Rockwell Automation T3408 ICS Regent DC Digital Input Modules - Manual (Page 10)

DC Digital Input Modules (T3401, 02, and 08)
1 0
Industrial Control Services
Keying
The I/O chassis can be physically keyed to prevent accidental
damage caused by inserting a module into a slot wired for a
different module type. Figure 7 illustrates how the slot keys
are installed on the I/O chassis slot field wiring connectors.
The slot key positions for the DC digital input modules are
listed in Table 1.
Figure 7. Installing Slot Keys.