Rockwell Automation Allen-Bradley 1790D-N0C2 Manual Download Page 3

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Rockwell Automation Publication 1790-UM001B-EN-P - April 2021

Table of Contents

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Chapter 1

Overview

How to Use Analog I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
General Diagnostic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter 2

Installation and Wiring

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
General Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Reduce Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Protect the Circuit Board from Contamination . . . . . . . . . . . . . . . . . 14

Install the CompactBlock LDX I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Set the Node Address on the Base Block. . . . . . . . . . . . . . . . . . . . . . . .  14
Mount the Base Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
Mount the Optional Expansion Blocks . . . . . . . . . . . . . . . . . . . . . . . . .  15
Connect the DeviceNet Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16

I/O System Wiring Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Chapter 3

Module Data, Status, and Channel
Configuration for Analog Input
Modules

Analog Input Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
Analog Input Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
Analog Input Data File With Discrete Input Expansion Module . .  26

Analog Input Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Summary of Contents for Allen-Bradley 1790D-N0C2

Page 1: ...CompactBlock LDX I O Analog Modules Catalog Numbers 1790D N4CO 1790D TN4CO 1790D TN4V0 1790D N0C2 1790D TN0C2 1790D TN0V2 1790P TN4C0 1790P TN0C2 User Manual Original Instructions ...

Page 2: ... 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 when necessary we use notes to make you aware of safety considerations Labels may also be on or inside the equipment to provide specific p...

Page 3: ...e Base Block 14 Mount the Base Block 14 Mount the Optional Expansion Blocks 15 Connect the DeviceNet Cable 16 I O System Wiring Guidelines 17 General 17 Input Modules 17 Output Modules 17 Effect of Transducer Sensor and Cable Length Impedance on Voltage Input Accuracy 17 Effect of Device and Cable Output Impedance on Output Module Accuracy 19 Wiring the Modules 20 1790D N4C0 Analog 4 Input Base D ...

Page 4: ...ion 42 Safety Circuits 42 Module Operation vs Channel Operation 42 Power up Diagnostics 42 Module Status 42 Network Status 43 Channel Diagnostics 43 Out of Range Detection Input Modules Only 43 Open Circuit Detection Input Module Only 43 Analog Input Module Error Definition Table 43 Module Errors 44 Channel Status Indicator Operation 44 Contacting Rockwell Automation 45 Appendix A Install Wire and...

Page 5: ... 1790P TN4C0 Data Structure 53 Analog Input Image 53 1790P TNOC2 Data Structure 54 Analog Output Image 54 Output Fault and Idle States 54 Configuring PROFIBUS Analog Modules 55 Configure Analog Modules with SST PROFIBUS Configuration Tool 55 Download the Configuration 58 Index 61 ...

Page 6: ...6 Rockwell Automation Publication 1790 UM001B EN P April 2021 Table of Contents Notes ...

Page 7: ...ed installation instructions for 1790D TN4C0 1790D TN0C2 and 1790D TN4V0 DeviceNet Analog Base D shell CompactBlock LDX I O Installation Instructions publication 1790 IN004 Provides detailed installation instructions for 1790D N4C0 1790D N0C2 DeviceNet Media Design Installation Guide publication DNET UM072 Provides guidance on the required components of the cable system and how to design for and i...

Page 8: ...8 Rockwell Automation Publication 1790 UM001B EN P April 2021 Notes ...

Page 9: ... a typical use of analog data In this application the processor controls the amount of fluid in a holding tank by adjusting the valve opening The valve is initially open 100 As the fluid level in the tank approaches the preset point the processor modifies the output to close the valve 90 80 and so on continuously adjusting the valve to maintain the fluid level General Description The analog input ...

Page 10: ...ne via the controller s programming software In addition some controllers support configuration via the user program Figure 1 shows the CompactBlock LDX I O analog module hardware features Figure 1 Hardware Features General Diagnostic Features The CompactBlock LDX I O modules contain diagnostic features that can help you identify the source of problems that may occur during power up or during Tabl...

Page 11: ...us indicator is turned on After power up checks are complete the module waits for valid channel configuration data If an invalid configuration is detected the module generates a configuration error Once a channel is properly configured and enabled it begins the analog to digital or digital to analog conversion process Module Operation Input Module The input module s input circuitry consists of fou...

Page 12: ...cribed in Module Data Status and Channel Configuration for Analog Output Modules on page 33 Output Module The output module uses a digital to analog D A converter to read the digital output data from the network and convert it to an analog output signal Figure 3 shows a block diagram of the circuitry Figure 3 Output Module Circuitry Block Diagram Isolation Control Data Microcontroller Optocouplers...

