Allen-Bradley FLEX Ex Analog I/O Modules (Cat. No.
Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards.
Preface Using This Manual Why Read this Manual This manual shows you how to use your FLEX Ex analog modules with the ControlNet Ex products and ControlNet network. The manual helps you install, program, and troubleshoot your module. Who Should Read this Manual You must be able to program and operate a ControlNet Ex product and ControlNet network to make efficient use of a FLEX Ex module. About the Vocabulary In this manual, we refer to the: • 1797-IE8 as the “input module”.
P-2 Using This Manual For Additional Information For additional information on FLEX Ex systems and modules, refer to the following documents, Publications Catalog Number In Summary Publication 1797-6.5.1 - April 1999 Description Installation Instructions User Manual 1797 Series FLEX Ex Product Data 1797-2.1 (Product data) 1797 Series FLEX Ex System Overview 1797-2.2 (System overview) 1797 Series ControlNet Ex System Cable Guide 1797-6.2.
Table of Contents Chapter 1 About the FLEX Ex Analog Modules What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . What the FLEX Ex Analog I/O Modules Do . . . . . . . . . . . . . . . . How FLEX Ex Analog Modules Communicate with Programmable Controllers . . . . . . . . . . . . . . Events following Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . Physical Features of Your Analog I/O Module . . . . . . . . . . . . . . Indicators . . . . . . . . . . . . . . . . . .
ii Chapter 3 How to Install Your FLEX Ex Analog Modules What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Before You Install Your Analog Module . . . . . . . . . . . . . . . . . . . 3-1 Compliance to European Union Directives . . . . . . . . . . . . . . . . . 3-2 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Ex Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Installation in Zone 1 .
iii Chapter 5 Calibrating Your Module What This Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 When and How to Calibrate Your FLEX Ex Analog I/O Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Using Calibration Module Command Words . . . . . . . . . . . . . . . . 5-2 MODULE Command Word . . . . . . . . . . . . . . . . . . . . . . . . . .
iv AppendixA Specifications 1797-IE8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I/O Entity Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1797-OE8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . I/O Entity Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A-2 A-3 A-4 Appendix B Programming the FLEX Ex I/O Modules Using RIO What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 About the FLEX Ex Analog Modules What this Chapter Contains Read this chapter to familiarize yourself with the 1797-IE8 and 1797-OE8 analog modules. For information on: What the FLEX Ex Analog I/O Modules Do See page: What the FLEX Ex Analog I/O Modules Do 1-1 How FLEX Ex Analog Modules Communicate with Programmable Controllers 1-2 Physical Features of Your Analog I/O Module 1-3 Chapter Summary 1-6 The 1797-IE8 module accepts up to 8 analog inputs.
1-2 About the FLEX Ex Analog Modules How FLEX Ex Analog Modules Communicate with Programmable Controllers FLEX Ex analog I/O modules provide best utility when used with ControlNet Ex products on the ControlNet network. Data connections are established between the I/O module and an Allen-Bradley programmable controller to transfer information between the two at a scheduled rate. Input module information is then automatically made available in the PLC data table through the data connection.
About the FLEX Ex Analog Modules Physical Features of Your Analog I/O Module 1-3 The module label identifies the keyswitch position, wiring and module type. Use the removable label to note individual designations per your application. Indicators Indicators are provided to identify input or output fault conditions, and to show when power is applied to the module. For example, the 1797-IE8 module is shown below.
1-4 About the FLEX Ex Analog Modules Data Format Alarm Example In this example, the normal active data range is 4-20mA. The alarms are generated in three overlapping bands. PHYSICAL INPUT SIGNAL RANGE 0mA 4mA 20mA underrange 22mA overrange remote fault remote fault local fault local fault -25.00% -12.50% programmable in 20 0.1mA steps by Error Level 0.1mA Steps parameter 0.00% 100.00% Remote Transmitter Error Up/Down parameter determines which of these is active programmable in 20 0.
