Chapter 2
DAQ System Overview
©
National Instruments Corporation
2-3
(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
An
a
log O
u
tp
u
t
An
a
log Inp
u
t
PFI/
S
t
a
tic DI
PFI/
S
t
a
tic DO
Digit
a
l
Ro
u
ting
B
us
Interf
a
ce
I/O Connector
RT
S
I
Digit
a
l
I
s
ol
a
tor
s
I
s
ol
a
tion
B
a
rrier
A
Co
u
nter
s
P0.GND
AO GND
AI GND
P0
A
A
B
us
P1
