I/O Connector Signal Description; Ni Pxie-4300 Block Diagram; Table 2-2. I/O Connector Signal Descriptions - National Instruments SC Express Series User Manual

Chapter 2 Using the NI PXIe-4300

I/O Connector Signal Description

Table 2-2 describes the signals found on the I/O connectors.
Signal
Names Reference
COM
<0..7>
AI <0..7>+, COM <0..7>
AI <0..7>-
PFI <0,1>
RSVD

NI PXIe-4300 Block Diagram

Figure 2-2 shows the block diagram of the NI PXIe-4300 module.
2-4 | ni.com

Table 2-2. I/O Connector Signal Descriptions

Direction
— —
Input
COM 7 Input
COM 7 Bi-Directional
Description
Analog Input Isolated Common
Ground—These terminals are the
reference point for differential analog input
measurements.
Analog Input Channels 0 to 7—AI+ and
AI- are the positive and negative inputs of
differential analog input.
Programmable Function Interface
Channels 0 to 1—Each of these terminals
can be individually configured as PFI
terminals. They can be used to supply a
start, reference, or pause trigger, or be used
as an external timing source for AI.
Note: These channels may only be
referenced to channel 7 in order to
maintain safety isolation.
These pins are reserved for communication
with the accessory.