Chapter 1
Introduction to SCXI
©
National Instruments Corporation
1-7
SCXI Terminal Blocks
SCXI terminal blocks attach directly to the front of an SCXI module
and provide a quick, convenient method for connecting I/O signals to
your system. There are two types of SCXI terminal blocks—direct-mount
or TBX.
Direct-mount terminal blocks connect transducers to the screw terminals
that are in a fully shielded terminal block enclosure. Strain-relief clamps
hold the signal wires in place.
Terminal block extensions (TBXs) are DIN rail-mountable and attach to
SCXI modules with shielded cables. These TBX terminal blocks are
functionally equivalent to their direct-mount terminal block counterparts.
Figure 1-4 shows the terminal block options and Table 1-2 lists the modules
with which they work. Table 1-3 lists the TBX terminal blocks and the
modules with which they work.
Several terminal blocks have a temperature sensor for cold-junction
compensation with thermocouples. Terminal blocks can also perform
additional signal conditioning function, including high-voltage attenuation,
AC/DC coupling, bridge offset nulling, and shunt calibration.
SCXI-1163
Digital output
32-channel optically-isolated digital output
SCXI-1163R
Digital output
32-channel optically-isolated solid-state relay
SCXI-1180
Accessory
Feedthrough panel
SCXI-1181
Accessory
Breadboard
SCXI-1200
Analog, digital,
and timing I/O
Multifunction module with parallel port communication
SCXI-2400
Serial
communication
RS-232/RS-485 serial communication interface
Table 1-1.
SCXI Modules (Continued)
Product
Classification
Description
