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The 1785-ME64 is a memory device module used in PLC-5 enhanced program controllers. This EEPROM module is a product from Allen-Bradley/Rockwell Automation. Other versions of the 1785-M series include the 1785-ME16, -ME32, and –M100 series, and they’re classified in terms of their storage capacities. The “ME64” indicates that it is an EEPROM module with the storage size of 64K words. The 1785-ME64 is a compatible program controllers, such as the 1785-L80B, -L60B, -L60L, -L40B, and the -L40L. The EEPROM module is compatible with the 6200 PLC-5 software versions 4.1 and later. Since it is an EEPROM used as a program backup, the 1785-ME64 has a reprogrammable ROM that can be modified, erased, and rewritten repeatedly when it is connected to an application with a voltage supply that is higher than normal. The memory module features a write-protection jumper and an expansion port for the control coprocessor. The write-protection jumper is attached to the 1785-ME64 to write a program to the memory module. The Allen-Bradley 1785-ME64 EEPROM memory module can be used at high altitudes of up to 2000 meters. Its light weight of 70.875 grams (2.5 ounce), its operating temperature range of the of 0 to 60 degree Celsius, and its storage temperature range of -40 to 85 degree Celsius make the Allen-Bradley 1785-ME64 memory module suitable for different types of conditions. However, make sure that there is enough space around the terminal inside the enclosure and sufficient air ventilation, because the 1785-ME64 emits excessive heat and has 95% relative humidity without condensation.
The memory module has passed vibration tests and shock tests, and has been certified by the Canadian Standards Association, European Union EMC Directive, and Underwriter Laboratories. The 1785-ME64 has a vibration of 2 grams at 10 to 500 Hertz, while its operating and non-operating shock of 30 grams at 11 milliseconds duration and 50 grams at 11 milliseconds duration, respectively. To install the Allen-Bradley 1785-ME64 EEPROM module, switch of the power to the input/output chassis and remove the processor. Also, make sure that backplane switches 6 and 7 should be set according to the product manual, to avoid any data loss or errors. Keeping the keying pins downward, insert the 1785-ME64 memory module into the processor. Push the memory module firmly enough to hear the snapping sound confirming that the connector pins are snapped into the processor’s connector. Safely, insert the processor into the input/output chassis. After transferring and executing the program, switch of the power and repeat the removal process of the processor. Pry out the 1785-ME64 memory module from the processor and remove its write-protection jumper using needle-nose pliers. Repeat the above mentioned process to reinstall the memory module and the processor.
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