Related Manuals for Allen-Bradley FLEX I/O 1794-OB8
Summary of Contents for Allen-Bradley FLEX I/O 1794-OB8
-
Page 1: Table Of Contents
Installation Instructions FLEX I/O Digital DC Output Modules Catalog numbers 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P, 1794-OB32P Table of Contents Topic Page Important User Information Environment and Enclosure Preventing Electrostatic Discharge European Hazardous Location Approval North American Hazardous Location Approval Installing Your Digital Output Module Configuring your 1794-OB8EP Output Module Configuring your 1794-OB8, 1794-OB16, 1794-OB16P, and 1794-OB32 Output Modules Specifications... -
Page 2: Important User Information
2 FLEX I/O Digital DC Output Modules 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.rockwellautomation.com/literature/) describes some important differences between solid-state equipment and hard-wired electromechanical devices. -
Page 3: Environment And Enclosure
FLEX I/O Digital DC Output Modules Environment and Enclosure ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664-1), at altitudes up to 2000 m (6562 ft) without derating. This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. -
Page 4: European Hazardous Location Approval
IP54 protection when applied in Class I, Zone 2 environments. • This equipment shall be used within its specified ratings defined by Allen-Bradley. • Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 40% when applied in Class I, Zone 2 environments. -
Page 5: North American Hazardous Location Approval
FLEX I/O Digital DC Output Modules North American Hazardous Location Approval The following modules are North American Hazardous Location approved: 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P. The following information applies when Informations sur l’utilisation de cet operating this equipment in hazardous équipement en environnements dangereux: locations: Products marked "CL I, DIV 2, GP A, B, C, D"... - Page 6 6 FLEX I/O Digital DC Output Modules ATTENTION: FLEX I/O™ is grounded through the DIN rail to chassis ground. Use zinc plated yellow-chromate steel DIN rail to assure proper grounding. The use of other DIN rail materials (for example, aluminum or plastic) that can corrode, oxidize, or are poor conductors, can result in improper or intermittent grounding.
-
Page 7: Installing Your Digital Output Module
FLEX I/O Digital DC Output Modules Installing Your Digital Output Module Description Description Keyswitch Alignment bar Terminal base Groove Flexbus connector Latching mechanism Module The module mounts on a 1794 terminal base. ATTENTION: During mounting of all devices, be sure that all debris (metal chips, wire strands, etc.) is kept from falling into the module. -
Page 8: Publication 1794-In094C-En-P - July
8 FLEX I/O Digital DC Output Modules 3. Make sure the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base. WARNING: If you insert or remove the module while backplane power is on, an electrical arc can occur. - Page 9 FLEX I/O Digital DC Output Modules Wiring Connections for 1794-OB8, 1794-OB16, and 1794-OB16P (used with 1794-TB2, 1794-TB3, or 1794-TB3S Terminal Base Unit) Output Output Terminal Common Terminal Output 0 B-17 Output 1 B-18 Output 2 B-19 Output 3 B-20 Output 4 B-21 Output 5 B-22...
- Page 10 10 FLEX I/O Digital DC Output Modules Wiring Connections for 1794-OB8EP 1794-TB2, 1794-TB3, 1794-TB3S 1794-TBN Output Output Common Output Common Terminal Terminal Terminal Terminal Output 0 A-1/B-17 Output 1 A-3/B-19 Output 2 A-5/B-21 Output 3 A-7/B-23 Output 4 A-9/B-25 Output 5 A-10 A-11/B-27 B-10...
- Page 11 FLEX I/O Digital DC Output Modules 1794-TB2, 1794-TB3, and 1794-TB3S Terminal Base Wiring for 1794-OB8, 1794-OB8EP, 1794-OB16, and 1794-OB16P Outputs Commons Common Common Voltage Voltage Terminals 35 thru 50 not available on 1794-TB2 Out +V In +V Voltage (1794-TB3 shown) Connect -V (Supply Common) to terminal B-16 Connect +V (Supply +Voltage) to terminal C-34 (Use B-33 and C-51 for daisy-chaining to next terminal base unit.)
- Page 12 12 FLEX I/O Digital DC Output Modules Connecting Wiring for the 1794-OB32P 1. Connect individual output wiring (OUT0 to OUT15) to numbered terminals on the 0-15 row (A) as indicated in the Wiring Connections for 1794-OB32P table. 2. Connect the associated power to the +V1 terminal (35, 37, 39, or 41) on the 34-51 row (C) as indicated in the Wiring Connections for 1794-OB32P table.
- Page 13 FLEX I/O Digital DC Output Modules Wiring Connections for 1794-OB32P (used with 1794-TB32 or 1794-TB32S Terminal Base Unit) Output Output Terminal Common Power Output 0 Connect common to Connect power to terminals 36, 38, 40, and terminals 35, 37, 39, and Output 1 Output 2 Output 3...
- Page 14 14 FLEX I/O Digital DC Output Modules Wiring Connections for 1794-OB32P (used with 1794-TB32 or 1794-TB32S Terminal Base Unit) Output Output Terminal Common Power Output 16 B-17 Connect common to Connect power to terminals 44, 46, 48, and terminals 43, 45, 47, and Output 17 B-18 Output 18...
