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Installation Instructions
Direct Communication Module
(Catalog Number 1747-DCM)
Inside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page
For More Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Hazardous Location Considerations . . . . . . . . . . . . . . . . . . . 4
Environments dangereux . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Module Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Publication 1747-IN005B-EN-P - March 2003
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Table of Contents
Related Manuals for Allen-Bradley 1747-DCM
Summary of Contents for Allen-Bradley 1747-DCM
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Page 1: Table Of Contents
Direct Communication Module (Catalog Number 1747-DCM) Inside ........page For More Information . - Page 2 Rockwell Automation 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-1.1, Safety Guidelines for the Application, Installation and Maintenance of Solid-State Control (available from your local Rockwell Automation office), describes some important differences between solid-state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication.
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Page 3: For More Information
Direct Communication Module For More Information For detailed information on planning and installing your system, see the following publications: Publication Number Direct Communication User Manual 1747-6.8 SLC 500 Modular Hardware Style User Manual 1747-UM011 SLC 500 Fixed Hardware Style User Manual 1747-6.21 RIO Scanner User Manual 1747-6.6... -
Page 4: Hazardous Location Considerations
Direct Communication Module Hazardous Location Considerations This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D, or non-hazardous locations only. The following WARNING applies to use in hazardous locations. EXPLOSION HAZARD WARNING • Substitution of components may impair suitability for Class I, Division 2. -
Page 5: System Overview
• an RIO scanner, catalog number 1771-SN or 1747-SN, on the RIO Communication Link The 1747-DCM can physically reside on the RIO Link with any other adapter. It is compatible with all RIO scanners. 1747-DCM Modules are connected in a daisy-chain configuration using Belden™... -
Page 6: Hardware Features
Direct Communication Module Extended Node Capability The 1747-DCM features extended node capability. Extended node capability allows you to have up to 32 adapters on the RIO link using an 82Ω termination resistor at both ends of the RIO link for all baud rates. -
Page 7: Module Configuration
DIP Switches DIP switches enable the 1747-DCM to properly interpret the RIO system addressing. The 1747-DCM has two banks of DIP switches mounted on its circuit board. Each bank contains eight switches. The default settings are shown below. Starting I/O Group Number... - Page 8 Direct Communication Module Settings for SW1-1 through SW1-6 Logical Chassis Number (Octal) Switch Number (SW1) 1747- PLC-2 PLC-3 PLC-5 PLC-5 PLC-5 PLC-5 PLC-5 /250 Publication 1747-IN005B-EN-P - March 2003...
- Page 9 Direct Communication Module Settings for SW1-1 through SW1-6 Logical Chassis Number (Octal) Switch Number (SW1) 1747- PLC-2 PLC-3 PLC-5 PLC-5 PLC-5 PLC-5 PLC-5 /250 Reserved Publication 1747-IN005B-EN-P - March 2003...
- Page 10 The starting I/O group number must be an even number from 0 to 6 (e.g. 0, 2, 4, or 6) and is dependent upon whether the 1747-DCM has been configured as a full, ¾, ½, or ¼ chassis. The first word transferred is always the status word for the 1747-DCM.
- Page 11 Program/Test/Fault mode. Status bits will not be cleared. Turn the switch to the ON position if you want the 1747-DCM to hold all input data bits in their last state if an RIO communication failure occurs or when the supervisory processor enters the Program/Test/Fault mode.
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Page 12: Installation And Removal
Chassis Size (SW2-5 and SW2-6) The logical chassis size allocates image space in the scanner for each 1747-DCMs I/O data. The 1747-DCM allows ¼, ½, ¾, and full chassis addressing. SW2 switches 5 and 6 define the chassis size, as shown below. - Page 13 Direct Communication Module Installation 1. Disconnect power. 2. Align the full-sized circuit board with the chassis card guides. The 1747-DCM must not be installed in slot 0. The first slot (slot 0) of the first chassis is reserved for the CPU.
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Page 14: Network Wiring
SIZE LAST RACK CLR ON FLT Connector DATA RATE LINE 1 _______ SHIELD ______ LINE 2 _______ 1747-DCM Line 1 - Blue 1747±DCM Direct Communication Shield - Shield Line 2 - Clear Module 1747-DCM Direct Communication Line 1 - Blue... -
Page 15: Troubleshooting
Normal State No action required. The 1747-DCM cannot cross logical chassis boundaries. For example, configuring the module for ½ logical chassis with starting group 6 causes a configuration error. Using the COMM LED (Green) If LED is: Cause:... -
Page 16: Specifications
Specifications Backplane Current Consumption 360 mA at 5V dc Operating Temperature 0°C to +60°C (+32°F to +140°F) Storage Temperature -40°C to +85°C (-40°F to +185°F) Humidity Rating 5% to 95% non-condensing Agency Certification (when product or packaging UL listed is marked) CSA certified Class 1, Division 2, Groups A, B, C, D certified CE compliant for all applicable directives.