Page 13: ...rence Analog inputs and outputs are highly susceptible to electrical noise Electrical noise coupled to the analog inputs reduces the performance accuracy of the module Group your modules in the enclosure to minimize adverse effects from radiated electrical noise and heat Consider the following conditions when selecting a location for the analog module Position the module away from sources of elect...

Page 14: ...he switches on the front of the block The two switches are most significant digit MSD and least significant digit LSD The switches can be set from 00 to 63 The rotary switches are read at block power up only Switch settings from 64 to 99 cause the block to use the last valid node address stored internally Figure 4 Node Address Settings The node address may also be set through RSNetWorx for DeviceN...

Page 15: ... lever while pressing the block against the rail 3 Push up on the locking lever to secure the block to the rail when block is flush against the rail Mount the Optional Expansion Blocks Mount the expansion block by connecting it to a previously installed CompactBlock LDX I O base or expansion block Beginning with the base block you can mount your expansion blocks horizontally or vertically horizont...

Page 16: ...e block If applicable use the locking screws on the connector to fasten it to the block WARNING If you connect or disconnect the DeviceNet cable with power applied to this module or any device on the network 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 EXPANSION UNIT Compact...

Page 17: ... I O module end 1 Input Modules If multiple power supplies are used with analog inputs the power supply commons must be connected together The module does not provide loop power for analog inputs Use a power supply that matches the input transmitter specifications Output Modules Voltage outputs CH0 and CH1 of the 1790D TNOV2 modules are referenced to COM Load resistance for a voltage output channe...

Page 18: ...or Belden 8761 two conductor shielded cable Rc 16 1000 ft Rs 0 ideal source As input source impedance Rs and or resistance DC of the cable Rc get larger system accuracy decreases If you determine that the inaccuracy error is significant implement the following equation in the control program to compensate for the added inaccuracy error due to the impedance of the source and cable Table 3 Effect of...

Page 19: ...load Impedance of the load device Vs Voltage at the output of 1790D TNOV2 Vload Measured potential at the load device Ai Percent added inaccuracy in a voltage based system due to source and cable impedance For example for Belden 8761 two conductor shielded cable and a 1790D TNOV2 module Rc 16 1000 ft Rs 0 5 Table 4 Effect of Output Impedance and Cable Length on Accuracy Length of Cable m DC resist...

Page 20: ... normal conditions this drain wire and shield junction must be connected to earth ground through a panel or DIN rail mounting screw at the analog I O module end Keep the length of the drain wire as short as possible In environments where high frequency noise is present ground the cable shields to earth at the module and via a 0 1 μF capacitor at the sensor end for analog inputs and at the load end...

Page 21: ... N4C0 Module 1790D TN4C0 1790D TN4V0 Analog 4 Input Base Module Wiring Table 6 lists the module pin descriptions Figure 10 and Figure 11 show how to wire each module Table 5 1790D N4C0 Module Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 Description NC NC NC NC NC CH3 NC CH2 NC CH1 Pin Number 11 12 13 14 15 16 17 18 19 20 Description NC CH0 NC NC NC NC 24V 24V 24V NC Pin Number 21 22 23 24 25 2...

Page 22: ...NC NC NC NC NC 24V Field Power 24V DC GND Field Power GND Table 6 1790D TN4C0 and 1790D TN4V0 Module Pin Description Continued Pin Number 1 2 3 4 5 6 7 8 9 10 mA COM CH0 24V DC GND 24V V COM CH0 24V DC GND 24V Table 7 1790D N0C2 Module Pin Description Pin Number 1 2 3 4 5 6 7 8 9 10 Description NC NC NC NC NC NC NC NC NC CH1 Pin Number 11 12 13 14 15 16 17 18 19 20 Description NC CH0 NC NC NC NC 2...

Page 23: ... descriptions Figure 13 shows how to wire each module Figure 13 Example of Input Wiring to the 1790D TN0C2 and 1790D TN0V2 Module L COM CH0 24V DC GND 24V Table 8 1790D TN0C2 and 1790D TN0V2 Module Pin Description Pin Number 1 2 3 4 5 6 7 8 9 10 Description 24V GND CH0 COM CH1 COM NC NC NC NC Pin Number 11 12 13 14 15 16 17 18 19 20 Description NC NC NC NC NC NC NC NC NC NC 24V Field Power 24V DC ...

Page 24: ...24 Rockwell Automation Publication 1790 UM001B EN P April 2021 Chapter 2 Installation and Wiring Notes ...