About the FLEX Ex Analog Modules 1-5 Remote Fault Alarm The Remote Fault Alarm is primarily intended for use with remote transmitter loops. For example, the remote transmitter may be measuring temperature and converting it to a standard mA signal. In such a loop, though, the input module cannot determine the state of the loop on the far side of the transmitter.
1-6 About the FLEX Ex Analog Modules Programming the Remote Fault Alarm For the Remote Fault alarm, you must program the threshold in 0.1mA steps at any level on the high or low end of input signal range. The Remote Fault alarm activates if your I/O module receives input signal values of: • 100.63% (20.1mA) to 111.88% (21.9mA) on the high end of input signal range RU • -0.63% (3.9mA) to -11.88% (2.
Chapter 2 Understanding Configurable FLEX Ex Analog Module Features What this Chapter Contains Read this chapter to familiarize yourself with configurable features on the 1797-IE8 and 1797-OE8 analog modules.
2-2 Understanding Configurable FLEX Ex Analog Module Features Important: You must use the I/O configuration portion of your PLC programming software to select and configure these features. This manual assumes familiarity with the programming software. A brief description of each module feature is provided here. For more information on your programming software, see the software user manual.
Understanding Configurable FLEX Ex Analog Module Features 2-3 High Low Error Level High Low Error level sets the high and low signal levels at which your input module will indicate a signal fault. This feature works in conjunction with the Remote Transmitter Error Up or Down. If the Remote Fault Alarm feature is enabled and a remote fault occurs, the module will detect and report the fault, depending on how the High Low Error level is configured.
2-4 Understanding Configurable FLEX Ex Analog Module Features Data Format You must choose a module data format in your user program. See Table 2.C on page 2-4 for an explanation of each bit. Formats 8, 9, 10 and 15 are not used. If they are selected for a channel quad, a configuration fault will occur and will be reported as Diagnostic Data “2”. All data for that channel quad will be set to zero (0). When using Table 2.
Understanding Configurable FLEX Ex Analog Module Features 2-5 Table 2.C 1797-IE8 Data Formats Data Format Format Resolution Input Range 5 4-20mA as 0.16% of % 4-20mA 2-22mA 6 P$ DV √ 4-22mA 0.17% of 4-20mA Module Data Processing datatable = 10,000 ( input-4 16 ) √ input-4 16 IF . . . Square_Root_Threshold datatable = 10,000 < 10,000 Data Table Value (interpretation) Count per mA Error Steps -1250 - +11250 (2’s complement) (-12.50% +112.50%) 625 with error steps 0-10607 (0-106.
2-6 Understanding Configurable FLEX Ex Analog Module Features Data Formats and Error Ranges The graphic below shows the data formats and error ranges for your FLEX Ex analog I/O modules. PHYSICAL INPUT SIGNAL RANGE 0mA 20mA normal signal range 22mA overrange remote fault Format 0 Format 1 Format 2 Format 3 20.00mA 100.00% 100.00% 65,535 0.00mA 0.00% 0.00% 0 0mA programmable in 20 0.
Understanding Configurable FLEX Ex Analog Module Features Selecting a 1797-OE8 FLEX Ex Analog Output Module’s Operating Features 2-7 All features of the 1797-OE8 analog input module are independently configurable in two four-channel groups (channel 0-3 & channel 4-7). Important: The default slection value for all parameters is 0. Output Enable The Output Enable feature provides user control of the FLEX Ex I/O module’s output channels.
2-8 Understanding Configurable FLEX Ex Analog Module Features Latch Retry Mode Latch Mode determines channel operation under wire off or lead break fault conditions. This feature controls the operation of two channel groups, channels 0-3 and channels 4-7. Channel detection occurs on a continuous basis. If a fault is detected, the channel fault alarm is set. If Latch Mode is enabled when a fault occurs, the fault will remain latched in its fault state until a Global Reset (see below) is issued.
Understanding Configurable FLEX Ex Analog Module Features 2-9 Analog Fault State The Analog Fault State feature determines how your I/O module reacts to faults when a channel is used in analog mode. After a fault condition occurs, the module may got to minimum value, maximum value, hold last state or 50% of range.
