National Instruments NI 9229 - Manual (Page 4)

NI 9229/9239 4 ni.com
Caution When module terminals are hazardous voltage
LIVE (>42.4V
pk
/60 VDC), you must ensure that devices
and circuits connected to the module are properly
insulated from human contact. You must use the NI 9971
connector backshell kit to ensure that the terminals are
not accessible.
Figure 1 shows the NI 9971 connector backshell.
Figure 1. NI 9971 Connector Backshell