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 . .
Direct Communication Module Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products 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.
Direct Communication Module 3 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 SLC 500 Instruction Set Reference Manual 1747-RM001 Industrial Automation Wiring and Grounding Guidelines 1770-4.
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. WARNING ! EXPLOSION HAZARD • Substitution of components may impair suitability for Class I, Division 2. • Do not replace components or disconnect equipment unless power has been switched off. • Do not connect or disconnect components unless power has been switched off.
Direct Communication Module 5 System Overview The Direct Communication Module, catalog number 1747-DCM, connects any SLC 500 programmable controller with expansion chassis or SLC 500 Modular Programmable Controller to a supervisory Allen-Bradley programmable controller via the RIO Link, providing a distributed processing system. The 1747-DCM allows these supervisory processors to transfer data between one another.
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. IMPORTANT Extended node capability can only be used if the scanner and all adapters on the RIO link have extended node capability.
Direct Communication Module 7 Module Configuration DIP Switches Starting I/O Group Number O N Chassis Address 1 2 3 4 5 6 7 8 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.
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 1 SN /15 /25 /40 /60 /250 2 3 4 5 6 0 1 0 - - - - 0 ON 1 2 1 1 1 1 1 1 ON ON ON ON ON ON ON ON ON ON 2 3 2 2 2 2 2 2 OFF ON ON ON ON OFF 3 4 3 3 3 3 3 ON 3 ON ON ON ON OFF 5 4 4 4 OFF 4 4 ON ON ON OFF ON ON 6 5 5 7 6 6 5 5 5 ON ON ON OFF ON OFF 6 6 6 ON
Direct Communication Module 9 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 1 SN /15 /25 /40 /60 /250 77 77 2 3 4 5 6 44 OFF OFF ON OFF ON ON 45 OFF ON ON OFF ON OFF 46 OFF ON ON OFF OFF ON 47 OFF ON ON OFF OFF OFF 50 OFF ON OFF ON ON ON 51 OFF ON OFF ON ON OFF 52 OFF ON OFF ON OFF ON 53 OFF ON OFF ON OFF OFF 54 OFF ON OFF OFF ON ON 55 OFF ON OFF
Direct Communication Module Starting I/O Group Number (SW1-7 and SW1-8) 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. The table below shows the switch settings for the starting I/O group numbers.
Direct Communication Module 11 Clear on Fault (SW2-3) Clear On Fault SW2-3 Yes OFF No ON Turn the switch to the OFF position if you want the 1747-DCM to clear and hold clear all data bits in its input image table in the event of an RIO communication failure or when the supervisory processor enters the Program/Test/Fault mode. Status bits will not be cleared.
Direct Communication Module 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.
Direct Communication Module 13 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. 3. Slide the module into the chassis until the top and bottom latches are latched. 4. Attach the RIO link cable to the connector on the front of the module. 5. Insert the cable tie in the slots. 6.
Direct Communication Module Network Wiring A ½ Watt terminating resistor must be attached across line 1 and line 2 of the connectors at each end (scanner and last physical device) of the network. The size of the resistor depends upon the baud rate and extended node capability, as shown in the table below. Baud Rate Using Extended Node Capability Without Extended Node Capability Terminating Resistor Size Maximum Cable Distance (Belden 9463) 57.
Direct Communication Module 15 Troubleshooting Using the FAULT LED (Red) If LED is: Cause: Corrective Action: On Internal Fault Cycle power to the I/O chassis containing the 1747-DCM. Replace the 1747-DCM if red LED remains lit after power-up. Flashing Configuration Error Check that the DIP switch settings are correct. Make sure that I/O group Normal State No action required. Off (1) and chassis size settings are compatible.(1) Also see that the setting for chassis address is correct.
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 is marked) UL listed CSA certified Class 1, Division 2, Groups A, B, C, D certified CE compliant for all applicable directives. C-Tick marked for all applicable acts.