2-10 Understanding Configurable FLEX Ex Analog Module Features Data Format You must choose a module data format in your user program. See Table 2.D on page 2-11 for an explanation of each bit. Data Formats 2, 5, 6, 8, 9, 10, 12 and 15 are not assigned. When choosing a data format, remember the following: • If a non-assigned Analog Data Format is selected, the module sets Diagnostic Data to “2” for configuration failure and puts affected channels affected in the corresponding fault state.
Understanding Configurable FLEX Ex Analog Module Features 2-11 Table 2.D 1797-OE8 Data Formats Data Format Format Resolution Full Output Range 0 mA as 0-20mA 0.1% of 0-20mA 0-22mA 1 % as 0-20mA 0.2% of 0-20mA 0-22mA 2 0-20mA 3 unsigned integer as 0-20mA 0.03% of 0-20mA 0-20mA 4 mA as 4-20mA 0.1% of 4-20mA 2-22mA 5 4-20mA 4-20mA not assigned 6 4-20mA 4-20mA not assigned 7 unsigned integer as 4-20mA 8 0-20mA 0-20mA not assigned 9 0-20mA 0-20mA not assigned 0-22mA 0.
2-12 Understanding Configurable FLEX Ex Analog Module Features Table 2.D 1797-OE8 Data Formats Data Format Format Resolution Full Output Range Module Data Processing 10 0-20mA 0-20mA 11 D/A count 0.28% of as 0-20mA 0-20mA 0-22mA 12 4-20mA 13 % as 4-20mA 0.16% of 4-20mA 3-21mA 14 % as 4-20mA 0.
Understanding Configurable FLEX Ex Analog Module Features Understanding Image Table Mapping and Bit/Word Descriptions 2-13 Bit Descriptions Use the table below to understand bits used in image table mapping and bit/word descriptions. Complete definitions of these feature documented below can be found in Chapter 2.
2-14 Understanding Configurable FLEX Ex Analog Module Features Analog Input Module (1797-IE8) Image Table Mapping Input Map (Read Words) → Word ↓ Bit 0 1 2 3 4 5 6 7 8 9 10 11 15 14 13 12 11 10 09 08 07 06 05 04 03 Channel 0 Input Data Channel 1 Input Data Channel 2 Input Data Channel 3 Input Data Channel 4 Input Data Channel 5 Input Data Channel 6 Input Data Channel 7 Input Data Ovr Ovr Und Und Alm Alm Alm Alm ch ch ch ch 1 0 7 6 Rm Rm Lo Lo Flt Flt Flt Flt ch ch ch ch 1 0 7 6 Und Alm
Understanding Configurable FLEX Ex Analog Module Features 2-15 Bit/Word Description for the Analog Input Module (1797-IE8) Fault Mode - Write Words 0 and 1 Word 0 Bit 00 Word 1 Bit 00 Fault enable for channels 0-3 Fault enable for channels 4-7 Where:0 = disabled 1 = enable with wire-off and overload or short circuit “Add-On” Filter Selections - Write Words 0 and 1 Word 0 1 Bits 07 07 0 0 0 0 1 1 1 1 06 06 0 0 1 1 0 0 1 1 05 05 0 1 0 1 0 1 0 1 Description Channels 0-3 Channels 4-7 Hardware filtering
2-16 Understanding Configurable FLEX Ex Analog Module Features Bits 1 0 1 1 1 1 1 1 1 1 1 0 0 1 1 Description 0-22mA = A/D count, w/fixed error 3.6-21mA = NAMUR NE 43, w/fixed error 3-21mA = -6.25 to 106.28% w/fixed error 2-22mA = -12.5 to 112.5% w/fixed error Not assigned 1 0 1 0 1 Error Level 0.1mA Steps Word 0 Word 1 Data Format 2-22mA -12.5 to 112.