Page 25: ...oportional Input words 5 and 6 contain input data for two optional discrete input expansion modules 1790D N4C0 and 1790D TN4C0 Configuration Each analog current input can be configured for either the 4 20 mA or 0 20 mA range See Configure Analog Modules with RSNetWorx on page 29 for instructions Analog Input Data File The input data table allows you to access analog input module and data for use i...

Page 26: ... 0 bit 01 corresponds to input channel 1 and so on When set 1 indicates No field power Open wire 4 20 mA current input only Under range 4 20 mA current input only Recoverable module fault whole channel to be set Unrecoverable module fault whole channel to be set Bits 04 15 Not used Set to 0 Table 11 1790D N4C0 1790D TN4C0 1790D TN4V0 Input Data File with 8 Bit Discrete Expansion Module Word Bit Po...

Page 27: ...sed Table 13 1790D N4C0 1790D TN4C0 1790D TN4V0 Input Data File with 16 Bit Discrete Expansion Module Word Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 Not Used Analog Input Data Channel 0 1 Not Used Analog Input Data Channel 1 2 Not Used Analog Input Data Channel 2 3 Not Used Analog Input Data Channel 3 4 Not Used S3 S2 S1 S0 5 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Table 1...

Page 28: ...rd 2 Bits 00 11 Channel 2 input data Bits 12 15 Not used Set to 0 Read Word 3 Bits 00 11 Channel 3 input data Bits 12 15 Not used Set to 0 Read Word 4 Bits 00 03 Status bits for individual channels Bit 00 corresponds to input channel 0 bit 01 corresponds to input channel 1 and so on When set 1 indicates No field power Open wire 4 20 mA current input only Under range 4 20 mA current input only Reco...

Page 29: ...onfigure analog modules follow these steps 1 Open RSNetWorx for DeviceNet 2 Add an analog input module for example 1790D N4C0 to the network as shown in Figure 14 Read Word 1 Bits 00 11 Channel 1 input data Bits 12 15 Not used Set to 0 Read Word 2 Bits 00 11 Channel 2 input data Bits 12 15 Not used Set to 0 Read Word 3 Bits 00 11 Channel 3 input data Bits 12 15 Not used Set to 0 Read Word 4 Bits 0...

Page 30: ... the configuration and existing module parameters are shown A dialog box similar to Figure 15 displays Figure 15 General Module Properties 4 Click the Module Configuration tab Analog input modules have a configuration dialog box similar to the dialog box shown in Figure 16 for the 1790D N4C0 module A Use the signs to open the following path DeviceNet Rockwell Automation Allen Bradley Rockwell Auto...

Page 31: ...les Figure 16 Module Configuration Tab Use the Parameters tab to change module configuration Figure 17 shows how to change an AMP range selection Figure 17 Parameters Tab 1 Use the pull down menu to change range selection 2 Click OK after making all configuration changes A Click the catalog number B Click Properties Pull down menu Click OK ...

Page 32: ...UM001B EN P April 2021 Chapter 3 Module Data Status and Channel Configuration for Analog Input Modules The Module Configuration dialog box displays 3 Click Download to save your configuration 4 Click OK after making all configuration changes ...

Page 33: ...ructure of the output data file is shown Analog Output Data File With Discrete Output Expansion Module Table 22 shows the structure for an analog base module with one of the following 8 output modules 1790 8BV8BX 1790 T8BV8BX discrete expansion module 1790 8BV8VX 1790 T8BV8VX discrete expansion module 1790 TOA8X discrete expansion module 1790 T0W8X discrete expansion module Table 20 1790D N0C2 179...

Page 34: ...D TN0C2 1790D TN0V2 Output Data File with 8 Bit Discrete Expansion Module Word Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 Not Used Analog Output Data Channel 0 1 Not Used Analog Output Data Channel 1 2 Not Used D7 D6 D5 D4 D3 D2 D1 D0 Table 23 Word Bit Descriptions Word Decimal Bit Description Write Word 0 Bits 00 11 Channel 0 output data Bits 12 15 Not used Set to 0 Write Word 1 Bits 00...

Page 35: ...0 11 Channel 0 output data Bits 12 15 Not used Set to 0 Write Word 1 Bits 00 11 Channel 1 output data Bits 12 15 Not used Set to 0 Write Word 2 Bits 00 15 First discrete output expansion data Write Word 3 Bits 00 07 Second discrete output expansion data Bits 08 15 Not used Set to 0 Table 28 1790D N4C0 1790D TN4C0 1790D TN4V0 Output Data File with 32 Bit Discrete Expansion Module Word Bit Position ...