-
Page 15: Configuring Your 1794-Ob8Ep Output Module
FLEX I/O Digital DC Output Modules 1794-TB32 and 1794-TB32S Terminal Base Wiring for 1794-OB32PI Outputs Outputs +V1 COM1 +V1 COM1 +V1 COM1 +V1 COM1 +V2 COM2 +V2 COM2 +V2 COM2 +V2 COM2 +V1 = Terminals 35, 37, 39 and 41 (1794-TB32 shown) +V2 = Terminals 43, 45, 47 and 49 COM1 = Terminals 36, 38, 40 and 42... - Page 16 16 FLEX I/O Digital DC Output Modules Programming the 1794-OB8EP If your program automatically checks for fault bits, bits 8 thru 15 of read word 1 must be masked. This is a sample program for a module at rack address 1, group 0. Add similar rungs to your program.
-
Page 17: Configuring Your 1794-Ob8, 1794-Ob16, 1794-Ob16P, And 1794-Ob32 Output Modules
FLEX I/O Digital DC Output Modules Configuring your 1794-OB8, 1794-OB16, 1794-OB16P, and 1794-OB32 Output Modules You configure your output module by setting bits in the configuration word (word 3). Image Table Memory Map for the 1794-OB8, 1794-OB16, 1794OB16P, and 1794-OB32P Modules Read Not used... -
Page 18: Specifications
18 FLEX I/O Digital DC Output Modules Specifications Specifications – 1794-OB8 Attribute Value Number of outputs 8, current, sourcing Recommended terminal base unit 1794-TB2, 1794-TB3, 1794-TB3S,1794-TB3K, 1794-TB3SK On-state voltage, output min 10V DC On-state voltage, output nom 24V DC On-state voltage, output max 31.2V DC Output current rating 4 A (8 outputs @ 0.5 A) - Page 19 FLEX I/O Digital DC Output Modules Specifications – 1794-OB8EP Attribute Value On-state voltage, output nom 24V DC On-state voltage, output max 31.2V DC Output current rating 2.0 A max per output 10.0 A max per module (8 outputs @ 1.25 A, 5 outputs @ 2.0 A, or similar combinations totaling 10.0 A or less) On-state current, output, min 1.0 mA per channel...
- Page 20 20 FLEX I/O Digital DC Output Modules Specifications – 1794-OB16 and 1794-OB16P Attribute 1794-OB16 1794-OB16P Number of outputs 16, current, sourcing Recommended terminal base unit 1794-TB2,1794-TB3,1794-TB3S, 1794-TB3K, 1794-TB3SK On-state voltage, output min 10V DC On-state voltage, output nom 24V DC On-state voltage, output max 31.2V DC (see Derating Curve for 1794-OB16P) Output current rating...
- Page 21 FLEX I/O Digital DC Output Modules Specifications – 1794-OB32P Attribute Value Number of outputs 32, current, sourcing Recommended terminal base unit 1794-TB32, 1794-TB32S On-state voltage, output min 10V DC On-state voltage, output nom 24V DC On-state voltage, output max 31.2V DC Output current rating 14.0 A max per module (6 A total for channels 0...15;...
- Page 22 22 FLEX I/O Digital DC Output Modules General Specifications Attribute Value Indicators (field side indication) (1794-OB8) 8 yellow status indicators (1794-OB8EP) 8 yellow status indicators 8 red fault indicators (1794-OB16, 1794-OB16P) 16 yellow status indicators (1794-OB32P) 32 yellow status indicators External DC power supply voltage, nom 24V DC External DC power voltage range (1794-OB8, 1794-OB16, 1794-OB16P, 1794-OB32P)
- Page 23 FLEX I/O Digital DC Output Modules Environmental Specifications Attribute Value Operating temperature 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): (1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P) -20…55 °C (-4…131 °F) (1794-OB32P) 0…55 °C (32…131 °F) Temperature, nonoperating...
- Page 24 24 FLEX I/O Digital DC Output Modules Environmental Specifications Attribute Value EFT/B immunity (1794-OB8, 1794-OB16, 1794-OB32P) IEC 61000-4-4: ±2 kV @ 5 kHz on power ports ±2 kV @ 5 kHz on signal ports (1794-OB8EP, 1794-OB16P) IEC 61000-4-4: ±3 kV @ 5 kHz on power ports ±3 kV @ 5 kHz on signal ports Surge transient immunity IEC 61000-4-5:...
- Page 25 FLEX I/O Digital DC Output Modules Certifications Certifications (when Value product is marked) (1794-OB8, 1794-OB16 only) European Union 94/9/EC ATEX Directive, compliant with: EN 60079-0:2009; General Requirements EN 60079-15:2010; Potentially Explosive Atmospheres, Protection "n" LCIE 01ATEX6020X II 3 G Ex nA IIC T4 Gc EC 60079-0, 6th Edition IEC 60079-15, 4th Edition (1794-OB8EP, 1794-OB16 only)
- Page 26 26 FLEX I/O Digital DC Output Modules Derating Curve for 1794-OB16P 31.2 28.5 27.5 On-State Voltage (V DC) Ambient Temperature o C The area within the curve represents the safe operating range for the module under various conditions of user supplied 24V DC supply voltages and ambienttemperatures. = Normal mounting safe operating range, (includes = Other mounting positions (including inverted horizontal) safe operating Normal Mounting –...
- Page 27 FLEX I/O Digital DC Output Modules Notes: Publication 1794-IN094C-EN-P - July 2015...
- Page 28 RA-DU002, available at http://www.rockwellautomation.com/literature/. Allen-Bradley, Rockwell Automation, FLEX I/O, and TechConnect are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies. Publication 1794-IN094C-EN-P - July 2015 Supersedes Publication 1794-IN094B-EN-P - April 2004 Copyright ©...
Need help?
Do you have a question about the FLEX I/O 1794-OB8 and is the answer not in the manual?
Questions and answers