National Instruments NI 9219 - Manual (Page 4)

NI 9219 Operating Instructions 4 ni.com
Figure 1 shows the NI 9972 connector backshell.
Figure 1. NI 9972 Connector Backshell
Safety Guidelines for Hazardous Locations
The NI 9219 is suitable for use in Class I, Division 2, Groups A, B,
C, D, T4 hazardous locations; Class I, Zone 2, AEx nC IIC T4
hazardous locations; and nonhazardous locations only. Follow
these guidelines if you are installing the NI 9219 in a potentially
explosive environment. Not following these guidelines may result
in serious injury or death.
Caution Do not disconnect I/O-side wires or connectors
unless power has been switched off or the area is known
to be nonhazardous.