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National Instruments Corporation
7
NI 9925 Installation Guide
Building an IP Rated RJ45 Ethernet Cable
The Ethernet field termination connector kit is included in the NI 9925 kit for creating a custom
IP rated RJ45 Ethernet cable. Refer to the
SCPFE Wiring/Assembly Instructions
document
included in the field termination connector kit for instructions about how to build an IP rated
Ethernet cable.
Caution
Only use the connectors provided with the NI 9925 to build your cables.
Note
When the external Ethernet connector on the NI 9925 is not in use, cover the
connector with the Ethernet end cap.
Building IP Rated I/O Cables
The two-piece clamp system, consisting of a cable clamp and a grommet, allows prefabricated
cables to route I/O out of the NI 9925. When the proper grommet is selected, the clamp system
meets a minimum IP rating of IP54. Grommets with two holes route two cables at once. Blank
grommets are also provided, allowing for custom cable configuration. For more information
about IP ratings, refer to the
Understanding IP Ratings
section.
Caution
Only use the connectors provided with the NI 9925 to build your cables.
Note
To ensure that the NI cDAQ-9181/9191 chassis meets specified requirements,
use one of the clamps to route ground outside of the NI 9925 outdoor IP enclosure.
Caution
For I/O openings on the NI 9925 that are not in use, use the blank grommets
in the cable clamps to seal the openings and maintain an IP54 rating.
To use the clamp system, complete the following steps:
1.
Choose the appropriately sized grommet for the cable diameter width. Blank grommets are
provided for use with custom cable sizes and to seal unused I/O openings.
2.
Place the grommet around the cable(s) leaving enough length to go through the enclosure
hole and into the C Series I/O module, as shown in Figure 7.
3.
Open the cable clamp. You may need to pry it open with a 0.125 in. flathead screwdriver.
4.
Press the grommet containing the cable into the open cable clamp.
5.
Press the two halves of the cable clamp together until they lock together.
6.
Place the gasket over the clamp thread, thread the cable(s) through the enclosure hole, and
insert the clamp into the enclosure hole.
7.
Secure the clamp system with the provided nut.
