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1771-DBMEM2

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Allen Bradley | PLC-5 | 1771-DBMEM2 | Image

Allen Bradley | PLC-5 | 1771-DBMEM2 | Image Allen Bradley | PLC-5 | 1771-DBMEM2 - Wiring Diagram Image

SKU 2173245  UPC 0799705798335

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The 1771-DBMEM2 is a 32 KB EEPROM memory module from Allen Bradley. Although it is optional, the 1771-DBMEM2 is used with both a 1771-DB BASIC module and a 1746-BAS-T module in order to increase the user-accessible memory. The 1771-DB BASIC module interfaces the PLC-5 processor with the RS-232, RS-422, RS-485 devices, and the 1771 backplane. To install the 1771-DBMEM2 to either the 1771-DB module or the 1746-BAS-T module, remove the modules form the Input/Output chassis. This must be done when the power to the Input/Output chassis is turned off. Carefully dismantle the BASIC and BAS-T module to place to the memory slot inside.

 

Insert the 1771-DBMEM2 memory module into its slot; for the 1771-DB BASIC module, insert the memory module into the SKT1 slot. Reassemble the module and set the JW2 and JW3 accordingly. Use the JW2 jumper to select the PROM circuitry and the JW3 jumper to select the CPU speed, which will ensure that the 1771-DBMEM2 performs to its maximum. Install it back into the Input/Output chassis when the power is still turned off. The 1771-DBMEM2, as with all memory modules, is sensitive to electrostatic charges, which have the potential damage the module. To avoid this, make discharge yourself by holding onto a grounded object, or by using a wrist-strap grounding device. When discharging, avoid contact with the backplane connector pins. This may lead to the damage of the semiconductors or the module’s integrated circuitry. The 1771-DBMEM2 stores data in a hexadecimal format. The hex file transfer option is enabled by the BASIC development program; this file provides an easier way to transfer data from one module’s EEPROM to a different EEPROM in another module.

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