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NI 9919 Installation Guide and Specifications
Grounding the NI 9919
NI requires that you connect the NI 9919 to earth ground (protective earth) and ground the
chassis and power supply.
Connecting Safety Ground
NI requires that you connect the NI 9919 to earth ground (protective earth) using the following
steps:
SAFETY GROUND CAUTION
Connecting Safety Ground (Protective Earth)
The NI 9919 must have a safety ground (protective earth), which is connected by the
installer to the premise safety ground system for safe operation. The installer must
use a green or green/yellow wire for this purpose. The safety ground method shall be
reliable and meet applicable safety codes.
Figure 11.
Safety Ground Terminal
1.
Attach a ring lug to a green or green/yellow wire that is 2.58 mm
2
(10 AWG) or larger.
2.
Remove the grounding nut from the safety ground terminal on the rear panel of the NI 9919.
3.
Attach the ring lug to the safety ground terminal.
4.
Tighten the grounding nut to 1.3 N · m (11.5 lb · in.) of torque.
5.
Attach the other end of the green or green/yellow wire to the grounding electrode system
of your facility using a method appropriate for the application.
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Safety ground terminal
1
