National Instruments NI 9472 - Manual (Page 4)

NI 9472/9474 4 ni.com
and circuits connected to the module are properly
insulated from human contact. You must use the NI 9932
connector backshell kit to ensure that the terminals are
not accessible.
Figure 1 shows the NI 9932 connector backshell.
Note You can use the NI 9932 connector backshell only
with the NI 9472/9474 with screw terminal.
Figure 1. NI 9932 Connector Backshell