Rockwell Automation T7404 ICS Regent+Plus AC Digital Input Module 110VAC - Manual (Page 7)

(T7404) AC Digital Input Module
P D - 7 0 1 3 M a r - 0 6
7
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 5 illustrates how the slot keys
are installed on the I/O chassis slot field wiring connectors.
The slot key positions for the AC digital input module are
listed in Table 1.
Figure 5. Installing Slot Keys.