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Chapter 1 Getting Started with the cDAQ Chassis
Using the cDAQ Chassis
The cDAQ system consists of three parts—C Series I/O module(s), the cDAQ module interface,
and the STC3—as shown in Figure 1-10. These components digitize signals, perform D/A
conversions to generate analog output signals, measure and control digital I/O signals, and
provide signal conditioning.
Figure 1-10. Block Diagram
C Series I/O Module
National Instruments C Series I/O modules provide built-in signal conditioning and screw
terminal, spring terminal, BNC, D-SUB, or RJ-50 connectors. A wide variety of I/O types are
available, allowing you to customize the cDAQ system to meet your application needs.
C Series I/O modules are hot-swappable and automatically detected by the cDAQ chassis.
I/O channels are accessible using the NI-DAQmx driver software.
Because the modules contain built-in signal conditioning for extended voltage ranges or
industrial signal types, you can usually make your wiring connections directly from the C Series
I/O modules to your sensors/actuators. In most cases, the C Series I/O modules provide isolation
from channel-to-earth ground and channel-to-channel.
For more information about which C Series I/O modules are compatible with the cDAQ chassis,
refer to the Developer Zone document, C Series Support in NI-DAQmx. To access this
Developer Zone document, go to
ni.com/info and enter the Info Code rdcdaq.
C Series
I/O Module
C Series
I/O Module
(NI cDAQ-9184/9188)
cDAQ Module
Interface
STC3
Ethernet/
Wireless
Network
Chassis
PFI Terminals
(NI cDAQ-9188)
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