WHITE BROWN DA 918 Manual do Utilizador descarregar pdf (Página 34)

NI cDAQ-918x/919x User Manual

NI cDAQ Chassis Features

The cDAQ chassis features a chassis grounding screw, LEDs, reset button, Ethernet connector,

and power connector. The NI cDAQ-9188 chassis also features two PFI BNC connectors. The

NI cDAQ-9191 chassis also features an antenna and antenna jack. Refer to Figure 1-1, 1-2,

or 1-3 for locations of the cDAQ chassis features.

Chassis Grounding Screw

Caution To ensure the specified EMC performance, the cDAQ chassis must be

connected to the grounding electrode system of your facility using the chassis ground

terminal.

The wire should be 1.31 mm

(16 AWG) or larger solid copper wire with a maximum length of

1.5 m (5 ft). Attach the wire to the earth ground of the facility’s power system. For more

information about earth ground connections, refer to the KnowledgeBase document, Grounding

for Test and Measurement Devices, by going to

ni.com/info and entering the Info Code

emcground.

Note If you use shielded cabling to connect to a C Series I/O module with a plastic

connector, you must attach the cable shield to the chassis grounding terminal using

1.31 mm

(16 AWG) or larger wire. Use shorter wire for better EMC performance.

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WHITE BROWN DA 918 Manual do Utilizador Página 34