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Allen-Bradley ControlLogix - Specifying Electronic Keying

Allen-Bradley ControlLogix
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1756-6.5.3 - December 1999
Appendix
C
Electronic Keying
Specifying Electronic Keying
You specify electronic keying to ensure that a module being inserted or
configured is of the proper type and firmware revision.
!
ATTENTION: Be extremely cautious when you
disable electronic keying. If used incorrectly, this
option can lead to personal injury or death, property
damage, or economic loss.
Keying Description
“least” disable keying No attributes of the software or hardware are
required to match.
“moderate”
compatible module The module must be compatible with the software
configuration. These characteristics must match:
module type
catalog number
major revision
The minor revision must be equal to or greater than
the one specified in the software.
“most”
exact match The module must match the software configuration
exactly. These characteristics must match:
module type
catalog number
major revision
minor revision

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