Rockwell Automation 1785-LTx INST.INSTR CLASSIC PLC-5 User Manual
Installation instructions
Publication1785-5.12 May 1998
Classic PLCĆ5 Programmable
Controller Firmware Upgrade
(Catalog Numbers 1785-LT1, -LT2, -LT3, -LT4)
These instructions describe:
•
an important safety precaution involving static electricity
discharges
•
how to dissassemble the processor and replace firmware PROMs
Use these instructions with the Classic PLC-5 Hardware Installation
Manual, publication number 1786-6.6.1. For more information,
contact your Allen-Bradley service representative.
Printed circuit board components and PROM memory devices can be
damaged during routine handling and installation. Follow these
precautions to reduce static electricity discharges before you install
the processor
•
Handle the printed circuit boards and PROMs by the case or
carrier without touching the pins or the edge connector.
•
Use a static-free workstation.
•
Connect the static-free workstation to ground through a minimum
200K ohm resistance.
•
Wear a grounded, conductive wrist strap with a minimum 200K
ohm resistance.
•
Ground all tools before you begin to upgrade the firmware.
•
Control the relative humidity of the installation area – ideal
conditions are 40% to 60% relative humidity.
A-B
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