Installation Instructions FOUNDATION Fieldbus Junction Box Catalog Number 1788-FBJB4R, 1788-FBJB6 Topic Page Important User Information 2 About the Junction Boxes 3 Additional Resources 3 Installation Requirements 4 Wire the Junction Box 8 Set DIP Switches 11 Operate the Junction Box 12 Specifications 13 Certifications (when product is marked) 15 Dimensions 16
About the Junction Boxes FOUNDATION Fieldbus Junction Box 3 The 1788-FBJB4R and 1788-FBJB6 junction boxes provide a simple and fault tolerant means of connecting a FOUNDATION Fieldbus network. The 1788-FBJB4R connects to up to four field devices and has dual trunk input and output connectors for use in redundant FOUNDATION Fieldbus configurations. The 1788-FBJB6 has a single trunk input connector and trunk output connector and connects to up to six field devices. The junction box continuously monitors the bus current on each field device port. If a field device port over-current fault is detected, current to the faulted port is limited to a safe value. Even with one drop line shorted, all other field devices are able to communicate. Additional Resources These documents contain additional information concerning related products from Rockwell Automation. Resource FOUNDATION Fieldbus Linking Devices Technical Data, publication 1788-TD001 FOUNDATION Fieldbus Design Considerations Reference Manual, publication PROCES-RM005 EtherNet/IP and ControlNet to FOUNDATION Fieldbus Linking Device User Manual, publication 1788-UM057 Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1 Product Certifications website, http://www.ab.com Description Provides technical data and specifications for the FOUNDATION Fieldbus linking devices. Provides design choices and best practices for implementing a FOUNDATION Fieldbus network with the 1788-EN2FFR and 1788-CN2FFR linking devices. Describes installation and operation of the 1788-EN2FFR and 1788-CN2FFR linking devices. Provides general guidelines for installing a Rockwell Automation industrial system. Provides declarations of conformity, certificates, and other certification details. You can view or download publications at http://www.rockwellautomation.com/literature/. To order paper copies of technical documentation, contact your local Allen-Bradley distributor or Rockwell Automation sales representative.
8 FOUNDATION Fieldbus Junction Box Wire the Junction Box Use IEC61158-2 cable color coding for wiring the FOUNDATION Fieldbus and device connectors as shown in the figure. Do not wire more than one conductor on any single terminal. 1 2 3 1 2 3 Red Green FB+ FB- Shield WARNING: Temperature rating of conductors must be greater than 82 C (179.6 F).
1788-FBJB4R Wiring FOUNDATION Fieldbus Junction Box 9 Connect the FOUNDATION Fieldbus trunk and field devices to the1788-fbjb4r junction box as shown Item Description A1, B1 Redundant input pair A2, B2 Redundant output pair D1 D4 Field device drops
10 FOUNDATION Fieldbus Junction Box 1784-FBJB6 Wiring Connect the FOUNDATION Fieldbus trunk and field devices to the 1788-FBJB6 junction box as shown Item Description T1, T2 FOUNDATION Fieldbus trunk input, output D1 D6 Field device drops
Trunk Trip (1788-FBJB4R only) FOUNDATION Fieldbus Junction Box 13 If a trunk goes into over-current state, it will trip the specific trunk while keeping the rest of the redundant bus active. The trip will remove the supply from the over-current trunk and set the trunk LED to red. The fault latch does not unlatch when the fault has been removed. You must reset the trunk trip by either pressing the Reset button or setting DIP switches 3 and 4 to enable an auto-reset. Specifications Specifications - FOUNDATION Fieldbus Junction Boxes Specification Input Voltage Value 1788-FBJB4R 12 32V DC, 0.5 A, Class 2/SELV Trunk Output Voltage 12 32V DC, 0.36 A, resistive only Drop Output Voltage Power Consumption Drop Current 12 32V DC, 40 ma, resistive only 40 ma at 24V max 40 ma 1788-FBJB6 Trunk Current 360 ma 480 ma Trunk Trip Current 490 ma N/A Isolation Voltage Temperature, Operating Temperature, Surrounding Air, Max Temperature, Nonoperating North American Temperature Code no isolation between communication channels 12 32V DC, 0.48A, Resistive Only IEC 60068-2-1 (Test Ad, Operating Cold), IEC 60068-2-2 (Test Bd, Operating Dry Heat), IEC 60068-2-14 (Test Nb, Operating Thermal Shock): 0 60 C (32 140 F) 60 C (140 F) IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold), IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat), IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock): 0 60 C (32 140 F) T4
14 FOUNDATION Fieldbus Junction Box Specifications - FOUNDATION Fieldbus Junction Boxes Specification IEC Temperature Code Relative Humidity Vibration Shock, operating Shock, nonoperating Emissions Value 1788-FBJB4R T4 IEC 60068-2-30 (Test Db, Unpackaged Damp Heat): 5 95% noncondensing IEC 60068-2-6 (Test Fc, Operating): 0.5g@10 500 Hz IEC 60068-2-27 (Test Ea, Unpackaged Shock): 15g IEC 60068-2-27 (Test Ea, Unpackaged Shock): 30g CISPR 11 (IEC 61000-6-4): Class A 1788-FBJB6 ESD Immunity IEC 61000-4-2: 6kV contact discharges, 8kV air discharges Radiated RF Immunity IEC 61000-4-3: 10V/m with 1 khz sine-wave 80% AM from 80 200 MHz 10V/m with 200 H 50% Pulse 100% AM at 900 MHz 10V/m with 200 Hz 50% Pulse 100% AM at 1890 MHz 3V/m with 1 khz sine-wave 80% AM from 2000 2700 MHz EFT/B Immunity Surge Transient Immunity IEC 61000-4-4: ±3kV at 5 khz on communication ports IEC 61000-4-5: ±2kV line-earth(cm) on communication port Conducted RF Immunity IEC 61000-4-6: 10V rms with 1 khz sine-wave 80% AM from 150 khz 80 MHz Enclosure Type Rating Wire Size Wiring Category (1) Wiring Torque (conductor in terminal) None (open style) Communications connections: 0.205... 0.823 mm 2 (24...18 AWG) solid or stranded copper wire rated higer than 82 C (179.6 F), 1.2 mm (3/64 in.) insulation max. 2 - on communication ports 0.5 0.6 Nm (4.4 5.3 lb-in) (1) Use this Conductor Category information for planning conductor routing. Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1.
FOUNDATION Fieldbus Junction Box 15 Certifications (when product is marked) Certification (1) Description c-ur-us UL Recognized Component Industrial Control Equipment, certified for US and Canada. See UL File E320594 UL Recognized Component Industrial Control Equipment for Class I, Division 2 Group A,B,C,D Hazardous Locations, certified for US and Canada. See UL File E320595 CE RCM Ex European Union 2004/108/EC EMC Directive, compliant with: EN 61326-1; Meas./Control/Lab., Industrial Requirements EN 61000-6-2; Industrial Immunity EN 61000-6-4; Industrial Emissions EN 61131-2; Programmable Controllers (Clause 8, Zone A & B) Australian Radiocommunications Act, compliant with EN 61000-6-4; Industrial Emissions European Union 94/9/EC ATEX Directive, compliant with: EN 60079-15; Potentially Explosive Atmospheres, Protection "n" EN 60079-0; General Requirements II 3 G Ex na IIC T4 Gc X KC Korean Registration of Broadcasting and Communications Equipment, compliant with Article 58-2 of Radio Waves Act, Clause 3 (1) See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and other certification details.
16 FOUNDATION Fieldbus Junction Box Dimensions