Chapter 3
Feature Descriptions
©
National Instruments Corporation
3-11
cFP-21xx and cFP-BP-x User Manual
Figure 3-5.
Wiring the cFP-2120 External Input and Output Terminals
Power Source (Isolated Power Connector)
The cFP-21
xx
power connector is a 6-pin screw-terminal connector that
accommodates both primary and backup power supplies. The cFP-21
xx
uses the power supply with the higher voltage level, indicating which
supply it is using on the channel called Power Source in software. A value
of 0 indicates the primary supply, and a value of 1 indicates the backup
supply. If the output voltages of the two power supplies are within
0.1–0.6 V of each other, the cFP-21
xx
can use either supply.
Removable Compact Flash (cFP-2120 Only)
You can use compact flash for removable data storage with the cFP-2120.
The controller takes Type I and Type II compact flash up to 512 MB. With
the power off, open the compact flash cover and plug a compact flash into
the slot, then power up the controller. You can access the removable
compact flash by using LabVIEW file I/O VIs running embedded on the
controller. To read from or write to the removable compact flash, point the
VI to the D drive on the controller.
Caution
You must power down the controller before installing or removing a compact
flash. Removing the compact flash without powering down the controller can cause data
corruption. In order to get data from the compact flash while the controller is operating,
use an FTP client or a LabVIEW remote front panel and download the data from the D
drive on the controller.
C
C
O2
C
O1
LED B
C
I2
I1
LED A
R2
R1
Switch 2
Switch 1