Understanding Configurable FLEX Ex Analog Module Features 2-17 Bit/Word Descriptions for the Analog Output Module (1797-OE8) Output Map (Write Words) Bit → 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Word ↓ 0 Out Enbl Glbl Rst RESERVED Dig Out ch7 Dig Out ch6 1 Channel 0 Output Data 2 Channel 1 Output Data 3 Channel 2 Output Data 4 Channel 3 Output Data 5 Channel 4 Output Data 6 Channel 5 Output Data 7 Channel 6 Output Data 8 Channel 7 Output Data 9 Lo Flt Md
2-18 Understanding Configurable FLEX Ex Analog Module Features Data Format Control Data Format 0 0 0 Range Resolution 0 0-20mA 0 1 0-20mA 0.1% of 0-20mA 0.2% of 0-20mA 0 0 0 0 0 0 1 1 0 1 0-20mA 0-20mA 0 1 0 0 4-20mA 0 0 0 1 1 1 0 1 1 1 0 1 4-20mA 4-20mA 4-20mA 1 1 1 1 0 0 0 0 0 0 1 1 0 1 0 1 0-20mA 0-20mA 0-20mA 0-20mA 1 1 1 1 0 0 0 1 4-20mA 4-20mA 1 1 1 0 4-20mA 1 1 1 1 4-20mA Chapter Summary Publication 1797-6.5.1 - April 1999 0.03% of 0-20mA 0.
Chapter 3 How to Install Your FLEX Ex Analog Modules What this Chapter Contains Read this chapter to install the 1797-IE8 and 1797-OE8 analog modules.
3-2 How to Install Your FLEX Ex Analog Modules Compliance to European Union Directives If this product has the CE mark, it is approved for installation within the European and EEA regions. It has been designed and tested to meet the following directives.
How to Install Your FLEX Ex Analog Modules Installation in Zone 1 This module must not be exposed to the environment. Provide a suitable metal enclosure. Electrostatic Charge Removal and Insertion Under Power 3-3 ATTENTION: This module cannot be used in an intrinsically safe environment after it has been exposed to non-intrinsically safe signals. Protect the system against electrostatic charge. Post a sign near this module: Attention! Avoid electrostatic charge.
3-4 How to Install Your FLEX Ex Analog Modules Installing the Module Installation of the analog module consists of: • mounting the terminal base unit • installing the analog I/O module into the terminal base unit • installing the connecting wiring to the terminal base unit If you are installing your module into a terminal base unit that is already installed, proceed to “Mounting the Analog Modules on the Terminal Base” on page 9.
How to Install Your FLEX Ex Analog Modules 3-5 4. Position the terminal base over the 35 x 7.5mm DIN rail A (A-B pt. no. 199-DR1). A A Position terminal base at a slight angle and hooked over the top of the DIN rail A. 41106 41107 Slide the terminal base over tight against the adapter (or proceeding terminal base). Make sure the hook on the terminal base slides under the edge of the adapter (or proceeding terminal base) and the flexbus connector is fully retracted.
3-6 How to Install Your FLEX Ex Analog Modules 5. Rotate the terminal base onto the DIN rail with the top of the rail hooked under the lip on the rear of the terminal base. Use caution to make sure that the female flexbus connector does not strike any of the pins in the mating male connector. 41108 Press down on the terminal base unit to lock the terminal base on the DIN rail.
How to Install Your FLEX Ex Analog Modules 3-7 Panel/Wall Mounting Installation on a wall or panel consists of: • laying out the drilling points on the wall or panel • drilling the pilot holes for the mounting screws • mounting the adapter mounting plate • installing the terminal base units and securing them to the wall or panel If you are installing your module into a terminal base unit that is already installed, proceed to Mounting the 1797-IE8 Analog Input or 1797-OE8 Analog Output Module on the Termin
3-8 How to Install Your FLEX Ex Analog Modules To install the mounting plate on a wall or panel: 1. Lay out the required points on the wall/panel as shown in the drilling dimension drawing. Drilling Dimensions for Panel/Wall Mounting of FLEX Ex I/O 1.4 (35.5) 2.3 (58.5) 1.4 (35.5) 2.3 (58.5) 1.4 (35.5) 1.6 (40.5) .61 (15.6) .3 (8) .83 (21) 2.0 (50) Inches (Millimeters) ATTENTION: Be careful of metal chips when drilling cable mounting holes.
