National Instruments PXI-1042HVDC Manuals

INSTALLATION GUIDE NI PXI-1042HVDC DC Cable Kit The PXI-1042HVDC DC cable is designed to connect the PXI-1042HVDC chassis to a DC power source. The cable consists of a DC power connector, 18 feet of 10 AWG cable, and a high heat, impact resistant, water tight fuse holder with a 20 A fuse installed. For maximum DC power source protection, the fuse is located as close to the DC power source as is practical. The user must install the appropriate connectors required to connect the cable to their DC power source. Caution Observe proper polarity when connecting to a DC power source. Refer to drawing CD_192057-01 for more detail. Fuse Replacement Caution Disconnect the cable from the PXI-1042HVDC chassis and any power source before replacing the fuse or connecting the fuse holder to the DC cable. Complete the following steps to replace the fuse: 1. Unscrew the two halves of the fuse holder body by turning one half in a counter-clockwise direction. 2. Replace the fuse with an F20A, 500 VDC/600 VAC, 1.5 in. × .41 in. (10 mm × 38 mm) Midget, fast-acting fuse. 3. Align the mating tabs on one half of the fuse holder body with the slots on the other half, and screw the two halves back together in a clockwise direction. Hand tighten only. Reducing Cable Length National Instruments recommends using the cable at its designed length. If it is necessary to shorten the cable for a particular application, the following guidelines should be observed. Caution Do not leave the fuse holder out of the cable assembly.