Page 36: ... Configure the Analog Output Module RSNetWorx allows you to identify the network and configure the I O modules with easy to use Electronic Data Sheets EDS To download EDS files for use in configuration go to rok auto pcdc EDS files for blocks with matching catalog numbers for D shell and removable terminal block versions are the same The website or in RSNetWorx for DeviceNet there may be only one ...

Page 37: ...et network If you are online upload the configuration and existing module parameters are shown A dialog box similar to Figure 18 displays Figure 18 General Module Properties 4 Click the Module Configuration tab Analog input modules have a configuration dialog box similar to Figure 19 for the 1790D N0C2 module A Use the signs to open the following path DeviceNet Rockwell Automation Allen Bradley Ro...

Page 38: ...tion Use the Parameters tab to change module configuration For example Figure 20 shows how to change the Autobaud selection Figure 20 Parameters Tab 1 Use the pull down menu to change range selection 2 Click OK after making all configuration changes The screen returns to Module Configuration displays A Click the catalog number B Click Properties Pull down menu Click OK ...

Page 39: ...n Publication 1790 UM001B EN P April 2021 39 Chapter 4 Module Data Status and Channel Configuration for Analog Output Modules 3 Click Download to save your configuration 4 Click OK after making all configuration changes ...

Page 40: ...40 Rockwell Automation Publication 1790 UM001B EN P April 2021 Chapter 4 Module Data Status and Channel Configuration for Analog Output Modules Notes ...

Page 41: ...e green MOD and NET status indicator lights on the analog module are illuminated it indicates that power is applied to the module and the module is communicating on the network Activating Devices When Troubleshooting When troubleshooting never reach into the machine to actuate a device Unexpected machine motion could occur Stand Clear of the Machine When troubleshooting any system problem have all...

Page 42: ...d and removes power to the machine Never alter these circuits to defeat their function Serious injury or machine damage could result Module Operation vs Channel Operation The module performs operations at two levels module level power up configuration and communication with a controller channel level data conversion and over or underrange detection Internal diagnostics are performed at both levels...

Page 43: ...4 Open Circuit Detection Input Module Only The module performs an open circuit test on all channels that are configured for 4 20 mA inputs Whenever an open circuit condition occurs the status bit for that channel is set in input data word 4 Possible causes of an open circuit include the sensing device may be broken a wire may be loose or cut the sensing device may not be installed on the configure...

Page 44: ...n Range Overrange Open Circuit Short Circuit No Field Power 4 20 mA 4 mA Set Not set 20 mA Not set Set Set Set 0 20 mA 0 mA Not set Not set 20 mA Not set Not set Not set Set 0 10V DC 0V DC Not set Not set 10V Not set Not set Not set Set Table 37 Analog Input Modules 1790D TN4C0 Status Description Flashing green red Power up Off Offline Red Online and no field power Red DeviceNet connection and no ...

Page 45: ... information available when you call a clear statement of the problem including a description of what the system is actually doing Note the status indicator state also note input and output image words for the module a list of remedies you have already tried processor type and firmware number See the label on the processor hardware types in the system including all I O modules fault code if the pr...

Page 46: ...46 Rockwell Automation Publication 1790 UM001B EN P April 2021 Chapter 5 Module Diagnostics and Troubleshooting Notes ...

Page 47: ...Noise Most applications require installation in an industrial enclosure to reduce the effects of electrical interference Analog inputs and outputs are highly susceptible to electrical noise Electrical noise coupled to the analog inputs reduces the performance accuracy of the module Table 39 Analog I O Channel Power PROFIBUS power Supply voltage 24V DC nom Voltage range 19 2 28 8V DC Power dissipat...

Page 48: ...or the environment The interior of the enclosure should be kept clean and the enclosure door should be kept closed whenever possible Install the CompactBlock LDX I O Block Follow these steps to install the block 1 Set the Station Address on the Base Block 2 Mount the Base Block 3 Connect the PROFIBUS DP Terminal Connector 4 Connect Power to the Block Set the Station Address on the Base Block To se...

Page 49: ...l 3 Push up on the locking lever to secure the block to the rail when block is flush against the rail Mount the Optional Expansion Blocks Mount the expansion block by connecting it to a previously installed CompactBlock LDX I O base or expansion block Beginning with the base block you can mount your expansion blocks either horizontally or vertically horizontally left to right add expansion blocks ...

Page 50: ...h it to the base block as shown in Figure 22 Use the locking screws on the connector to fasten it to the base block Horizontal mounting Vertical mounting The longer expansion cable 1790 15CMCBL allows up to 7 cm 2 75 in of space between blocks WARNING If you connect or disconnect the PROFIBUS cable with power applied to this module or any device on the network an electrical arc can occur This coul...