How to Install Your FLEX Ex Analog Modules 3-9 6. Position the terminal base unit up against the adapter and push the female bus connector into the adapter. 7. Secure to the wall with two #6 self-tapping screws. 8. Repeat for each remaining terminal base unit. Mounting the 1797-IE8 Analog Input or 1797-OE8 Analog Output Module on the Terminal Base Unit The 1797-IE8 and 1797-OE8 modules mount on a 1797-TB3 or TB3S intrinsically safe terminal base unit. 1.
3-10 How to Install Your FLEX Ex Analog 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 unit. 4. Position the module (4) with its alignment bar (5) aligned with the groove (6) on the terminal base. 5. Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism (7) is locked into the module. 6.
How to Install Your FLEX Ex Analog Modules Connecting Wiring to the FLEX Ex I/O Analog Modules 3-11 Inputs/Outputs Each 1797-IE8 input can be operated from an analog field device signal, and each 1797-OE8 output channel can operate an analog field device. Do not apply any non-intrinsically safe signals to these modules. Important: When using an intrinsically safe electrical apparatus according to EN50020, the European Community directives and regulations must be followed.
3-12 How to Install Your FLEX Ex Analog Modules For Two-Wire Transmitter Devices 1. Connect the individual input wiring to (+) terminals (0, 4, 8, 12) on the 0-15 row (A) and on the 16-33 row (B) (terminals 17, 21, 25, 29) as indicated in the table below. 2. Connect the associated input to the corresponding (sig) terminal (1, 5, 9, 13) on the 0-15 row (A), and on the 16-33 row (B) (terminals 18, 22, 26, 30) for each input as indicated in the table below. 3.
How to Install Your FLEX Ex Analog Modules 3-13 Connections for the 1797-OE8 Module +V power -V supply + Bus flexbus uC 4-20mA valve - 4-20mA actuator 41441 1797-OE8 Module 0 Row A 1 + ch0 16 2 3 4 5 + ch1 6 7 8 9 + ch2 10 11 12 13 14 15 + ch3 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Row B + ch4 34 + ch5 + ch6 + ch7 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Row C +V -V +V -V 41440 No connections allowed to terminals 2, 3, 6, 7, 10, 11, 14, 15, 19, 20, 23,
3-14 How to Install Your FLEX Ex Analog Modules Wiring connections for the 1797-OE8 Module Output Output + Output – Output Output + Output – Output 0 A-0 A-1 Output 4 B-17 B-18 Output 1 A-4 A-5 Output 5 B-21 B-22 Output 2 A-8 A-9 Output 6 B-25 B-26 Output 3 A-12 A-13 Output 7 B-29 B-30 +V Terminals 34 and 50 -V Terminals 35 and 51 Terminals 16, 33, 40, 41, 42, 43, 44 and 45 are connected to chassis ground.
Chapter 4 Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network What this Chapter Contains Read this chapter to familiarize yourself with input, output and configuration files for analog I/O modules on ControlNet.
4-2 Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network Using Programming Software in Your FLEX Ex Application When using FLEX Ex I/O analog modules, you must perform I/O mapping and configure the ControlNet network before generating configuration data for your I/O modules. For example, you may use RSNetWorx™ to connect FLEX Ex I/O modules to a ControlNet processor or scanner through a FLEX Ex ControlNet Ex adapter (cat. no. 1797-ACNR15).
Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network Communication Over the FLEX Ex Backplane 4-3 One 1797-ACNR15/B ControlNet Ex adapter can interface up to eight terminal base units with installed FLEX Ex modules, forming a FLEX Ex system of up to eight slots. The adapter communicates to other network system components (typically one or more controllers or scanners, and/or programming terminals) over the ControlNet network.
