Quick Links. Download this manual. Allen Bradley. Table of Contents. Digital sourcing input and sinking output modules 20 pages.

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The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability to include intellectual property liability for actual use based upon the examples shown in this publication. Allen-Bradley publication SGI—1. Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Allen—Bradley Company, Inc.

Throughout this manual we make notes to alert you to possible injury to people or damage to equipment under specific circumstances.

Attention helps you: Identify a hazard. Avoid the hazard. Recognize the consequences. Important: Identifies information that is especially important for successful application and understanding of the product. Important: We recommend you frequently backup your application programs on appropriate storage medium to avoid possible data loss. Summary of Changes This publication contains new and revised information not included in the previous version. In addition, range selection bits have been revised to include an Off condition.

Change Bars The areas in this manual which are different from previous editions are marked with change bars as shown to the right of this paragraph to indicate the addition of new or revised information. Publication 6. New Information. Addition of DeviceNet Mapping. Revised Information. Change Bars. Purpose of this Manual. Manual Organization. For Additional Information. Chapter Objectives. Features of your Analog Modules. Chapter Summary.

Compliance to European Union Directives. EMC Directive. Low Voltage Directive. Power Requirements. Installing the Module. Connecting Wiring for the Analog Modules.

Block Transfer Programming. PLC 3 Programming. Figure 3. PLC 5 Programming. Analog Data Format. Configuring Your Analog Module. Range Selection. Safe State Value Selection. Data Format. Reading Data From Your Module. Mapping Data for the Analog Modules. About DeviceNet Manager. Adapter Input Status Word. Mapping Data into the Image Table. Two's Complement Binary. Scaling Example. Support Services. Technical Support. Engineering and Field Services. Technical Training. Repair and Exchange Services.

The manual helps you install, program and troubleshoot your modules. In particular, you must know how to program block transfers. We assume that you know how to do this in this manual. If you do not, refer to the appropriate programming and operations manual before you attempt to program your modules.

Audience Vocabulary In this manual, we refer to: — the analog input or analog output module as the "input module" or ''output module" — the Programmable Controller as the "controller" Manual Organization This manual is divided into five chapters.

The following chart lists each chapter with its corresponding title and a brief overview of the topics covered in that chapter.

Block transfer programming moves input from the module's memory to a designated area in the processor data table, and output data words from a designated area in the processor data table to the module's memory. Block transfer programming also moves configuration words from the processor data table to module memory. These instructions let the adapter obtain input values and status from the module, and let you send output values and establish the module's mode of operation. Figure 1.

A removable label provides space for writing individual designations per your application. Position the keyswitch on the terminal base As described under: Power Requirements, page Installing the Module, page ! If power is not applied, the module position will appear to the adapter as an empty slot in your chassis. If the adapter does not recognize your module after installation is completed, cycle power to the adapter.

It has been designed and tested to meet the following directives. For specific information required by EN , see the appropriate sections in this publication, as well as the following Allen-Bradley publications: Industrial Automation Wiring and Grounding Guidelines For Noise Immunity, publication Make certain that the current draw does not exceed 10A. Separate power connections may be necessary. Analog module wiring separate from discrete wiring. Total current draw through any base unit must not be greater than 10A Publication 6.

Interruption of the flexbus can result in unintended operation or machine motion. Remove the cover plug if used in the male connector of the unit to which you are connecting this terminal base unit. Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this terminal base unit will mate correctly. Position the terminal base on the 35 x 7. Make certain that the female flexbus connector C is fully retracted into the base unit.

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.

Press the terminal base down onto the DIN rail until flush. The locking tab D will snap into position and lock the terminal base to the DIN rail. If the terminal base does not lock in place, use a screwdriver or similar device to move the locking tab down, press the terminal base flush with the DIN rail and release the locking tab to lock the base in place.

Gently push the female flexbus connector C into the adjacent terminal base or adapter female connector to complete the flexbus connections. Repeat the above steps to install the next terminal base. Use the mounting kit Cat. Drill the necessary holes for the 6 self-tapping mounting screws. Mount the mounting plate 1 for the adapter module using two 6 self-tapping screws 18 included for mounting up to 8 modules and the adapter. Important: Make certain that the mounting plate is properly grounded to the panel.

More 4. Hold the adapter 2 at a slight angle and engage the top of the mounting plate in the indention on the rear of the adapter module. Press the adapter down flush with the panel until the locking lever locks. Position the terminal base unit up against the adapter and push the female bus connector into the adapter. Secure to the wall with two 6 self-tapping screws. Repeat for each remaining terminal base unit. Note: The adapter is capable of addressing eight modules. Do not exceed a maximum of eight terminal base units in your system.

Rotate the keyswitch 1 on the terminal base unit 2 clockwise to the position required for the specific type of analog module. You cannot install the module unless the connector is fully extended. Make sure that the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base unit. Position the module 4 with its alignment bar 5 aligned with the groove 6 on the terminal base.


Allen-Bradley 1794-IE8 Series B User Manual




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