National Instruments usb device 628x 用户手册

USB-622x/625x/628x OEM devices have a replaceable T 2A 250V 
(5

× 20 mm) fuse that protects the device from overcurrent through the 

power connector.

(USB-628x Devices Only)

 USB-628x OEM devices also have a replaceable 

F 2A 125V fuse that protects the device from overcurrent through the +5 V 
terminal(s).

Replacement fuse information can be found in Table 2. To replace a broken 
fuse in USB-622x/625x/628x OEM devices, complete the following steps.

1.

Power down and unplug the device.

2.

Replace the broken fuse while referring to Figure 13 for the fuse 
locations.

Figure 13.  USB-622x/625x/628x OEM Fuse Locations

1

T 2A 250V (5 x 20 mm) Fuse

2

F 

2A 125V Fuse on USB-628x OEM Devices

2

1