4-4 Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network Unscheduled messaging on a ControlNet network is non-deterministic. Your application and your configuration–number of nodes, application program, NUT, amount of scheduled bandwidth used, etc.–determine how much time there is for unscheduled messaging. Module I/O Mapping The I/O map for a module is divided into read words and write words.
Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network 4-5 Adapter Status Word The status word consists of: • I/O module fault bits – 1 status bit for each slot Additionally, in the case of a PLC-5 controller, it adds: • node address changed – 1 bit (created by PLC-5 controller) • I/O status – 1 bit (created by PLC-5 controller) The following FLEX Ex adapter status word for a PLC-5 controller results.
4-6 Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network Possible causes for an I/O Module Fault are: • transmission errors on the FLEX Ex backplane • a failed module • a module removed from its terminal base • incorrect module inserted in a slot position • the slot is empty • the slot contains a non-discrete module Fault State Data The ControlNet Ex adapter provides storage for alternate module output data during communication faults or processor idle state.
Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network 4-7 Communication Fault Behavior You can configure the adapter response to a communication fault for each I/O module in its system.
4-8 Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network Input Data Behavior upon Module Removal I/O module input data sent by the adapter upon module removal is configurable. The adapter can: • reset the module input data sent by the adapter to zero (reset) • leave the module input data sent by the adapter in the last state before module removal (hold last state) Chapter Summary Publication 1797-6.5.
Chapter 5 Calibrating Your Module What This Chapter Contains Use this chapter to calibrate the FLEX Ex analog I/O modules. For information on: When and How to Calibrate Your FLEX Ex Analog I/O Module Tools and Equipment Using Calibration Module Command Words Calibrating the 1797-IE8 Module Calibrating the 1797-OE8 Module Chapter Summary See page: 5-1 5-2 5-2 5-6 5-8 5-10 Important: This chapter provides a detailed method to perform module calibration with individual commands.
5-2 Calibrating Your Module Use one of the following general methods to calibrate your module: • Use intrinsically safe equipment to calibrate the module. • Use factory trained personnel under controlled conditions to calibrate the modules with non-intrinsically safe equipment to maintain your module’s intrinsic safety certification. ATTENTION: With the second method, extreme care must be exercised by the calibration personnel to avoid compromising the intrinsically safe characteristics or your modules.
Calibrating Your Module 5-3 Typical MODULE Calibration Command Word The controller sends a MODULE calibration command word over the network, onto the flexbus and to the module.
5-4 Calibrating Your Module 6 Max Scale Calibration by Channel 36 0-7 0 input = 21mA 0-7 1-15 not used 8-15 0-15 not used 0 0 zero min scale and max scale coefficients 0 1-15 not used 1 0 input = 1mA 1 1-15 not used 2 0 input = 21mA 2 1-15 not used 3-15 0-15 not used Calibration all Channels General Calibration all Channels Min Scale Calibration all Channels Max Scale Calibration all Channels For example, based on the table below, command 4 0 0 asks for zeroing the min
Calibrating Your Module 5-5 General MODULE Response Word Once the I/O module echoes the command and data it will not treat the continued presence of the same calibration command as a signal to perform that command again. If the user wants to perform the same calibration again, a “No Operation” command must be sent from the controller to the module first. The following tables show typical command sequences.
5-6 Calibrating Your Module Calibrating the 1797-IE8 Module To calibrate the 1797–IE8 module use the following steps: 1. Attach the precision current source(s) to the module.
Calibrating Your Module 5-7 9. Await an echo message from the module announcing that it has performed Max Scale Calibration. 10.After all channels are calibrated, send a message to the module instructing it to go to Commands Idle state. The following table shows the calibration MODULE command definitions.
5-8 Calibrating Your Module Calibrating the 1797-OE8 Module To calibrate the 1797–OE8 module use the following general method: 1. Attach the precision current meters(s) to the module.
