity Parameters

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 19 Flexbus Communication Monitoring The module monitors FlexBus communication activity and the state of its Output Enable bit. If it detects loss of FlexBus communication activity or the Output Enable bit transitioning to 0, it can be programmed to: •...
  • Page 20 20 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Entity Parameters Protection Group Allowed Allowed Capacitance Inductance 1797-OB4D Ex ia 677 nF 8 mH = 27.4V 87 nF 2 mH = 110 mA If concentrated capacitance Ex ia 150 nF 5 mH and/or inductance are available,...
  • Page 21 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 21 • UL 1203, Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations • UL 2279, Electrical Equipment for Use in Class I, Zone 0, 1, and 2 Hazardous (Classified) Locations •...
  • Page 22 22 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Key position for 1797-OB4D terminal base FLEX Ex digital insertion output I/O module Indicators Male bus Female bus connection connection Terminal base Terminal base Field wiring terminals 42058 A terminal base may or may not have an I/O module installed. IMPORTANT Publication 1797-5.6 - June 2011...
  • Page 23 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 23 Hazardous (Classified) Location Hazardous (Classified) Location Class I, Zones 0, 1, & 2 Groups IIC, IIB, IIA Class I, Zones 1 & 2 Groups IIC, IIB, IIA Class I, Div. 1 & 2 Groups A, B, C, D Class I, Div.
  • Page 24 24 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module The values of L and C listed in the table above are allowed if one of the following conditions is met: • The total L of the external circuit (excluding the cable) is < 1% of the value or •...
  • Page 25 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 25 • 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 •...
  • Page 26 26 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module Key position for 1797-OB4D terminal base FLEX Ex digital insertion output I/O module Indicators Male bus Female bus connection connection Terminal base Terminal base Field wiring terminals 42058 A terminal base may or may not have an I/O module installed. IMPORTANT Publication 1797-5.6 - June 2011...
  • Page 27 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 27 Hazardous (Classified) Location Hazardous (Classified) Location Class I, Zones 0, 1, & 2 Groups IIC, IIB, IIA Class I, Zones 1 Groups IIC, IIB, IIA Class I, Div. 1 & 2 Groups A, B, C, D Class I, Div.
  • Page 28 28 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module The values of L and C listed in the table above are allowed if one of the following conditions is met: • The total L of the external circuit (excluding the cable) is < 1% of the value or •...

  • Page 29: Output Voltage Versus Current Capability

    FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 29 Output Voltage versus Current Capability Voltage 41313 For detailed certification information, refer to the FLEX Ex System IMPORTANT Certification Reference Manual, publication 1797-6.5.6. WARNING Avoid electrostatic charging. ADVERTÊNCIA! PREVENIR CONTRA O ACÚMULO DE CARGA ELETROSTÁTICA.

  • Page 30: Publication 1797-5.6 - June

    Outside United States Please contact your local Rockwell Automation representative for return procedure. Allen-Bradley, Rockwell Automation, FLEX Ex, ControlLogix, RSLinx, and TechConnect are trademarks of Rockwell Automation, Inc. Publication 1797-5.6 - June 2011 PN -110744 Supersedes Publication 1797-5.6 - February 2006...

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