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Chapter 2 DAQ System Overview
© National Instruments Corporation 2-3 NI 6124/6154 User Manual
(NI 6154 Only) S Series isolated hardware also includes bank and
channel-to-channel isolation. Isolated DAQ hardware allows for increased
protection against hazardous voltages, rejection of common-mode
voltages, and reduction of ground loops and their associated noise.
Figure 2-3 shows the components of the isolated S Series (NI 6154) device.
Figure 2-3. General NI 6154 Block Diagram
DAQ-STC2
The DAQ-STC2 implements a high-performance digital engine for
S Series data acquisition hardware. Some key features of this engine
include the following:
• Flexible AI and AO sample and convert timing
• Many triggering modes
• Independent AI, AO, DI, and DO FIFOs
• Generation and routing of RTSI signals for multi-device
synchronization
• Generation and routing of internal and external timing signals
P1.GND
Analog Output
Analog Input
PFI/Static DI
PFI/Static DO
Digital
Routing
Bus
Interface
I/O Connector
RTSI
Digital
Isolators
Isolation
Barrier
A
Counters
P0.GND
AO GND
AI GND
P0
A
A
Bus
P1