Calibrating Your Module 5-9 7. Record the value indicated by the channel(s) precision current meter into the appropriate channel’s(s’) data table location. 8. Send a message to the module instructing it to Accept Value in Channel Data Word as Min Scale Calibration on the channel(s). 9. Await an echo message from the module announcing that it has performed Accept Value in Channel(s) Data Word(s) as Min Scale Calibration on the channel(s). 10.
5-10 Calibrating Your Module The following table shows the calibration MODULE command definitions.
Chapter 6 Applying FLEX Ex Analog I/O Modules What this Chapter Contains Read this chapter to learn how to use entity parameters when electrically interconnecting your FLEX Ex analog I/O module in a hazardous area.
6-2 Applying FLEX Ex Analog I/O Modules Define the Area Classification Before you can determine what components will make up your FLEX Ex system, you must define the area in which that system will operate. You must determine the following: • classification method • hazard • temperature rating Decide Classification Method Your application location will usually decide whether the classification method is Zone or Class/Division, but the system designer may make this determination.
Applying FLEX Ex Analog I/O Modules 6-3 Important: As not all protection methods are applicable for all locations, consult local certifying agencies to determine acceptable protection methods for your application. Match Field Devices and I/O Modules You must match field devices and I/O modules for your application to function properly.
6-4 Applying FLEX Ex Analog I/O Modules Loop Functionality Verification The functional characteristics will be checked first. The figure below shows the general situation which must be analyzed for proper loop function. On the left are the module components of the voltage source to run the loop and its internal source resistance. In the center is the cable. It represents a loss with regard to its resistance. Cable resistance is a function of cable length.
Applying FLEX Ex Analog I/O Modules 6-5 Intrinsic Safety Entity Verification Next we must determine if the pressure to current analog transmitter and the Flex Ex analog input module are compatible from an IS perspective. We will make this determination for a IIC gas application. The figure below shows an extraction of pertinent information from the figures on pages 6-3. cable length = 10m + 91Ω 17V P/I transmitter EEx ia IIC T4 Ui=30V Ii=165mA Ci=22.5nF Li=730uH Ci<10pF/m Li<0.5uH/m R<0.
6-6 Applying FLEX Ex Analog I/O Modules I/O The 1797-IE8 and 1797-OE8 modules comply fully to and provide simple entity parameters. These modules can directly interface with a wide variety of intrinsically safe controls and instrumentation. Because all field device power is supplied directly from the I/O module, no extra wiring or power sources are needed in a hazardous area.
Applying FLEX Ex Analog I/O Modules 6-7 Assign the next module to another output as before. When all four power supply outputs are utilized, add another power supply to the system, see the figure below.
6-8 Applying FLEX Ex Analog I/O Modules Power Supply Considerations When applying power, consider the certain characteristics of the wire connecting the power supply output to a module’s power input. The wire cannot exhibit more than: • 0.1Ω of resistance (+V and -V combined) • 800nF of capacitance • 10µF of inductance Typically, these restrictions will yield wiring lengths of not more than 3.5m or 5.8m (1.5mm2 and 2.5mm2 wire respectively) without the use of special wiring or wiring methods.
Chapter 7 Troubleshooting the FLEX Ex Analog I/O Modules What this Chapter Contains Read this chapter to troubleshoot your I/O module. For information on: See page: Status Indicators 7-1 Repair 7-2 Chapter Summary 7-2 1797-IE8 Module Status Indicators The 1797-IE8 module has one power indicator that is on when power is applied to the module and one status indicator for each input.
7-2 Troubleshooting the FLEX Ex Analog I/O Modules 1797-OE8 Module The 1797-OE8 module has one power that is on when power is applied to the module and one status indicator for each input.
Appendix A Specifications 1797-IE8 Specifications Number of Inputs 8 single-ended, non-isolated IS Input Type EEx ia IIB/IIC T4, Class I, II, III Division 1 Group A-G IS Module Type EEx ib IIB/IIC T4, Class I Division 1 Group A-D Resolution 16 bits Transfer Characteristics Accuracy at 20°C (68°F) Temperature Drift 0.1% of output signal range 0.
