16
|
ni.com
|
NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
Status LED
The green status LED, when lit, indicates a position is connected to a powered NI PXIe-4339
module. The location of the Status LED is shown in Figure 5.
PFI0
The PFI0 connector provides a female BNC connection to the PFI trigger line of the
NI PXIe-4339. The RM-4339 passes this signal directly through. Refer to the
NI PXIe-4339
User Manual
for more information about using the PFI trigger line. Refer to Table 6 for signal
names and descriptions.
External Shunt
The 25-pin D-SUB connector is used to attach the optional SCAL-4339 Shunt Calibration
Accessory.
The SCAL-4339 Shunt Calibration Accessory allows a user to provide an external shunt
calibration resistor in place of the built-in 100 k
Ω
SCA shunt calibration resistor. Through
software configuration, the user provided resistors on the SCAL-4339 Shunt Calibration
Accessory can be connected to the SCA terminal pairs of the RJ50 connectors. Eight pairs of
through hole sockets are provided on the SCAL-4339 Shunt Calibration Accessory for installing
the user provided resistors. Figure 6 illustrates opening the SCAL-4339 and installing resistors.
Table 6.
BNC Connector Pin Assignments
BNC PFI0 Connector Pin
Diagram
Pin
Signal Name
Signal Description
1
PFI0
PFI input
2
DGND
Digital ground
1
2