Publication17855.13 April 1996
Enhanced PLC5
Programmable Controller
Firmware Upgrade
(Catalog Numbers 1785-L11B, -L20B, -L30B,
-L40B, -L40L, -L60B, -L60L, -L80B)
These instructions describe:
• an important safety precaution involving static electricity
discharges
• how to upgrade the processor firmware
For more information about PLC-5 processors, see the Enhanced and
Ethernet PLC-5 User Manual, publication number 1786-6.5.12. For
more information, contact your Allen-Bradley service representative.
Printed circuit board components and Programmable Read-only
Memory (PROM) devices can be damaged during routine handling
and installation. Follow these precautions to reduce static electricity
discharges before you upgrade the processor firmware.
• 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.
AB
Installation Instructions
Using These Instructions
Before You Install ...
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