Rockwell Automation 1756-LSC8XIB8I ControlLogix Low-speed Counter Module - Manual (Page 67)

Rockwell Automation Publication 1756-UM536A-EN-P - April 2012 67
Electronic Keying Appendix A
EXAMPLE In the following scenario, Disable Keying allows I/O communication.
The module configuration is for a 1756-IA16 digital input module. The
physical module is a 1756-IB16 digital input module. In this case,
communication is allowed because the two digital modules share common
data formats.
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input Module
Catalog Number = 1756-IA16
Major Revision = 2
Minor Revision = 1
Physical Module
Vendor = Allen-Bradley
Product Type = Digital Input Module
Catalog Number = 1756-IB16
Major Revision = 3
Minor Revision = 2
Communication is allowed.