Publication 1764-UM001B-EN-P - April 2002
2-22 Installing Your Controller
Compact I/O
Attach and Lock Module (Module-to-Controller or Module-to-Module)
A Compact I/O module can be attached to the controller or an
adjacent I/O module before or after mounting to the panel or DIN rail.
The module can be detached and replaced while the system is
mounted to a panel or DIN rail.
ATTENTION
!
Remove power before removing or inserting an I/O
module. When you remove or insert a module with
power applied, an electrical arc may occur. An
electrical arc can cause personal injury or property
damage by:
• sending an erroneous signal to your system’s field
devices, causing the controller to fault
• causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on
both the module and its mating connector. Worn
contacts may create electrical resistance, reducing
product reliability.
ATTENTION
!
When attaching I/O modules, it is very important that
they are securely locked together to ensure proper
electrical connection.
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