A-2 Specifications Dimensions 46mm x 94mm x 75mm (1.8in x 3.7in x 2.
Specifications A-3 Source output plus measurement input (+ to -) for ch 0 to ch 7 (terminals: 0-2; 4-6; 8-10; 12-14; 17-19; 21-23; 25-27; 29-31) Uo = 23.7V Io = 93.5mA Po = 555mW Protection Group Allowed Allowed Capacitance Inductance EEx ia IIB 560nF 10mH IIC 66nF 2.5mH IIB 320nF 10mH IIC 60nF 2mH If concentrated EEx ia capacitance and/ or inductance are available, use the following values.
A-4 Specifications Thermal Dissipation 18.4 BTU/hr Module Location Cat. No. 1797-TB3 or -TB3S Terminal Base Unit Conductors Wire Size 12 gauge (4mm2) stranded maximum 1.2mm (3/64in) insulation maximum Dimensions 46 x 94 x 75mm (1.8 x 3.7 x 2.
Appendix B Programming the FLEX Ex I/O Modules Using RIO What this Chapter Contains Read this appendix to program the 1797-IE8 and 1797-OE8 analog modules. Enter Block Transfer Instructions The FLEX Ex analog I/O modules communicate with the PLC processor through bidirectional block transfers. This is the sequential operation of both read and write block transfer instructions. Before you configure the module, you need to enter block transfer instructions into your ladder logic.
B-2 Programming the FLEX Ex I/O Modules Using RIO Using the PLC-5C Processor Block transfer instructions with the PLC-5C processor use a control file and a data file. The block transfer control file contains the data table section for module location, the address of the block transfer data file and other related data. The block transfer data file stores data that you want transferred to the module (when programming a BTW) or from the module (when programming a BTR).
Index A $ODUPV 1797-IE8 module 1-3 local fault 1-3 1-6 overrange 1-3 1-4 programming remote fault 1-6 remote fault 1-3 1-5 underrange 1-3 1-4 using fault mode with local fault alarm 2-2 using fault mode with remote fault alarm 2-2 using remote fault alarm to determine alarm levels 1-5 $QDORJ 'LJLWDO 6WDWH 1797-OE8 module 2-8 $QDORJ )DXOW 6WDWH 1797-OE8 module 2-9 $UHD &ODVVLILFDWLRQ Defining 6-2 Hazard 6-2 Method 6-2 Temperature rating 6-2 B %LW 'HVFULSWLRQV 1797-IE8 module 2-15 1797-OE8 module 2-17 Ima
I-2 Index K .H\VZLWFK Using on the terminal base unit 3-9 L /DWFK 5HWU\ 0RGH 1797-OE8 module 2-8 /RFDO )DXOW 0RGH 1797-OE8 module 2-7 /RRS )XQFWLRQDOLW\ 9HULILFDWLRQ 6-4 M 0RGXOH , 2 0DSSLQJ 4-4 0RGXOH ,QVWDOODWLRQ 3-9 0RGXOH 6WDWXV ,QGLFDWRUV 0RXQWLQJ .LW cat. no.
Allen-Bradley Publication Problem Report If you find a problem with our documentation, please complete and return this form. Pub. Name FLEX Ex Analog I/O Modules User Manual Cat. No. 1797-IE8, -OE8 Check Problem(s) Type: Pub. No. 1797-6.5.1 Pub. Date January 1999 Part No.
PLEASE FASTEN HERE (DO NOT STAPLE) PLEASE FOLD HERE NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL FIRST-CLASS MAIL PERMIT NO.
Attention: Avoid electrostatic charge. Attention: Avoid electrostatic charge. Attention: Avoid electrostatic charge. Attention: Avoid electrostatic charge. Attention: Avoid electrostatic charge.
Publication 1797-6.5.1 - April 1999 PN 955126-45 © (1999) Rockwell International Corporation. Printed in the U.S.A.
