National Instruments 8-Channel Solid-State Relay (SSR) Digital Output NI 9485 - Manual (Page 4)

NI 9485 Operating Instructions 4 ni.com
Figure 1 shows the NI 9939 connector backshell.
Figure 1. NI 9939 Connector Backshell
Safety Guidelines for Hazardous Locations
The NI 9485 is suitable for use in Class I, Division 2, Groups A, B,
C, D, T4 hazardous locations; Class I, Zone 2, AEx nA II T4 and
Ex nA II T4 hazardous locations; and nonhazardous locations only.
Follow these guidelines if you are installing the NI 9485 in a
potentially explosive environment. Not following these guidelines
may result in serious injury or death.