Page 51: ...ints To ensure optimum accuracy limit overall cable impedance by keeping your cable as short as possible Locate the I O system as close to your sensors or actuators as your application permits Use Belden 8761 or equivalent shielded wire Keep shield connection to ground as short as possible Under normal conditions the drain wire and shield junction must be connected to earth ground via a panel or D...

Page 52: ...crew at the analog I O module end Keep the length of the drain wire as short as possible In environments where high frequency noise is present ground the cable shields to earth at the module and via a 0 1 μF capacitor at the sensor end for analog inputs and at the load end for analog outputs 4 At the other end of the cable cut the drain wire and foil shield back to the cable 5 Connect the signal w...

Page 53: ... 24 1790P TN4C0 Output Wiring Diagram Table 41 1790P TN4C0 Input Wiring Pin Number 1 3 5 7 9 11 13 15 17 19 Description 24V 1 1 24V Field power 24V DC CH0 CH1 CH2 CH3 NC NC NC NC NC Pin Number 2 4 6 8 10 12 14 16 18 20 Description GND 2 2 GND Field power Ground COM COM COM COM NC NC NC NC NC mA COM CH0 24V DC GND 24V Table 42 1790P TN0C2 Output Wiring Pin Number 1 3 5 7 9 11 13 15 17 19 Descriptio...

Page 54: ...2 bit resolution is used over the entire span of the input full scale range as shown in Table 43 The input data files are the same as those shown for the 1790D TN4CO See Analog Input Data File on page 25 for more information 1790P TNOC2 Data Structure Analog Output Image The output image file represents data words Output words 0 and 1 hold the output data that represents the value of the analog ou...

Page 55: ...ease notes from the Product Compatibility and Download Center at rok auto pcdc To read how to install the GSD file for your module use the SST PROFIBUS configuration tool documentation such as online help The next section shows how to configure your analog module with the SST PROFIBUS configuration tool Configure Analog Modules with SST PROFIBUS Configuration Tool The following configuration examp...

Page 56: ... the General tab on the Module Properties dialog as shown in Figure 25 Change any necessary information and either click to another tab click OK A If necessary use the search option to see a list of stations on the network B Select the station C Right click to see the menu D Choose the appropriate GSD file and the module appears on the network as shown A Right click the module to see the menu B Se...

Page 57: ...dditional modules as shown The following screen appears to add modules Up to two expansion modules may be added to analog base modules 8 Set the I O type This screen also shows the data size information A Make sure that the station number is correct B Click other tabs or click OK when finished on this screen A Click the Modules tab B Click Add A Choose the module B Click OK ...

Page 58: ...al communication cable is connected between the PC com port and the scanner serial port 2 Verify that the processor is in Program mode 3 Use the SST PROFIBUS configuration tool to connect to the master A Click the SLC Addresses tab B Choose the Input This example uses the I Type input A Click the Ext Prms tab B Use the pull down menu to change the Watchdog Time Base C Use the pull down menu to cha...

Page 59: ...o retain your configuration Any configuration mismatches are displayed in the software as shown 5 Load configuration to the master 6 If the scanner is online the software prompts you to load the configuration Choose YES The master status changes to the Configured Program mode Click OK to retain your configuration This example shows a mismatch in the master configuration A Right click the master to...

Page 60: ...1B EN P April 2021 Appendix A Install Wire and Configure PROFIBUS Modules 7 Change the processor to Run mode In addition to steady green indicator lights on the module you should see the dialog box shown This master is in Configured Program mode ...

Page 61: ...lt condition at power up 11 H heat considerations 13 I installation 13 16 heat and noise considerations 13 O open circuit detection 43 operation system 11 out of range detection 43 P power up diagnostics 42 power up sequence 11 program alteration 42 S safety circuits 42 system operation 11 T troubleshooting safety considerations 41 W wiring 13 input module 21 input terminal layout 21 22 23 modules...

Page 62: ...62 Rockwell Automation Publication 1790 UM001B EN P April 2021 Index Notes ...

Page 63: ...Rockwell Automation Publication 1790 UM001B EN P April 2021 63 CompactBlock LDX I O Analog Modules User Manual ...

Page 64: ... auto knowledgebase Local Technical Support Phone Numbers Locate the telephone number for your country rok auto phonesupport Literature Library Find installation instructions manuals brochures and technical data publications rok auto literature Product Compatibility and Download Center PCDC Download firmware associated files such as AOP EDS and DTM and access product release notes rok auto pcdc At...

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